Trim and Stability Flashcards
(500 cards)
1
Q
The liquid mud tanks on your vessel measures 20’ x 18’ x 7’. The vessel’s displacement is 986 tons and the specific gravity of the mud is 1.6. What is the reduction due to 2 of these tanks being slack?
A
0.88
2
Q
Find the relative density of dock water whose density 1,015 kgs / cu. m?
A
1.015
3
Q
Your ship 12,000 tons displacement has a center of gravity 21.5 ft above the keel. You run aground and estimate the weight aground is 2,500 tons. The virtual rise in the center of gravity is _______.
A
5.66
4
Q
Find the TPC in sea water of a vessel whose length and breadth of the waterplane at a particular draft are 130 meters and 23 meters respectively. Waterplane coefficient is 0.84.
A
25.74
5
Q
What is the TPC of a box-shaped vessel 114 meters X 26.2 meters X 10 meters floating at an even keel draft of 5.16 meters in SW?
A
30.61
6
Q
A vessel has deadweight carrying capacity at load displacement of 10,500 tons. Fuel, water and stores requires 1500 tons. Her cubic capacity is 500,000 cu.ft. What is the average stowage factor of a cargo that she could carry that would put her full and down?
A
55.55
7
Q
A bulk freighter 580 ft in length, 60 ft beam, with a waterplane coefficient of 0.84, is floating in fresh water at a draft of 21’. How many long tons would it take to increase the mean draft by 1”?
A
67.6
8
Q
A vessel is loading within the tropical zone. She will enter the summer zone after 6 days from departure. She consumes 45 tons of fuel and 8 tons of water daily. How many tons may she load over that allowed by her summer zone mark.
A
318
9
Q
At any given draft the TPI of a vessel can be found by dividing the area of the water plane by:
A
420
10
Q
You are going to load bales of wool having a stowage factor of 100 in # 3 lower hold which has a bale cubic of 62,000. How many tons of the wool can be stowed in the compartment, assuming 10% broken stowage?
A
558
11
Q
The lower hold of your vessel has a bale capacity of 60,000 cubic feet. How many tons of cotton in bales having a stowage factor of 85 can be stowed in the lower hold, assuming a broken stowage of 20%?
A
565
12
Q
You are loading a cargo of canned goods with a stowage factor of 65. If you allow 15% for broken stowage, how many tons can be loaded in a space of 55,000 cubic feet?
A
719
13
Q
How many board ft of dunnage are in draft 4 ft wide, 1.5 ft high and 13 ft long?
A
936
14
Q
A sling is rigged on a piece of a pipe weighing 1000 lbs.. The angle between the sling legs is 140 and the legs are of equal length. What stress is exerted on each sling leg when the pipe is lifted?
A
1469
15
Q
The lower hold of your vessel has bale capacity of 45,000 cubic feet. How many cases of cargo weighing 450 lbs. and measuring 2.5 feet by 3 feet could be stowed in the hold, assuming a broken factor of 15 percent?
A
1700
16
Q
In order to repair the sweat battens, you need to order 50 pieces of lumber of one inch x 6 inches x 12 feet. How many board feet should be ordered?
A
3,600
17
Q
A tanker is loaded with 5,000 barrels of petroleum. The cargo was loaded at a temperature of 70 F, and the coefficient of expansion is .0004. What is the net amount in barrels of cargo loaded?
A
4980
18
Q
Find the free surface constant for a tank that is 70 feet long, 35 feet wide and 25 feet deep. The specific gravity of the liquid in the tank is 0.78 and the ship is floating in salt water having a density of 1.026.
A
5,430.80
19
Q
A cargo of 10,000 barrels of gasoline is loaded at a temperature of 90°F and a cargo temperature of 55°F is expected at the discharge port. Coefficient of expansion is 0.0007.
A
9790
20
Q
A cargo of 10,000 barrels of gasoline is loaded at a temperature of 90°F, and a cargo temperature of 55°F, is expected on this voyage. It has a coefficient of expansion of 0.0006. How many barrels would you expect to discharge at your destination?
A
9790
21
Q
A cargo of oil has a coefficient of expansion of 0.0005 per degree F. If this cargo is loaded at 70 F and a cargo temperature of 90 F is expected at the discharge port. How many barrels of cargo would you expect to unload if you loaded 10,000 barrels?
A
10,100
22
Q
Find the displacement of your vessel, if the deduction of your vessel’s freeboard when loading in fresh water is 7.4 inches, the TPI is 52 tons at summer load draft.
A
15400
23
Q
A vessel’s light displacement is 12,000 tons. It’s heavy displacement is 28,000 tons. When fully loaded it carries 200 tons of fuel and 100 tons of water and stores. What is the cargo carrying capacity in tons?
A
15,700
24
Q
You have a shipment of lumber. Each piece is 3 inches thick, 3 inches wide and 15 feet long. If 2,000 pieces are loaded, this is equal to board feet of ______.
A
22,500
25
A vessel displacing 34,000 tons. A tank 80 ft long x 60 ft wide x 30 ft deep is half filled with fresh water (SG 1000). Calculate the free surface constant of the tank.
40100
26
A vessel will load 20 piles of wood. Each pile is 6 feet high, breadth is 6 feet and length is 10 feet. This is equal to how many board feet?
86,400
27
You are to load consignment of lumber. Each piece measures 3 inches thick, 12-inhes wide and 16 feet long. There are 30,000 pieces in the shipment. How many boar feet would be listed on the Bill of Lading?
96,000
28
You are to load a consignment of lumber. Each piece measures 2 inches, 10 inches wide and 16 ft long. There are 30,000 pcs. in the shipment. How many board ft would be listed on the bill of lading?
800,000
29
You are to load a consignment of lumber. Each piece measure 3-inches thick, 12-inches wide and 16-feet long. There are 30,000 pieces in the shipment. How many board feet would be listed on the Bill of Lading?
1,440,000
30
A ship is loaded to its summer displacement and is to proceed down river from a berth where the dock water RD is 1.004 to another berth where the dock water RD is 1.016. If the FWA is 260 mm, calculate the change in draft that will occur.
124.8 mm
31
A tank holds 130 tonnes when full of fresh water. Find how many tonnes of seawater it will hold.
133.3 tones
32
If the FWA of your vessel at summer draft is 8 inches, find the Dock Water Allowance if the density of the water is 1015.
3.2 inches
33
The GG' Formula is used to solve for:
All of these
34
KM can be obtained from: I. Hydrostatic curves. II. A table in the ship's stability booklet.
Either I or II
35
Which of the following quantities does the ship's officer calculate in doing a transverse stability problem to determine GM? I. KG. II. KM.
I
36
Another expression for height of transverse metacenter is: I. Metacentric height. II. KM.
II
37
A ship is floating in dock water of density 1005 kg per cu.m. with a FWA of 140 mm. Find the change in draft when she passes from dock water to salt water.
112 mm
38
A ship is floating in dock water of density 1002 kg per cu.m. Find the change in draft when she passes from dock water to salt water if her FWA is 130 mm.
119.6 mm
39
When floating in fresh water at a draft of 6.5 m a ship displaces 4288 tonnes. Find the displacement when the ship is floating at the same draft in water of density 1015 kg per cu.m.
4,352.32 tonnes
40
A ship displaces 7,500 cu.m. of water of density 1,000 kg. per cu.m. Find the displacement in tonnes when the ship is floating at the same draft in water of density 1015 kg. per cu.m.
7,612.5 tonnes
41
A moment is: I. A weight. II. A distance
Either I or II
42
The product of displacement and GZ is: I. An indication of the vessel's true stability. II. Righting moment.
Either I or II
43
A moment of 300 f00t - ton is created by a force of 15,000 tons. What is the moment arm?
0.02 ft
44
A ship's FWA is 170 mm, and she is floating in dock water of density 1008 kg per cu.m. Find the change in draft when she passes from dock water to salt water.
115.6 mm
45
Your barge floats at a mean draft of 2.1 meters, the density of the water at the dock is 1020 kg per cubic meter. Solve the mean draft for the same mass displacement in salt water.
2m 5s 400ms
46
A vessel of 10,000 tons has 5,000 tons of cargo aboard. Existing KG is 27 feet. Solve for the new KG after the 5,000 tons of cargo is shifted up to 10 feet.
30.33 ft.
47
A ship is floating in dock water of density 1020 kg per cu.m. with a FWA of 190 mm. Find the change in draft when she passes from dock water to salt water.
38 mm
48
A ship has a FWA of 200 mm. Calculate the change in draft that will occur if the ship proceeds from SW to a berth where the RD of the dock water is 1.018.
56 mm
49
Free surface exists whenever: I. The surface of a liquid within a vessel is free to move. II. The surface of a movable dry bulk cargo is free to move.
Either I or II
50
The beam of a vessel is 65 feet. Find the GM if the rolling period 27 seconds.
1.12 feet
51
On a vessel displacing 8,000 tons, what is the reduction in metacentric height due to free surface when the tank 45 ft long and 45 ft wide is partly filled with salt water?
1.22 ft
52
Given a beam of 110 feet, find the approximate GM for vessel with a rolling period of 40 seconds.
1.46 feet
53
A vessel displacing 8,150 tons is inclined by 3.5° to starboard when a weight of 40 tons was moved to starboard at a distance of 23 feet from the centerline. From the vessel's hydrostatic properties KM is found to be 29.06 feet. What is the GM?
