Ship Construction Flashcards
A filled water ballast tank when ship is in salt water has a permeability of:
0%
An empty compartment has a permeability of:
100%
The effectiveness of a welded joint is considered how many percent?
100%
Cargo booms must be tested to rectify SWL every _____ years.
5
You are loading a cargo of cases into a hold which has a bale cubic of 44,000. The cargo consists of cases measuring 4 ft x 2 ft x 1.5 ft. Estimated broken stowage is 15%. What is the maximum number of cases which can be stowed in the hold?
3116
You are loading a cargo of canned goods with a stowage factor of 65. If you allow a 15% broken stowage, how many tons can be loaded in a space of 55,000 cubic feet?
719 tons
What is the stowage factor of a commodity whose density is 15 lbs. per cubic foot?
149 cu. ft/ton
A cargo of canned foodstuff is packed in cartons. Each carton is 36 cubic feet and weighs 340 pounds. What is the stowage factor of the cargo?
237 ft3/ton
The summer load line upper edge to the upper edge of the winter load line is:
¼ inch per foot of the Summer Draft
The Winter North Atlantic marked WNA is at a distance of 50 mm below the mark W and is required only on ships of what length?
100 m or less
In the transverse framing system, frame spacing is generally not more than ____ but is always reduced in the pounding region and in the peak tanks regions.
1000 mm
Draft markings in the metric system are written in intervals of _______?
10mm
The inside radius of the Plimsoll mark from the upper edge of the horizontal line through the ring.
125 mm
How many cubic feet of space is required to stow 815 tons of a cargo with a stowage factor of 15? (estimated broken stowage is 10%).
13,583 cu.ft
Gross tonnage is measured at _____?
2.83 cu.meters per measurement tons
How many cubic feet of space is required to stow 775 tons of a cargo with a stowage factor of 25? (estimated broken stowage is 15%).
22,794 cu.ft
How many cubic feet of space is required to stow 950 tons of a cargo with a stowage factor of 22? (estimated broken stowage is 12%)
23,750 cu.ft
What is the inside diameter of the ring?
250 mm
Draft markings in the metric system are written in _____ thickness?
25mm
What must the outside diameter of the ring be?
300 mm
Your vessel has a deadweight capacity of 5,000 tons and a cubic capacity of 300,000 cubic feet. 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
What is the length of the horizontal line drawn through the center of the disk?
450 mm
Periodic surveys to renew the load line assignment must be made at interval of NOT more than how many years?
5 years
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 factor of 20%?
565 tons
A cargo compartment filled with grain has a permeability of about:
60-85%
You will be loading bales of wool having a stowage factor of 100 in #3 lower hold which has a bale cubic capacity of 72,000. How many tons of the wool can be stowed in the compartment, assuming 10% broken stowage?
648 tons
You will be loading bales of wool having a stowage factor of 95 in #3 lower hold which has a bale cubic capacity of 85,000. How many tons of the wool can be stowed in the compartment, assuming 12% broken stowage?
787 tons
You will be loading bales of wool having a stowage factor of 80 in #3 lower hold which has a bale cubic capacity of 76,000. How many tons of the wool can be stowed in the compartment, assuming 15% broken stowage?
808 tons
Oil tanker design rules require that petroleum cargo tanks are separated from accommodation by:
a cofferdam
What is a dog?
A device to force a watertight door against the frame
Another name for the “garboard strake” is the:
A strake
Which plan would you refer to locate the second mate’s cabin?
accomodation plan
An imaginary line drawn perpendicular to the waterline where the edge of the rudder post meets the summer loadline is called:
Aft perpendicular
It is a watertight compartment between the aftermost watertight bulkhead and the stern.
After peaks
In heavy weather, you notice buckling in the midships deck plating of your vessel. To relieve the strain, you could:
all of the above
What additional fittings may be needed to facilitate efficient securing of deck cargoes? Where and how should they be installed?
All of these
Ship’s officers should check every cargo compartment after it has been filled with bulk grain to ensure:
all void spaces are filled
The purpose of sheer in ship construction is to:
Allow the ship to ride waves with drier decks
Vessels that are constructed with solid bulwarks have freeing ports installed. What is the purpose of having this installation?