1.84 feet
54
What distance will a weight of 100 tons have to be moved in order to remove a 3° list from a vessel? Displacement is 9,500 tons and GM is 3.0 feet.
14.94 feet
55
How much of a list will a vessel of 10,000 tons take after a weight of 250 tons is shifted 30 feet across the deck? GM is 2.5 feet.
16° 42'
56
Find the approximate GM for a vessel with a rolling period of 10 seconds and a beam of 96 feet.
17.8 feet
57
The rolling period of a vessel is 18 seconds. Find the GM if her beam is 75 feet.
3.4 feet
58
A weight is to be loaded to a ship of 3,200 tons displacement. The cargo is 200 tons at a distance of 60 feet from the original position of gravity. Find the shift of G.
3.53 feet
59
If a vessel has a displacement of 15,000 tons and a righting arm of 2 feet, what is the vessel's righting moment if the ship has a GM of 3 feet?
30,000 foot-tons
60
A ship initially upright displaces 12,000 tonnes and has GM 0.6 meter. A weight of 60 tonnes already on board is shifted 14 meters horizontally across the deck. Calculate the resulting angle of list.
6.7°
61
Metacentric height method of expressing stability tendency i useful for: I. Small angles of inclination. II. Large angles of inclination.
I only
62
The formula given below describes which of the following types of rolling periods?
Natural rolling period
63
Stability calculations should be made:
Prior to the stowage plan being made
64
A vessel with the following corrected drafts: Fwd 11.2578 m, Aft 11.6587 m and Mid 11.400 m. Find the deflection.
0.0583m hogging
65
A vessel with the following corrected drafts: Fwd 12.3562 m, Aft 12.5215 m and Mid 12.500 m. Find the deflection.
0.0612m sagging
66
What is the reduction in metacentric height (GGo) due to free surface when a tank 60 feet long and 30 feet wide is partially filled with salt water, and is fitted with a centerline bulkhead? (The vessel has a displacement of 10,000 tons.)
0.1 foot
67
A vessel displacing 18,000 tons has a KG of 50 feet. A crane is used to lift cargo 20 tons from a supply vessel. When lifting, the head of the crane boom is 150 feet above the keel. What is the change in KG?
0.11 foot
68
Calculate the righting arm of a vessel whose GM is 0.65 meter when inclined at an angle of 12 degrees.
0.135 meter
69
A container vessel of 15,000 tons displacement is approching her berth at a speed of 3 knots. Its block coefficient is 0.79. Calculate the value of squat.
0.14 meter
70
The center of pressure on a bulkhead flooded on one side a depth, measures from the bottom is:
0h 19m 48s
71
You have approximately 24 tons of fish on deck. What will be the shift in the gravity after you shift the fish to the fish hold, a vertical distance of 8 feet? (total displacement 540 tons).
0.36 feet
72
A vessel with displacement of 300 tons have 15 tons of cargo on deck. What will be the shift in the center of gravity after you move the cargo to the hold a vertical distance of 8 feet?
0.4 feet
73
You have approximately 14 tons of fish on deck. What will be the shift in the center of gravity after you shift the fish to the fish hold a vertical distance of 6 ft? (total displacement is 210 tons)
0.4 ft
74
A reefer vessel of 13,000 tons displacement is approaching her berth at a speed of a 5 knots. Its block coefficient is 0.79. Calculate the value of squat.
0.40 meter
75
A box shaped vessel floats upright on an even keel in fresh water of density 1,000 kgs/cu.m. and the center of buoyancy is 50 cm. above the keel. Find the height of the center of buoyancy above the keel when the vessel is floating in salt water of density 1,025 kgs/cu.m?
0m 29s 280ms
76
On a vessel of 6,000 tonnes displacement, what is the reduction in GM due to free surface when a double bottom tank 20 meters long, 12 meters wide and 2 meters deep is only half filled with seawater?
0m 29s 520ms
77
A barge is navigating along a shallow water inside the harbour at a speed of 5 knots. Calculate the increase in draft due to squat.
0.5 meter
78
At sea vessel whose width is 20 meters and full period of roll is 18 seconds, what is her estimated, metacentric height?
0m 30s 600ms
79
To check the stability, a weight of 10 tons is lifted with the jumbo boom whose head is 45 ft. from the ship's centerline. The clinometer show's a list of 5.0 degree with weight suspended. Displacement including the weight is 9,000 tons. The GM while in this condition is:
0.57 foot
80
A barge 70 meter long, 12 meters wide with a depth of 8 meters has an amidship compartment 15 meters long, filled with cargo whose permeability is 45%. She is on even keel at 5.80 meters. Calculate the increase in draft if this compartment is bilged.
0.62 meters
81
To check stability, a weight of 40 tons is lifted with the jumbo boom, whose head is 40 feet from the ship's centerline. The clinometer shows a list of 6.5 degrees with the weight suspended; displacement including weight is 16,000 tons. The GM while in this condition is:
0.88 foot
82
A box-shaped vessel 60 meters long, 11 meters wide with a depth of 8 meters has an empty amidship compartment 12 meters long. The vessel is on an even keel of 3.80 meters. Calculate the increase in draft if this compartment is bilged.
0.95 meters
83
The following particulars are given: W= 8,800 tons, Moment of Inertia (I) = 1,166 m4 is partly full of HFO of RD 0.95, KM 10.1 m, KG 9.0 m. Find the GM fluid.
0m 58s 440ms
84
When reading the draft marks, you notice the water level forward is 5 inches below the 10, and the water level aft is 3 inches below the top of the 10. What is the mean draft?
09' 11"
85
A barge has a mean draft of 5.80 meters in sea water of density 1.025 tons/m3. On docking, the mean draft became 5.945 meters. What is the dock water density?
1,000 kgs/m3
86
A barge has a draft of 6.70 meters in sea water of relative density 1.025. On arrival at the discharging port, the draft was observed to be 6.786 meters. What density is she in?
1,012 kgs/m3
87
You are to load lead, SF 18 and cotton, SF 78. The available deadweight capacity is 1,600 tons of cargo and cubic capacity is 58,800 cu. ft. Disregarding broken stowage, how much of each cargo should be loaded to make her Full and Down?
1,100t lead, 500t cotton
88
You are at sea on a vessel that has a beam of 50 ft and you calculate the period of roll to be 22 seconds. What is the vessel's metacentric height?
1.0 ft
89
A box-shaped vessel has a draft of 3.75 m in salt water. On entering a dock her draft becomes 3.84 m. find the density of the dock water:
1.001ton/cu.m.
90
A block measuring 6.0m x 2.0m x 1.5m and weighing 18.36 tonnes. In what relative density of water will the block be placed so that it will neither float nor sink.
1.020
91
A vessel has a displacement of 25,000 cubic meter in density 1.025 kg/cubic meter, find the density of water in which she would displace a volume of 25,123 cubic meter.
1.020
92
A box-shaped vessel 70 meters long, 12 meters wide with a depth of 8 meters has an empty amidship compartment 14 meters long. The vessel is on an even keel of 4.20 meters. Calculate the increase in draft if this compartment is bilged.
1.05 meters
93
A box shape vessel 20 m x 4 m x 2 m has a SW mean draft of 1.05 m. Calculate her draft in DW of RD 1.012.
1m 3s 780ms
94
The displacement of box-shaped vessel is 1028 tons. Her measurement is 150 feet x 30 feet x 14 feet, draft is 8 feet. The KG is at the waterline. The weight of 20 tons is shifted from forward towards thes stern at a distance of 100 feet. Calculate the change of trim if the calculated MCT1" is 1843 ft-tons.
1.09 inches
95
A cargo of 30 tons is to be loaded on deck 30 feet from the ship's centerline. The ship's displacement including the 30 tons cargo will be 9,000 tons and the GM is 5 feet. The list of the vessel after loading this cargo will be:
1.14 degrees
96
The liquid mud tanks on your vessel measure 22'L by 16'B by 7'D. The vessel's displacement is 568 T and the specific gravity of the mud is 1.6. What is the reduction in GM due to 2 of these tanks being slack?
1.18 ft
97
A box shape vessel 24 m x 5 m x 3 m has a mean draft of 1.2 m in DW of RD 1.009. Calculate her draft in DW of RD 1.019.
1m 11s 280ms
98
On a vessel of 10,000 tons displacement, compute the reduction in GM due to free surface in a hold having free water on the tank top, the size of the hold is 40 feet long and 50 feet wide.
1.2 feet
99
A vessel with a displacement of 18,177.7 long tons and a KG of 52.0 feet discharges 200 long tons from a KG of 130 feet. To remain at draft, ballast is added at a height of 10 feet. What is the change in KG?
1.32 feet downward
100
The liquid mud tanks on your vessel measure 32 feet length by 15 feet wide by 8 feet deep. The vessel's displacement is 640 tons and the specific gravity of the mud is 1.8. What is the reduction in GM due to 2 of these tanks being slack?
1.41 feet
101
A vessel displacing 30,500 long tons has a KG of 60 feet. A weight of 500 long tons is discharged from a VCG of 150 feet. What is the change in KG?
1.5 feet downward
102
A vessel displacing 29,500 long tons has a KG of 60 feet. A weight of 500 long tons is added at a VCG of 150 feet. What is the change in KG?
1.5 feet upward
103
A tank with a horizontal base and vertical sides is 10 meters deep and has a rectangular trunkway 1 meter high. The volume of the tank alone is 8,000 cubic meters and that the trunkway is 500 cubic meters. Find the ullage when 5,320 tons of vegetable oil of RD 0.7 is loaded.
1m 30s
104
Your vessel measures 119 feet long by 17 feet in beam. If the natural rolling period at a draft 5'-05" is 6 seconds, what is the GM?
1.58 feet
105
You are at sea on a vessel whose beam is 60 feet and full period of roll is 20 seconds. What is the estimated metacentric height of the vessel?
1.7 ft
106
Your vessel displaces 645 tons and measures 132'L by 34'B. What is the reduction in GM due to free surface if the fish hold (30'L by 26' B by 8'D) is filled with 3.0 feet of water? (Each foot of water weighs 22.3 tons)
1.76 feet
107
Your vessel has a displacement of 19,800 tons. It is 464 feet long, and has a beam of 64 feet. You have timed its full rolling period to be 21.0 seconds. What is your vessel's approximate GM?
1.8 ft
108
Your vessel has a displacement of 19,800 tons. It is 464 feet long, and has a beam of 64 feet. You have timed its full rolling period to be 21.0 seconds. What is your vessel's approximate GM?
1.8 ft.
109
Your vessel has loaded 4 container on deck 55 feet from the centerline with a total weight of 52 T. the displacement is 17,000 T and has inclined 5°. What will be the vessel's GM at the present condition?
1.92 feet
110
A vessel displacing 18,000 tons has TPI of 45 tons, her fresh water allowable will be:
10 inches
111
A ship's waterplane has 7 ordinates. If the length of the waterplane is 60 meters, what is the common interval (h)?
10 meters
112
Find the displacement of a vessel if the angle of list is 1 °43', GM is 3 feet, the weight to be shifted is 30 tons to a distance of 30 feet across her deck,.
10,000 tons
113
Find the displacement of a vessel if her GM is 3 feet, the weight to be shifted is 30 tons to a distance of 30 feet across her deck, the angle of list is 1º 43'.
10,000 tons
114
A rectangular tank on a tanker is 21 meters long, 26 meters wide and 18 meters deep. The mean draft is 12.2 meters. How much sea water will it accommodate if it is filled to full capacity?
10,074 tons
115
As a result of performing the inclining experiment it was found that a ship had an initial metacentric height of 0.5 meter. A mass of 40 tonnes, when shifted 10 meter transversely, had listed the ship 4.5 degrees. Find the ship's displacement.
10,165 tonnes
116
A ship has an initial GM = 0.8 meter. When a mass of 50 tonnes is shifted transversely a distance of 15 meter across the deck, it causes a list of 5 degrees. Find the ship's displacement.
10,715 tonnes
117
A vessel displacing 32,000 tons and a TPI of 72. How much will her draft increase when docking where the relative density is 1002.
10.2 inches
118
A vessel with the following corrected drafts: Fwd 10.5201 m, Aft 10.8250 m and Mid 10.685 m. Find the quarter mean draft.
10.6819 Meters
119
A ship floating at water density of 1015 kg/m3 displaces 45,250 cubic meters of water, when she shifted to another berth she displaced a new volume of 45,560 cubic meters. Find the density of water in the new berth, considering there is no change with the displacenebt
1008 kg/cu.m.
120
A ship floating at water density of 1020 kg/m3 displaces 46,460 cubic meters of water, when she shifted to another berth she displaced a new volume of 46,920 cubic meters. Find the density of water in the new berth, considering there is no change with the
1010 kg/cu.m.
121
A ship floating at water density of 1025 kg/m3 displaces 46681 cubic meters of water, when she shifted to another berth she displaced a new volume of 47141 cubic meters. Find the density of water in the new berth, considering there is no change with the sh
1015 kg/cu.m.
122
Find the thrust on a keel plate 10m x 2m when the draft of the ship is 5m in salt water.
102.5 tonnes
123
A box-shaped vessel, 150 feet x 30 feet x 14 feet, her draft is 8 feet and even keel. The KG is at the waterline. A weight of 20 tons is shifted from forward towards the stern at a distance of 100 feet. Calculate displacement.
1028 tons
124
The displacement of your ship is 6,400 tons when floating at relative density 1025. Your ship has to proceed to an anchorage where the relative density of water is 1008. Find how much weight of cargo to be discharged if your vessel is to remain at salt water draft.
106 tons
125
A vessel's heavy displacement is 24,500 tons with light displacement of 13,300 tons. Fully loaded, it carries 300 tons of fuel and stores. What is the vessel's deadweight?
11,200 tons
126
A semi-submersible object is floating in sea water displaces 717,500 cubic feet. Find the displacement.
11,498 long tons
127
You are on a vessel that has a metacentric height of 4 feet, and a beam of 50 feet. What can you expect the rolling period of the vessel to be?
11 seconds
128
A vessel displacing 2,400 tons and a KG of 10.8 meters, a weight of 50 tons already on board is raised 12 meters vertically. What is the new KG?
11.05 meters
129
A ship enters port with arrival sea water draft of 11.00 m. If her FWA is 254, what will be her draft in dock water with relative density of 1.009?
11.16 Meters
130
A ship with FWA of 254 mm and a Summer Draft of 11.184 m. To what draft which she may load in river of density 1.008?
11.357 Meters
131
The displacement of a vessel is 6,000 tonnes, KM being 7.3 meters, KG is 6.7 meters. She is floating upright. A cargo weighing 60 tonnes on board be shifted 12 meters transversely. Solve for the resultant list.
11°18.5'
132
To what depth can a ship with FWA of 212 mm submerge her load-line in dock water of density 1012 kg/m3?
110 mm
133
When reading the draft marks, you notice the water level forward is 4 inches below the 11 and the water level aft is 2 inches below the top of the 11. What is the mean draft?
11'-00"
134
You are in the process of loading 465,000 barrels of cargo oil. At 1030, on 5 November, you gauge the vessel and find that you have loaded 203,0000 barrels. At 1200, you find that you have loaded 219,000 barrels. If you continue loading at the same rate, you will finish at approximately:
1104, 6 November
135
What is the displacement of a barge which measures 85' x 46' x 13' and is floating in salt water with a draft of ten feet?
1117 tons
136
A vessel shifted berth from water of density 1005 kg/m3 to water density 1025 kg/m3. If her FWA is 140 mm, by how much she will change her draft?
112 mm
137
You are planning an inclining experiment. How large a weight will be required to create a 4° list if the vessel's displacement is 8,900 tons, estimated GM is 6.0 feet, and the distance that the weight can be moved off the centerline is 33 feet?
113.2 tons
138
A vessel with the following corrected drafts: Fwd 12.5201 m, Aft 12.8250 m and Mid 12.685 m. Find the quarter mean draft.
12m 40s 914ms
139
Your vessel is floating in dockwater whose density is 1005. Your fresh water allowance is 150 mm. How far can her S.W. mark be submerged when loaded so as to float at her mark in salt water whose density is 1025?
120 mm
140
A ship of 12,000 tons displacement is heeled by 6°. Find the moment of statical stability if her righting lever is then 0.1 m. Find her KG if her KM is 8.2 m.
1200 tm, 7.243 m
141
The present draft is 8.20 mtrs fwd and 8.60 mtrs aft. You want to load at your maximum load draft of 8.88 mtrs. If the TPC at this draft is 26, how much cargo remains to be loaded?
1248 tons
142
A vessel in a certain draft condition has a block coefficient of 0.77, k is equal to 30, TPI of 50 and breadth of the vessel is 60 feet. Solve for MTI.
1250.0 foot-tons/inch
143
What would be the angle of lool of a 6,300 ton displacement vessel when its GM = (-) 0.11 meter and BM = 4.1 meters.
13.04 degrees
144
A ship of 6,500 tons displacement has a GM of (-) 0.14 meter. If BM = 5.2 meters. Find the angle of loll.
13.06 degrees
145
Calculate the angle of loll of a 6,500 ton displacement vessel when its GM + (-) 0.12 meter and BM = 4.3 meters.
13.29 degrees
146
Find the angle of loll of a vessel with a GM = (-) 0.13 meter and BM = 4.6 meters. Displacement is 5,300 tons.
13.37 degrees
147
A vessel displacing 5,800 tons has a GM of (-) 0.14 meter and BM = 4.7 m. Calculate the Angle of Loll.
13.7 degrees
148
Find the displacement of your vessel, if the deduction of your vessel's freeboard when loading in fresh water is 7.4 inches, the TPI is 52 tons at summer load draft.
15,400 tons
149
The length of your vessel is 480 feet, draft is 18 feet 7 inches forward and 22 feet 3 inches aft. TPI is 46, MCTI is 1130 ft-tons, CF is at amidships. A weight of 100 tons is loaded 180 feet forward from amidships. Solve change of trim.
15.93 inches by the head
150
By how much can a ship submerge her load-line in water density 1004 kg/m3, if her FWA is 185 mm?
155 mm
151
At the start of loading operations, drafts fwd = 6.30 meters, aft = 6.70 meters. After loading, a mean draft of 7.25 meters was observed. If TPC is 22, how much cargo was loaded?