Allow water which may be shipped on deck to flow off rapidly
The point that is halfway between the forward and after perpendicular and is the reference point for vessel construction.
Amidship
A vessel’s bottom will be subjected to tension when weight is concentrated which part of the vessel?
Amidship
A vessel’s bottom will be subjected to tension when weight is concentrated:
Amidships
In ship construction, keel scantlings should be the greatest:
Amidships
Weight concentration in which area will cause a vessel’s double bottom to be subjected to tension stresses?
Amidships
Weight concentration in which of the following areas will cause a vessel’s bottom to be subjected to tension stresses?
amidships
The center of the ring of the load line mark is to be placed:
amidships, mid-length between perpendiculars
A process used in steel products there is uniform heating of the material and then allowing it to cool slowly.
Annealing
To obtain correct positions for the blocks when drydocking a vessel, you would consult?
Any of the above
The ratio of the height of a vessel’s rudder to its width is referred to as the _______.
aspect ratio
What type of rudder may loose its effectiveness at angles of 10 or more degrees?
balance
These are rudders that have a larger area forward of the axis or 25-30 percent more.
Balance rudders
The ship hull at sea, being exposed to the sea and the cargo will act like a beam, the _____ stresses acting on the hull will normally have its maximum at the middle of the ship, when the ship is a homogeneous full load condition.
Bending
Additional _________ are necessary for support when a vessel drydock with the cargo on board.
Bilge corner
When a vessel drydock with the cargo on board, additional _________ are necessary for support.
Bilge corner
It is a flat keel construction that aids in the resistance of a vessel to roll and fitted along either side of the ship.
Bilge keel
They are projecting bulk and angle bars fitted at the turn of the bilge, the purpose of which is to reduce the rolling of the vessel.
bilge keels
The vertical fittings of iron or steel, iron or wood securely fixed and adequately strengthened on board for taking mooring ropes, towing ropes, etc. are called _____.
Bitts
The ratio of volume of displacement to a block having length, breadth, and draft of the vessel is known as _____.
block coefficient
It is plan which shows an endwise view of the ship’s molded form where the transverse frame section of the ship at various stations are drawn.
Body plan
This plan shows an endwise view of the ship’s molded form where the transverse frame sections of the ship at various stations are drawn.
body plan
The floors in a vessel’s hull structure are kept from tripping or folding over by _________.
bottom longitudinals
A vessel subject to sagging has _____.
Bottom plating under tensile stress
That part of the ship that cuts the water forward is called the:
bow
To rigidly fasten together the peak frames, the stem and the outside framing, a horizotal plate is fitted across the forepeak of the vessel. This plate is known as a(n):
breast hook
A flanged plate fitted over an air port on the ship’s outside shell to prevent water from entering the port is a:
brow
Metal plates that cover the top of the hawsepipe are called ____.
buckler plates
Metal plates used to secure the top of the hawse pipe to prevent water from passing through are called:
buckler plates
Vessels operating at higher speeds and those with high block coefficients are often fitted with ____.
Bulbous or protruding bow
It is the deck up to which all main transverse and watertight bulkheads are carried.
bulkhead deck
The vertical divisions arrange in the ships superstructure are known as:
Bulkheads
Freeboard is measured from the upper edge of the:
Bulwark
The most efficient method of joining two plates in the same plane is by means of:
Butt weld
Flush constructed vessels are joined to the shell plating by ____?
Butt welds
The welds used to join shell plates in flush construction are known as _______.
butt welds
Shell plating provides the greatest contribution to the longitudinal strength of the ships structure, they are arranged in fore and aft direction and welded together. These vertical welds are called:
butts
When riveted joints found at the ends of plating they are called __________.
Butts
It is the curvature of the decks in the transverse direction and measured as the height of deck at center above the height of deck at side.
Camber
What term indicates the transverse curvature of the deck?
Camber
The vertical barrel working on a vertical spindle, operated by electric or hydraulic machinery, that is used for heaving mooring ropes or chain cable is called _____.
Capstan
When measuring gross tonnage, which space(s) is(are) NOT exempt ?