1650 tons
152
The new draft is 17 feet and 2.7 inches inwater of density 1025. Her fresh water allowance is 7.25 inches. Find the old draft if your vessel is floating in a water of density 1005.
17 feet 8.50 inches
153
A vessel floats at a draft of 17 feet 8 -1/2 inches in water of density 1005. If her Fresh Water Allowance is 7-1/4 inches. Find her draft on passing into water of Density 1025.
17 ft. 2.75 in.
154
A deep tank is half full of water, which has a rectangular free surface, 30 feet long and 25 feet wide. The ship displaces 2050 tons, her KG is 18.7 feet if the effect of free surface is ignored. Solve her actual KG, allowing for the effect of free surface.
19.24 feet
155
A vessel shifted berth from water of relative density 1005 to water of relative density 1024. If her FWA is 254 mm, by how much she will change her draft?
193 mm
156
A vessel shifted berth from water of density 1005 to water density 1024 kg/m3. If her FWA is 254 mm, by how much she will change her draft?
193mm
157
As a result of performing the inclining experiment it was found that a ship had an initial metacentric height of 1 meter. A mass of 10 tonnes, when shifted 12 meter transversely, had listed the ship 3.5 degrees. Find the ship's displacement.
1962 tonnes
158
Your vessel's forward draft is 24' 00" and the aft draft is 26' 06". The trim is:
2' 06" by the stern
159
A vessel is floating in water of density of 1020, her displacement is 6249 tons, GM of 2.2 feet. Find her moment of statical stability at an angel of heel of 9°.
2,150 foot-tons
160
A block measuring 5.0m x 1.0m x 0.5m. Will be placed in water of relative density 1.012. What will be its weight so that it will neither float nor sink?
2,530 kgs
161
A box-shaped vessel 45 meters long, 10 meters wide and 8 meters deep is floating at a mean draft of 6.2 , meters in a dock where the density is 1.010 tons/m3. Find its displacement.
2,818.tons
162
What is the height of the center of buoyancy above the keel of a boxed-shaped vessel 60 meters X 10 meters with an even keel draft of any 4 meters in SW?
2m
163
The length of your vessel is 480 feet, draft is 18 ft. 17 in. forward and 33 ft. 03 in. aft. TPI is 46, MCT1" is 1130 ft-tons, C.F. is at amidships. A weight of 100 tons is loaded forward from amidship. Solve for the change of mean draft.
2.17 inches
164
The length of your vessel is 480 feet, draft is 18 ft. 7 inches forward and 33 ft. 3 inches aft. TPI is 46, MCT1 is 1130 ft-tons, CF is at amidships. A weight of 100 tons is loaded forward from amidships. Calculate parallel sinkage.
2.17 inches
165
What is the metacentric height of the vessel with 1000 tons light displacement, 3000 tons GRT and 6 meters initial KG loaded 3500 tons cargo with 6 meters KG, and loaded draught KM of 7 meters?
2.34 meters
166
Find the immersion if a vessel's displacement is 10,000 tons, TPI is 50, difference in densities is 12.
2.4 inches
167
A vessel displacing 28,000 long tons has a KG of 60 feet. A weight of 500 long tons is discharged from a VCG of 150 feet. To maintain draft, ballast is added at a VCG of 10 feet. What is the change in KG?
2.5 feet downward
168
Your vessel has a fwd draft of 26' 11" and aft draft of 29' 07". How many tons of cargo can be loaded before the vessel reaches a mean draft of 28' 06" if TPI is 69?
207 tons
169
Your vessel has a fwd draft of 26' 11" and aft draft of 29' 07". How many tons of cargo can be loaded before the vessel reaches a mean draft of 28' 06" if TPI is 69?
207 tons
170
What is the trim of your vessel if the forward draft is 22'09" and the aft draft is 25'06"?
2'09" by the stern
171
A ship is inclined by moving a weight of 30 tons, a distance of 30 ft from the centerline. A 28 ft pendulum shows a deflection of 12 inches. Displacement including weight moved is 4,000 tons. KM is 27.64 ft. What is the KG?
21.34 ft
172
If your vessel has a GM of one foot and a breadth of 50 feet, what will be your full rolling period?
22 seconds
173
A ship 128 meters long has a maximum beam of 20 meters at the waterline and coefficient of fineness of 0.85. Calculate the TPC at this draft?
22.3 tonnes
174
Your vessel is at a dock where the density is 1012. To what draft will she be loaded so as to draw 23' 06" when she gets to sea where the density is 1026?
23' 10"
175
A weight of 250 tons is loaded on your vessel 95 ft fwd of the tipping center. The vessel's MTI is 1000 ft-ton. What is the total change of trim?
23.75 inches
176
The mean load draft of a vessel is 24 feet 5 inches in salt water. What should be her draft when loading in dock water density of 1005?
24 feet 10.8 inches
177
Your vessel is on an even keel. The MTI is 1000 ft-tons, how many tons of cargo must be loaded in no. 4 hold which is 100 ft. abaft of the tipping center, if she is to have a 2-feet drag?
240 tons
178
Your vessel is on an even keel. The MTI is 1000 ft-tons, how may tons of cargo must be loaded in no. 4 hold which is 100 ft. abaft of the tipping center, if she is to have a 2-feet drag?
240 tons
179
The metacentric height of your vessel is 34 centimeters. Her displacement at summer draft is 35,000 tonnes, her beam is 18.3 meters. Find her rolling period.
25 sec.
180
Find the rolling period of a vessel if her beam is 90 feet and a GM of 2.5 feet.
25 seconds
181
The GM of a vessel is 6.3 feet and her displacement in salt water is 3,200 tons, I is 2,880,000 ft4. If her KB is 5.9 feet, find her KG.
25.3 feet
182
A weight of 350 tons is loaded on your vessel 85 feet forward of the tipping center. The vessel's MTI is 1150 foot-tons. What is the total change of trim?
25.85 inches
183
Your vessel displaces 14,500 tons, with a longitudinal CG 147.5 ft. aft of the FP. If you pump 80 tons of ballast from forward to aft through a distance of 480 feet, your new CG will be:
250.15 feet aft of FP
184
Your vessel displaces 14,500 tons, with a longitudinal CG 247.5 ft aft of the FP. If you pump 80 tons of ballast from fwd to aft through a distance of 840 ft, your new CG will be _________.
250.15 ft aft of FP
185
A ship is inclined by moving a weight of 40 tons (YCG of 46 feet) a distance of 34 feet from the centerline. A 50 foot pendulum shows deflection of 20 inches. The vessel displacement is 7,715 tons. The KM is calculated as being 31.5 feet. What is the KG of the light ship:
26.22 feet
186
Find the new height of the center of gravity after the shift of 1,500 tons of cargo from the main deck to the hold a distance of 40 feet. The vessel has a displacement of 30,000 tons and a KG of 30 feet.
28 feet
187
A ship has an initial GM = 1.0 meter. When a mass of 75 tonnes is shifted transversely a distance of 20 meter across the deck, it causes a list of 3 degrees. Find the ship's displacement.
28,620 tonnes
188
The moment created by a force of 12,000 tons and a moment arm of 0.25 foot is:
3,000 ft-tons
189
A box shape vessel 60 m x 10 m x 10 m floats at an even keel draft of 6 m in DW of RD 1.020. Find her KB in DW of RD 1.004.
3m 2s 880ms
190
A vessel displacing 740 tons and measures 141 feet long, breadth 34 feet. What is the reduction in GM due to free surface if the hold below measuring 41 feet long 30 feet wide and 9 feet deep is filled 2.5 feet of water, each foot of water weighs 35.1 tons?
3.18 feet
191
A ship of displacement 2,000 tons and KG 4.2 m, loads 300 tons of cargo (KG 2.0 m), 200 tons of cargo (KG 3.2 m) and 500 tons of bunkers (KG 1.0 m). Find her final KG.
3m 22s 800ms
192
A box-shaped lighter draws 3.73 m in water of relative density 1.010 t/m3. What will be her draft in sea water?
3.675 meters
193
Determine the resultant trimming moment created by a 138 tonnes of cargo loaded 15 meters aft of the LCF and 95 tonnes of cargo loaded 25 meters forward of the LCF:
305 tonnes meter (by the head)
194
Determine the resultant triming moment created by 138 tonnes of cargo loaded 15 meters aft of the LCF and 95 tonnes of cargo loaded 25 meters forward at the LCF.
305 tonnes-meter (by the head)
195
Your vessel displaces 28,500 tons and has a KG of 30 ft., 1,500 tons are discharges with a center of gravity of 12 feet above the keel. What is the height of the center of gravity?
31 feet
196
A barge of triangular cross section is 20 m long, 12 m wide and 6 m deep.Find its displacement if it floats at a draft of 4 m in SW.
328 t
197
A tanker has a mean draft of 32' 05". At this draft, the TPI is 178. The mean draft after loading 1,200 tons will be:
33'-00"
198
Your vessel has a deadweight capacity of 5,000 tons and a cubic capacity of 300,000 cu.ft. You are to load lead, with a stowage factor of 18, and cotton, with a stowage factor of 80. If you load full and down, how much cotton should you load?
3387 tons
199
Your vessel has a deadweight capacity of 5000 tons and a cubic capacity of 300,000 cu. ft. You are to load lead SF 18 and cotton SF 80. If you are to load Full and Down find how much cotton should be loaded.
3387 tons
200
Find the rolling period of a vessel with a GM of 1.5 feet. Her beam is 100 feet.
36 seconds
201
Three ordinates a,b, an c are 12 feet apart and have lengths 37.6 feet to c, 33.5 feet to b, 29.2 feet to a. Required the area contained by the ordinates.
376.4 sq. ft.
202
A floating object displaces 38 cm3 of water density 1.015 t/m3. Find its weight in grammes.
38.6 grams
203
A pile of lumber lying on the dock is said to be 7,200 board feet. This is equal to one of the following dimensions:
3ft x 20ft x 10ft
204
A ship 80 meters long, 18 meters wide and 12 meters deep is floating in fresh water. The length and breadth of the waterplane at a draught of 4.5 meters is 78 meters and 16 meters respectively. What is the vessel's displacement if block coefficient is 0.82?
4,605.1 tons
205
A box-shaped lighter having a draft of 4.24 m in density 1002 kg/m3. Find her draft in brackish water of density 1021 kg/m3.
4.17 meters
206
Your ship is inclined by moving a weight of 60 tons at a distance of 25 feet from the center line. A 40 foot pendulum shows a deflection of 14". The vessel's displacement including the weight moved is 12,000 tons. The value of the KM is 27.64. what is the GM?
4.29 feet
207
A box-shaped vessel 65 meters long, 10 meters wide and 8 meters deep is a port where the density is 1.016 tons/m3. If the displacement is 2,840 tons, what is its draft?
4.30 meters
208
A box-shaped vessel has a mean draft of 4.65 meters in sea water. What would be the approximate mean draft upon entering a port of relative density 1.012?
4.71 mtrs
209
Your vessel is floating in water of density 1010. The fresh water allowance is 8 inces. How far below her marks may she be loaded so as to float at her marks in saltwater of density 1025?
4.8 inches
210
A quantity of grain estimated to be 100 tons shifts transversely by 12 m and upwards by 1.5 m, on a ship of W 12,000 tons, GM 1.2 m. Find the list caused.
4.81° or 4° 49'
211
Your vessel displaces 869 tons and measures 136 feet lenght x 33 feet breadth. You ship a large wave on the after deck. What is the reduction to the GM due to free surface before the "water drains overboard, if the after deck measures 52 feet length x 33 feet breadth and the weight of the water is 52.8 tons?
4.83 feet
212
A floating object displaces 42.5 cm3 of water density 1.006 t/m3. Find its weight in grammes.
42.76 grams
213
A ship floating at a draft of. 6.50 m, having 174 m length, 30 m beam and having coefficient of fineness 0.805 at that waterplane. Find her TPC
43.07 tons
214
A ship of 12,000 tonnes displacement is heeled 6.5°, the Moment of Statical Stability is 600 tonnes-m. Find the initial metacentric height.
44 cm
215
A box shaped vessel with displacement of 20,000 tonnes in fresh water has the following dimensions: Length = 150 m, Breadth = 27 m and Depth = 16 m. Find the volume of reserve buoyancy.
44,800 cu. meters
216
A ship displaces 6,100 tons and is listed 7 degrees to stbd. Her KG is 6.20 meters and her KM is 7.00 meters. Calculate the weight of cargo to load into the port wing of the hold, at a distance of 13 meters from the centerline, in order to make the vessel upright.
46 tons
217
What is the weight of a vessel displacing 45,000 cubic meter in seawater?
46,125 tons
218
Your vessel's draft is 16' 00" fwd and 18' 00" aft. The MTI is 500 ft-tons. How many tons of water must be shifted from the aft peak tank to the fore peak tank, a distance of 250 feet to bring her to an even draft fwd and aft?
48 tons
219
A vessel, 200 feet in length draft marks with the LCF 10 feet aft of amidships, records the following drafts; Port Forward 64'-09"; Port Aft 68'-09"; Starboard Forward 59'-09'; and Starboard Aft 63'-09". What is the list?
5 feet to port
220
A vessel is floating in DW of RD 1.020 at drafts of 4.2 m forward and 6.0 m aft. Find her hydrostatic draft.
5m 4s 560ms
221
Solve for the effect of adding 100 tons to cargo hold No.1 150 feet forward of the tipping center. ITM = 1423 foot-tons and TPI = 53. Find the half trim.
5.27 inches
222
If the vessel's summer draft is 6.70 meters, moulded depth is 12.3 meters, what is her tropical freeboard?
5.46 meters
223
Your vessel displaces 21,000 tons and has a KG of 27 feet. You discharge 1,000 tons from 48 feet above the keel, 1,400 tons from 25 feet above the keel and 4,500 tons from 15 feet above the keel. The vessel's KM was 35.1 feet. What is her final GM?
5.6 feet
224
If the vessel's summer draft is 6.70 meters, moulded depth is 12.3 meters, what is her summer freeboard?
5.6 meters
225
A cargo of 40 tons is to be lifted with a boom located 40 feet from the ship's centerline. The ship's displacement including the suspended cargo is 8,000 tons and the GM is 2 feet with cargo suspended.
5.7 degrees
226
A cargo of 100 tons is to be loaded on deck 20 ft from the ship's centerline. The ship's displacement including the 100 tons of cargo will be 10,000 tons and the GM two feet. The list of the vessel after loading this cargo will be ______.
5.7°
227
A ship of 7,000 tonnes displacement has KM=7.5 m and KG=6.7 m, and is floating upright. A weight of 40 tonnes already on board is shifted 14 m transversely. Find the resultant list.
5.7°
228
If the vessel's summer draft is 6.70 meters, moulded depth is 12.3 meters, what is her winter freeboard?
5.74 meters
229
A vessel is to lift a cargo weighing 30 tons with her boom whose head is 30 feet from centerline. The ship's displacement excluding the weight to be lifted is 8700 tons. KM is 21.5 feet; KG is 20.5 ft. What will be the list of the vessel when cargo is lifted ?
5.8 degrees
230
Determine the dew point when the dry bulb temperature is 74° and the wet bulb temperature is 60°F.
50°
231
A floating object displaces 50.5 cm3 of water density 1.020 t/m3. Find its weight in grammes.
51.5 grams
232
You are required to fill out the cargo distance form. At 0800, your mead draft was 34' 10" and at 1700 your draft was 28' 10" forward and 28' 08" AFT. What quantity of cargo was discharged if the TPI is 70?
5110 tons
233
The deduction of your vessel's freeboard when loading in fresh water is 7.4 in. Find the TPI at summer load draft if the displacement is 15,400 ton.
52 tons
234
A rectangular tank 10 meters long x 8 meters wide x 16 meters deep is loaded with diesel oil of 0.85 relative density. If the ullage is 4.2 meters, what is the outage?
537.6 m3
235
Find the Free Surface Constant (free surface moments) for a tank 70 feet long by 35 feet wide by 25 feet deep. The displacement of the vessel is 35,000 tons. The S.G. of the liquid in the tank is 0.78 and the vessel is floating on a density of 1026 kg per cubic meter.
5446.5 ft-tons
236
Find the moment of statical stability when a ship of 10,450 tons displacement is heeled 6 degrees if the GM is 0.5m.
546.2 ton-meters
237
You are loading logs in fresh water port with a gear rated at 5 tons and suspect the weight of the logs exceed the SWL of the gears. The logs are floating alongside the vessel and have 95 percent of the volume submerged . The average length of the logs is 15 feet and the average diameter is 4.4 feet. What is the nearest average weight of the logs?
6.0 tons
238
Your vessel has a FWA of 10 inches. How much may you submerge your load line if you are loading at a dock where the density is 1010 if you are going at sea (density 1025)?
6.0"
239
A box-shaped vessel floats at a mean draft of 6.60 on departure from a loading port where the density is 1.010 tons/meters. What will be her draft at sea?
6.503 mtrs
240
A vessel with a mean draft of 6.25 m and TPC 43.5 t, what will be her final mean draft after loading 1500 tonnes of cargo?
6.59 Meters
241
A barge 70 meter long, 12 meters wide with a depth of 8 meters has an amidship compartment 15 meters long, filled with cargo whose permeability is 35%. She is on even keel at 6.10 meters. Calculate the draft if this compartment is bilged.
6.60 meters
242
A barge 50 meters long, 9 meters wide with a depth of 8 meters has an amidship compartment 12 meters long, filled with cargo whose permeability is 55%. She is on even keel at 5.75 meters. Calculate the draft if this compartment is bilged.
6.62 meters
243
A vessel with a FWA 350 mm has a draft of 6.50 meters in density 1.025 t/m3. Find its approximate draft when docking to a berth of density 1.005 t/m3.
6.78 meters
244
Your vessel's available cargo capacity is 950 tons and the remaining cubic capacity 29,000 cubic feet. You are to load steel with SF 18 and cotton with SF 52. If you are to load Full and Down, how much of each cargo should be loaded?
600t steel, 350t cotton
245
Find the underwater displacement in sea water of a box shaped vessel of 120m long by 17m beam by 3m draft.
6120 cu m
246
A box shaped vessel with displacement of 20,000 tonnes in fresh water has the following dimensions: Length = 150 m, Breadth = 27 m and Depth = 16 m. Find the volume of the vessel?
64,800 cu. meters
247
The displacement of your ship is 8,000 tons on salt water. The DBT measures 20 meters long x 16 meters wide, partly loaded with sea water. Calculate the free surface constant.
6997.33 meter-tons
248
The displacement of of your vessel is 10,555 tonnes. Her lenht is 120 meters and a breadth of 16 meters. She is floating in a water of density of 1.020 tonnes/cubic meter. Find her draft, if the calculated block coefficient is 0.77.
7 meters
249
A rectangular tank on a tanker is 21 meters long, 26 meters wide and 18 meters deep. Mean draft is 15 meters. How much oil of relative density 0.84 does it contain if the ullage is 2.6 meters?
7,063.1 tons
250
What is the area of a triangle with a base of 3.5 feet and a height of 4.0 feet?
7.0 sq. Ft.
251
A vessel with a FWA 350 mm has a draft of 6.80 meters in density 1.025 t/m3. Find its approximate draft when docking to a berth of density 1.005 t/m3.
7.004 meters
252
What distance will a weight of 150 tons have to be moved in order to remove a 2° list from a vessel? Displacement is 9,000 tons and GM is 3.4 feet.
7.12 feet
253
Your vessel displaces 4,500 tonnes and has a KG of 8 meters. She loads, 2,300 tonnes with a center of gravity of 5.5 meters above the keel. What is the new KG?
7m 9s
254
A ship has a mean draft of 7.36 m in water relative density of 1.015. Her TPC in salt water is 42.10 tonnes. What will be her new draft after discharging 631 tonnes of ballast water?
7.21 Meters
255
A box-shaped vessel of 60 meters long and 12 meters wide is loading in sea water. How many tons is required to increase or decrease her mean draft by one centimeter?
7.38 tons
256
Find the deduction in your vessel's freeboard, expected to load cargo in fresh water. Your vessel's displacement isn 15,400 tons and Tons Per Inch Immersion (TPI) at her summer draft is 52 tons.
7.4 inches
257
A vessel has a displacement of 16,000 tons, TPI is 54. Find her fresh water allowance.
7.40 inches
258
Your vessel's summer draft is 7.65 meters. Calculate her Winter draft.
7.49 meters
259
Your vessel's summer draft is 7.65 meters. Calculate her Tropical draft.
7.81 meters
260
Preparing to move on a location, you find that you must remove 450 tons of drill water. With a VCG of 8 feet, to enable you meet the draft limitations. You started with a displacement of 17,000 tons and a KG of 69 feet. What is the KG after pumping out the drill water?
70.66 feet
261
You are to load lead, SF 18 and cotton, SF 78. The available deadweight capacity is 1,100 tons of cargo and cubic capacity is 43,800 cu. ft. Disregarding broken stowage, how much of each cargo should be loaded to make her Full and Down?
700t lead, 400t cotton
262
A ship is floating in dock water of density 1015 kg per cu.m. Find the change in draft when she passes from dock water to salt water if her FWA is 180 mm.
72 mm
263
At the commencement of loading at 0800H, draft fwd was 4.30 meters, aft 4.50 meters. The stevedores worked continuosly till 1800H, at which time drafts were read as follows: fwd 4.65 meters aft 4.75 meters. If the TPC at this draft is 25, what is the rate of loading per hour?
75 tons per hour
264
A vessel floating in sea water displaces 21,550 long tons. What is the displacement?
754,250 cubic feet
265
A ship is floating at a draft of 6.8 m in FW. If her maximum FW draft is 7.0 m, and her TPC at SW is 40, find her DWT available.
780.48 tons
266
A rectangular tank on a tanker is 21 meters long, 26 meters wide and 18 meters deep. The mean draft is 14 meters. How much oil of relative density 0.84 will it hold if filled to 97% capacity?
8,007.8 tons
267
In a vessel of 7,850 tons displacement, KG is 8.4 m, 150 tons of cargo is loaded on the UD (KG 10 m). Find the final KG.
8m 25s 800ms
268
Twenty-five hundredd (2500) tons of iron ore with a stowage factor 17 is stowed in a cargo hold. The dimensions of the hold are 55 feet long and 45 feet wide and 35 feet deep. What is the height of the center of gravity of the ore above the bottom of the hold?
8.6 feet
269
Your vessel, with a beam of 100 feet has an average rolling period of 15 seconds. What would her metacentric height be?
8.6 feet
270
A vessel with the following corrected drafts: Fwd 8.5122 m, Aft 8.7515 m and Mid 8.6018 m. Find the quarter means.
8.6093 Meters
271
A log weighing 9.0 tonnes is floating in water density of 1.023 t/m3. Calculate what volume of water does it displaced.
8.798 cu.m.
272
Your present mean draft at the loading port is 7.80 mtrs. A cargo of 2,700 tons remains to be loaded. If the TPC at this draft is 23, what would be your mean draft after all the cargoes have been loaded?
8.97 mtrs
273
A ship displaces 6,800 t0ns and is listed 8 degrees to stbd. Her KG is 6.15 meters and her KM is 7.20 meters. Calculate the weight of cargo to load into the port wing of the hold, at a distance of 12 meters from the centerline, in order to make the vessel upright.
83.6 tons
274
What is the bodily sinkage of a box-shaped vessel 80m x 14m floating at an even keel draft of 4 meters, if an empty midship DB tank is bilged 16m x 14m x 2m?
84m
275
A tank is loaded with 9,000 barrels of gasoline. The temperature of the product is 90°F and it has a coefficient of expansion of 0.0008. What is the net amount of cargo loaded?
8784 bbls
276
Find the rolling period of a vessel with a GM of 6 feet and beam of 50 feet.
9 seconds
277
A vessel has a mean draft of 8.98m in salt water, displacement of 23,894 tons, TPC of 31.44 and FWA of 19 cm, what will be the mean draft in FW?
9.17 meters
278
The mean load draft of the vessel is 9.4 m in salt water. What should be her draft between loading in dock water of density 1008 kg/cubic meter?
9m 33s 600ms
279
A barge of 70 meters long and 14 meters wide is loading in fresh water. How many tons is required to increase or decrease her mean draft by one centimeter?
9.8 tons
280
A vessel is preparing to enter a dry dock and has a 5° list to starboard. The displacement of the vessel is 8,250 tons with a GM of 4.5 feet. How many tons of fuel oil must be pumped from the starboard double bottoms to the port double bottoms to remove the list?
92.8 tons
281
A vessel fitted with deep tanks with a capacity of 1,000 tons of fresh water. What quantity of peanut oil with specific gravity of 0.92 could be carried in such tanks?
920 tons
282
A tank containing olive oil of relative density 0.87 is 12 meters long x 10 meters wide x 14 meters deep. At the start of discharging operation, the ullage was one meter. After an hour, the same tank had an ullage of 1.9 meters. How much oil was discharged?
93.96 tons
283
A vessel of 7,300 tons is listing 9 degrees to port. Her GM is 0.75 meter. Calculate the weight of ballast that should be pumped into the DBT stbd, a distance of 9 meters off the centerline to make her upright.
96 tons
284
The light ship condition is:
A condition prior to loading cargo, fuel, water, and stores
285
A righting arm is:
A distance
286
The yawing motion of he vessel is more likely to occur with:
a following sea
287
A quick and rapid motion of a vessel in a seaway is an indication of a(n) __________.
a large GZ
288
If the center of gravity of a vessels is off the centerline, the vessel will have:
a list
289
A semi submersible which will not remain upright and will assume a list either to port or starboard is likely to have:
A negative GM
290
A vessel which will not remain upright and will assume a list either to port or starboard is likely to have:
a negative GM
291
A slow and easy motion of a vessel in a seaway is an indication of what condition?
a small GZ
292
During cargo operations, your vessel has developed a list due to the center of gravity raising above the transverse metacenter. To correct the list, you should:
add weight in the lower holds or double bottoms
293
During cargo operations, your vessel has developed a list due to the center of gravity rising above the transverse metacenter, to correct the list, you should _____.
Add weights on the lower hold or double bottom.
294
A fresh water correction is usually listed on the ship's capacity plan. This correction gives the _____.
Additional draft that a ship may add to her Plimsol marks when loading in fresh water
295
During loading of dangerous goods a package is dropped. Despite damaging the packaging the product can be clearly seen and is not damaged. What should be done?
Advise the Master
296
Damage stability of a vessel is the stability ______.
after flooding
297
Damage stability is the stability:
after flooding
298
Your ship has commenced to experience syncronous rolling. To correct this situation assuming you are underway, you could:
All of these
299
A tender vessel has:
all of these
300
A ship's forward draft is 22'-04' and its after is 23'-00". The draft amidships is 23'-04". This indicates a concentration of weight:
amidships
301
A vessel's bottom will be subjected to tension when weight is concentrated:
Amidships
302
The effects of free surface on a vessel's initial stability do NOT depend upon the ____.
Amount of fluid in slack tanks
303
Which of the following does not effect free surface?
amount of liquid in the tank
304
The effects of free surface on vessel's initial stability do not depend upon the:
amount of liquid in the tanks
305
An intact buoyancy means:
An intact space below the surface of the flooded area
306
Intact buoyancy is:
an intact spaces below the surface of the waterline
307
Initial stability of a vessel may be improved by:
Any of the above
308
When a floating body submerged in the water, the water displaced is equal to its own weight This is known as ________?
Archimedes principle
309
What is the area of w waterplane using Simpson's 2nd Rule. The common interval is 15 feet and the ordinate are: 0; 9; 13.3; 14.7; 12.8; 7.5; 0.6 ft.
Area = 887.6
310
Your vessel has ran aground on the edge of a channel. Which of the following would be the most prudent action to take in order to refloat your vessel?
Arrange to have a barge lighten up your deck load.
311
The center of buoyancy and the metacenter are in the line of action of the buoyancy force:
at all the times
312
For a floating vessel, the center of buoyancy and the metacenter are in the line of action of the buoyancy force:
at all times
313
The center of buoyancy and the metacenter are in the line of action of the buoyant force:
at all times
314
The righting moment is zero:
at the angle of loll
315
As a vessel inclines to 3° which of the following moves toward the low side? Assume inclination due to rolling.
B
316
In a small angle stability theory, the metacenter is located at the intersection of the inclined vertical centerline and a line through:
B
317
In small angle stability theory, the metacenter is located at the intersection of the incline vertical centerline and a vertical line through:
B
318
The vessel will ____________if the metacentric height is large.
Be stiff
319
If the metacentric height is large, the vessel will :
Be stiff
320
If the metacentric height us large, a vessel will:
be stiff
321
A vessel with a large GM will:
be subject to severe racking stresses
322
A vessel with a large metacentric height will:
be subject to severe racking stresses
323
The vessel will ____________ if the metacentric height is small.
Be tender
324
If the metacentric heights is small, the vessel will :
Be tender
325
The moment at any pointing a ship's structure that tends to produce sagging or hooging is:
Bending
326
The moment of any point in a ship's structure that tends to produce sagging or hogging is:
bending
327
The ratio of volume of displacement to a block having length, breadth and draft of vessel is known as ______.
block coefficient
328
Your vessel is damage with no list, but down by the stern. There is progressive flooding and trim by the stern is increasing. What is the effect on transverse stability after the deck edge at the stem is submerged?
BM decrease rapidly due to loss of water plane area
329
A stabilogauge is a calculator used to measure: I. GM II. Initial stability
Both I and II
330
The amount of freeboard effects which of the following? I. Amount of reserve buoyancy of a vessel II. Range of stability of a vessel
Both I and II
331
The most important figure in the calculation of free surface for a tank carrying liquid is:
Breadth
332
What is the most important figure in calculating the free surface content of a tank carrying liquid?
breadth
333
Which of the following is the most significant dimension of the ship wen calculating kM?
Breadth
334
The vertical component of hydrostatic pressure acting upwards is termed ____?
Buoyancy
335
The point through which the vertical upward support in a floating vessel, is assumed to act is known as the center of:
Buoyancy
336
The upward pressure of displaced water is called:
Buoyancy
337
Stability is determined by the relationship of the center of gravity and the:
center of buoyancy
338
Stability is determined principally by the location of the center of gravity and the:
center of buoyancy
339
The center of volume of the immersed portion of the hull is called the:
center of buoyancy
340
The center of volume of the immersed portion of the hull is called the:
Center of Buoyancy
341
The geometrical center of the waterplane and the point about which the vessel trims is the _____.
Center of flotation
342
A vessel lists and trim about the:
Center of flotation
343
A vessel lists and trims about the:
Center of Flotation
344
A partially full tank causes a virtual rise in the height of the _____.
Center of gravity
345
Stability is determined principally by the location of two points in a vessel: the center of buoyancy and the:
Center of gravity
346
The existence of liquids in partially full tanks or compartments of a vessel causes a virtual rise in the height of the:
center of gravity
347
The virtual height of the _______ above the keel depends upon the displacement and deadweight of the vessel.
center of gravity
348
Center of Flotation is defined as:
Center of gravity of waterplane
349
If a vessel has list but maintains a regular rolling period, the vessel has _____.
Center of gravity off center
350
The difference between the initial trim and the trim after a loading is known as:
change of trim
351
The difference between the initial trim and the trim after a loading change is known as:
change trim
352
Loadline markings are set by what authority?
Classification societies
353
If a vessel is loaded in such a manner that she is said to be sagging, what kind of stress is placed on the steer strakes?
compression
354
When a vessel is hogging the keel will be in:
compression
355
When a vessel is stationary and in a hogging condition, the main deck is under:
compression stress
356
How would you make the rolling of a stiff vessel comfortable?
concentrate weight on upper wing tween deck
357
Which technique could be used to give a more comfortable roll to a stiff ship?
Concentrate weights in the upper tween deck wings
358
Which factor does NOT affect the required freeboard of a cargo vessel?
Condition of trim in normal operation.
359
Repairing damage to the hull of a vessel at or above the waterline reduces the threat of:
continued progressive flooding
360
It is formed by two equal forces acting on a body in opposite directions and along parallel lines.
Couple
361
The stability which exist after the unintentional flooding of a compartment on a vessel is called :
damage stability
362
The weight of a vessel's cargo, ballast, fuel oil, fresh water including her constant and measured in tons is called ______?
Deadweight
363
The weight a vessel can carry is called the ____.
Deadweight
364
The total weight of cargo, fuel, ballast, fresh water, etc., on board at present.
Deadweight aboard
365
Your vessel is very stiff. Which of the following would you consider in order to give her an easier ride?
deballast deep and double bottom tanks
366
The strength of a deck will be increased by adding :
deck beam brackets
367
The angle of maximum stability corresponds approximately to the angle of:
Deck edge immersion
368
For a vessel with list, an increase in GM Transverse will cause the inclination to __________.
Decrease
369
For a vessel with trim, an increase in GM Transverse will cause the inclination to _______.
Decrease
370
As the displacement of a vessel increases, the detrimental effect on free surface will _____.
Decrease
371
When displacement increases, the free surface corrections for slacks tanks:
Decrease
372
You could expect free surface effects to _____ as the vessel's inclination is increased due to pocketing.
Decrease
373
Flooding of any compartment in a ship that results in serious loss of reserve buoyancy will always ______.
decrease heeling moment
374
A vessel going from salt water to fresh water would ______.
Decrease her freeboard
375
A vessel going from salt water to fresh water would:
decrease her freeboard
376
If the cause of listing or trim is off-center ballast, counter flooding into empty tanks will _______.
Decrease list or trim
377
If the cause of severe list or trim is off-center ballast, counter flooding into empty tanks will:
decrease list or trim
378
If the cause of severe list or trim is off-center ballast, counterflooding into empty tanks will:
decrease list or trim
379
If your vessel is trimmed by the head and you shift 300 tons from your forepeak to the after peak. What effect will this have on your vessel?
Decrease of trim by the head
380
A serious loss of reserve buoyancy resulting from flooding any compartment of a ship will always:
Decrease ship stability
381
The vertical shift of weight to a position above the vessel's center of gravity will:
decrease the righting moments
382
As the displacement of a vessel increases, the detrimental effects of free surface:
Decreases
383
As the beam of a vessel for a given length increases, it is apparent that directional stability :
Decreases
384
If a vessel takes a sudden, severe list on trim an unknown cause, you should first:
determine the cause before taking countermeasures
385
The purpose of the inclining experiment is to _____.
Determine the lightweight center of gravity location
386
The effect of free surface on initial stability depend upon the volume of displacement of the vessel and the:
dimensions of the surface of the free liquids
387
Your vessel wishes to maintain her draft from salt water to fresh water. You should:
discharge ballast
388
Which of the following operations may cause pressure in an inerted tank to fall belwo prescribed limit?
Discharging
389
To get the bow up is the first consideration when you are:
discharging oil cargo
390
Which of the following will increase the height of center of buoyancy of your vessel?
discharging weight from the lower deck
391
The actual weight of a vessel and her contents at any particular time and expressed in tons is termed as:
Displacement
392
The free surface correction depends upon the dimensions of the surface of the free liquid and the _____.
Displacement of the vessel
393
A vessel's LCG is determined by:
dividing the total longitudinal moment summations by displacement
394
The change in trim of a vessel may be found by:
Dividing the trim moments by MTI
395
The change of trim of a vessel may be found by:
Dividing the trimming moments by MTI
396
In general the location of "B" depends on vessel what?
Draft
397
The height of the metacenter above the keel will vary depending on the __________.
draft and beam
398
A vessel trimmed by the stern has a:
drag
399
The work done in inclining a vessel as in the inclining experiment is called ______.
Dynamic stability
400
It is the measure of the work done when the vessel is inclined due to external forces.
Dynamical stability
401
What effect does flooding a compartment have on the effective water plane of a vessel? I. The moment of inertia of the water plane is reduced II. The total effective water plane area is reduced
Either I or II
402
Assuming an oven transverse distribution of weight in a vessel, which condition could cause a list?
empty double-bottom and lower holds, and a heavy deck cargo
403
To reaffirm their safe working load, how often should cargo booms be weight-tested by Classification Society ?
Every Four years
404
Which of the following statements about a vessel's stability while drydocking is true?
Every ton of weight bearing on the block acts as if a ton of weight was remove at the keel level
405
Which increase in temperature the volume of flammable and combustible liquids:
expands
406
The present drafts of a ship 140m long are 8.1m fwd and 9.9m aft. TPC = 30, MCTC = 250 tonnes-meter, COF = 3m fwd. 300 tonnes ballast was pumped out of No. 5 DB tank, 50m abaft amidships. Find the new drafts fwd and aft.
F = 8.29m / A = 9.49m
407
In order to improve stability, which of the following should be done?
fill in ballast
408
If your vessel has a list to port due to negative GM and off-center weight, the first corrective measure you should take is:
fill the starboard double-bottom
409
If the buoyant force on ship's hull is equal to the displacement tonnage, the ship will:
float
410
What do you call the length of the space, at any point of a ship, having its center at that point, which can be flooded without causing the ship to sink?
Floodable Length
411
In which case may meta centric height be considered an indication of a vessel's stability?
For small angles of inclination
412
What do you call the effect of the "movement of liquid" in a slack tank?
Free surface effects
413
Which of the following may be an indication of reserve buoyancy?
Freeboard
414
The vertical distance top to top between the load line marks "S" and "F" is the:
fresh water allowance
415
Which of the following is not found in the deadweight scale?
fresh water allowance
416
The Dock Water Allowance is calculated as a proportion of the:
Fresh Water Allowance
417
The center of buoyancy is located at the:
geometric center of the displaced volume
418
When discharging an oil cargo, the first consideration is to ___.
Get the bow up
419
A ship has a displacement of 6,500 tons and a GM of 0.19 meter. A weight of 340 tons is loaded on deck with a center of gravity of 6 meters above that of the ship. Find the GM after loading and the angel of loll if any. BM = 3.8 meters.
GM = (-) 0.11 meter / 13.53 degrees
420
A ship has a displacement of 4,500 tons and a GM of 0.16 meter. A weight of 270 tons is loaded on deck with a center of gravity of 5 meters above that of the ship. Find the GM after loading and the angel of loll if any. BM = 4.1 meters.
GM = (-) 0.12 meter / 13.6 degrees
421
If you shift fuel oil so that the trim and KG of the ship remains the same but free surface correction for the fuel oil tanks are reduced, what will happen to the GM?
GM is increased
422
If we shift fuel oil so that the trim and KG of the ship remain the same but free surface correction for the fuel oil tanks is reduced, what happens to the GM?
GM is increased
423
The volume of under deck tonnage plus spaces in the hull above the tonnage deck divided by 100 cubic feet or 2.83 cubic meter to indicat one measurement ton is termed as _______?
Gross tonnage
424
Preservation of reserved buoyancy is the most important consideration with vessels that:
has been damaged
425
A vessel which is subjected to "sagging":
has its bottom plating under tensile stress
426
If a vessel has a list but maintains a regular rolling period, the vessel:
has unsymmetrical weight distribution
427
A vessel will have a greater degree of heel caused by rudder action when it:
has very little stability
428
A vessel with a small GM will:
Have a smaller amplitude of roll in heavy water
429
What do you call the vertical bodily motion of the vessel?
Heaving
430
What do you call the transverse inclination of the ship, caused by external forces such as wind, waves, centrifugal force during course alterations, over-tight moorings in port, etc.?
Heel
431
Wind and seas has caused a difference between drafts on the starboard and port, this difference is _______.
Heel
432
The difference between the starboard and port drafts due to wind or seas is called:
heel
433
When initial stability applies, the height of the center of gravity plus the metacenter height equals the:
Height of the metacenter
434
When initial stability applies, the height of the center of gravity plus the metacentric height equals the:
Height of the metacenter
435
This is a kind of stress where the fore and aft ends of the vessel bends downward brought about by increased buoyancy forces being created at and around the midship section of the vessel.
Hogging
436
You vessel has a midships engine room and the cargo is concentrated in the end holds. The vessel is:
hogging with tensile stress on main deck
437
Your vessel has a midships engine room and the cargo is concentrated in the end hold. The vessel is:
hogging with tensile stress on main deck
438
What is the term used when a cargo of the same density throughout ?
Homogeneous cargo
439
The instrument that measures the density of any liquid is called a ______?
Hydrometer
440
The value of KM at any draft can be taken from the:
Hydrostatic Properties Table
441
The KM of a vessel can be determined by the ship's officer from: I. The ship's stability booklet II. The ship's capacity plan
I
442
The natural rolling period of a vessel increases when :
ice accumulates above deck
443
Center of buoyancy by its definition can be considered: I. The centroid of the displayed volume II. The resultant of all vertically upwards forces of buoyance
II only
444
A vessel is "listed" when it is:
inclined due to an off-center weigth
445
A vessel is "listed" when it is ___.
inclined due to off-center weight
446
A vessel is "listed" when it is:
inclined due to off-center weight
447
If the trim and KG of the ship will remain but free surface correction for the fuel is reduced, what happens to the GM?
Increases
448
The vertical distance between G and M is used as a measure of _______?
Initial stability
449
The stability of the vessel at small angels of inclination of up to 15 deg, wherein the GM or metacentric height is used as measure.
initial stability
450
The vertical distance between the center of gravity and the metacenter of a vessel is used as a measure of:
initial stability
451
Metacentric height is a measure of:
Initial stability only
452
An intact space which can be flooded without causing the ship to sink is known as:
intact buoyancy
453
The down flooding angle is the maximum angle at which:
intact stability curves are valid
454
Which statement is true of a tender ship?
It has a very low center of gravity
455
What does the term "relative or specific gravity" mean?
It is density of sea or salt water
456
The jettisoning of topside weight from a vessel serves what purpose?
It lowers the center of gravity
457
Which of the following is true of a "stiff" vessel?
Its period of roll is short
458
Your vessel is listing 4 degrees to port and has short rolling period. There is loose firefighting water in the hull. The ship is trimmed down by the head with one foot of freeboard at the bow. Which action should you take first?
Jettison the anchors and anchor cables
459
Signs of racking stresses generally appear at the:
junction of the frames with the beams and floors
460
Hydrostatic data is being used to find the KM of the vessel and then:
KB
461
The purpose of inclining experiment is to determine:
KG
462
For a given displacement, the righting arm has its maximum value when:
KG is minimum
463
In an upright vessel that has a negative GM, the GM becomes positive at the angle of loll because the:
KG is reduced as the vessel seeks the angle of loll
464
Another expression for height of transverse metacenter is:
KM
465
The distance that the transverse metacenter is above the keel is designated as:
KM
466
When a vessel is floating upright, the distance from the keel to the meta center is the:
KM
467
Although KG for some vessels in lightweight condition is relatively high, the vessel is stiff because:
KM is high
468
A ship has a quick hard roll. The ship's stability is:
Large GM
469
A quick and rapid motion in seaway in an inclination of a(n);
large GM
470
A moment is obtained by multiplying a force by its:
Lever arm
471
A moment is obtained by multiplying a force by its:
lever arm
472
When planning the loading of a VLCC, what is the most important consideration?
Limits of the bending moments
473
The difference between the starboard draft and port draft caused by shifting a weight transversely is called a:
list
474
Container vessels are fitted with cell guides in the cargo holds and in newer ships, sometimes on deck. What is the most important factor to consider while loading containers?
list of the vessel
475
For a vessel with transverse inclination, an increase in GM Transverse causes __________.
List to decrease
476
Regulations concerning the stowage, lashing, and securing of timber deck cargoes aboard general cargo vessels may be found in the :
Load Line Regulations
477
How do you describe a TENDER vessel?
Long rolling period
478
The most effective way to limit free surface would be to increase the number of:
Longitudinal bulkheads
479
When the longitudinal strength members are continuous and closely spaced, the vessel is:
Longitudinally framed
480
When a vessel is heeled, due to a shift of cargo, the area below the heeling arm curve represents:
Lost stability
481
An unstable upright equilibrium position on a vessel means that the metacenter is:
Lower than the center of gravity
482
An unstable upright equilibrium position on a vessel means that the metacenter is:
lower than the center of gravity
483
What loadl ine mark is a line 1/48th of the lumber summer draft above the lumber summer load line?
Lumber tropical load line
484
Topside icing that blocks freeing ports and scuppers:
may decrease stability by increasing free surface effect due to water on deck
485
In a small -angle stability, external forces exist, the buoyant force is assumed to act vertically upwards through the center of buoyancy and through the:
Metacenter
486
In small-angle stability, when external forces exist, the buoyant force is assumed to act vertically upwards through the center of buoyant and through the:
metacenter
487
The point to which the G may rise and still permits to have a positive stability is the ______.
Metacenter
488
KM minus KG equals what?
Metacentric height
489
The difference between the height of the metacenter and the height of the center of gravity is known as the:
Metacentric height
490
The horizontal distance between the vertical lines of action of gravity and the buoyant forces is called the:
Metacentric height
491
When a weight is shifted down, which of the following takes place?
metacentric height increase
492
The original equilibrium position is stable when:
Metacentric height is positive
493
Which will be a result of removing deck-stowed containers?
Metacentric height will increase
494
When carrying a cargo of logs, loading the heaviest logs in the lower holds will have what effect?
Minimize the effects of a tender vessel
495
If a vessel is carrying timber on the exposed deck it is considered that the deck cargoes affords ______ buoyancy.
More
496
If a vessel lists to the port side, the center of buoyancy will:
Move to port
497
When a vessel is inclined at a small angle, the center of buoyancy will:
Move toward the low side
498
When a vessel is inclined at a small angle, the center of buoyancy will:
move towards the low side
499
Transverse moment of a load is obtained by:
multiplying the weight by the distance of its center of gravity from the centerline
500
The movement of a liquid in a tank when a vessel inclines, causes an increase in _______?
Natural rolling period