Cargo holds
As the propeller turns, voids are formed on the trailing and leading edges of the propeller blades causing a low in propulsive efficiency, pitting of the blades, and vibration. These voids are known as:
cavitation
The forming and bursting of vapour filled cavities or bubbles and occurs as a result of pressure variations on the back of the propeller blade, is called:
Cavitation
Loadline markings are set by what authority?
Classification societies
A deck fitting, used to secure line or wire rope, consisting of a single body with two protruding horns is called a :
Cleat
It is a void or empty space between two bulkheads or floors which prevents leakage from one to the other.
Cofferdam
What do you call the foremost major watertight bulkhead?
Collision bulkhead
What is the foremost major watertight bulkhead called?
collision bulkhead
Which cargo plan would you refer to show the ship’s profile and uses block spaces with the name of each commodity carried?
commodity stowage plan
If a vessel is loaded in such a manner that she is said to be sagging, what kind of stress is placed on the sheer strake?
Compression
When a ship sags, ________ stresses are set up in the deck.
Compressive
It is a type of propeller in which the blades are separately mounted on the boss and in which the pitch of the blades can be adjusted or reversed.
Controllable pitch propellers
What do you call the correction to be applied if the draft markings are not exactly in the perpendiculars?
Correction due to trim
In older ships, bell shaped fitting serving as deck opening to ventilation ducts is called:
cowls
The system of valves and cargo lines as the bottom piping network of a tanker that connects one section of cargo tanks to another sextions is called a _______.
Crossover
The __________ ensures adequate resistance to any pounding stresses which may occur and are fitted with solid plate floors at every frame space and a heavy centerline girder is fitted below each decks in the stern.
Cruiser stern
It is a report made when cargo sustained damage during the loading process.
Damage report
The inward curvature of the ship’s hull above the waterline is called:
deadrise
The actual weight of a vessel’s cargo, ballast, fuel oil, fresh water including her constant and expressed in tons is termed:
Deadweight
The cargo carrying capacity of a vessel is indicated by:
deadweight
This provides a method for estimating the additional draft or determining the extra load that can be taken on board when a vessel is being loaded in water of less than that of salt water.
Deadweight scale
The vertical distance from the upper edge of the deckline to the center of the disk of the loadline mark is known as _______.
deck
The deck plating are placed on a foundation that runs athwarthship from side to side of the vessel. This is the:
deck beam
The strength of the deck will be increased by adding _______.
Deck beam brackets
Adding which of the following will increase the strength of the deck?
deck beam brackets
In order to determine the weight capacity of a deck in a cargo hold, you must refer to the:
Deck capacity plan
To determine the weight capacity of a deck in a cargo hold, you would refer to the:
deck capacity plan
The horizontal platform which completes the enclosure of the hull and provide a solid working platform and acts as the watertight top cover to the hull structure:
Decks
When considering a vessel’s stability which spaces in a general cargo vessel are the best locations for the carriage of bulk grain?
Deep tanks
The plimsoll mark on a vessel is used to:
determine the vessel’s freeboard
Which is part of the ground tackle?
Devil’s claw
The height of the metacenter above the keel will vary depending on the:
displacement and deadweight of the vessel
The distance between the bottom of the hull and the waterline is called:
Draft
Limber is a term associated with:
drainage
The term “limber” is used with :
drainage
Which of the following terms is associated with “limber”?
drainage
Your vessel will be belt-gauged while in dry dock. This process involves:
drilling or sonic testing the hull to determine plate thickness
These are provided in the double bottoms of some vessels, these run from forward of the engine room bulkhead to the collision bulkhead and utilized to carry the double bottom piping.
Duct keel
The body plan of a vessel is a/an:
Endwise view of the ship’s molded form
The immersed body of the ship’s forward of the parallel middle body is called:
Entrance
What term indicates the immersed body of the vessel forward of the parallel mid-body?
Entrance
In order to strengthen the deck of a vessel for carriage of deck cargo, which of the following should be done?
erecting vertical pillars under the deck to support the cargo
It is possible and sometimes necessary to strengthen the deck of a vessel for carriage of deck cargo by:
Erecting vertical pillars under the deck to support the cargo
Structural stress can be reduced by:
even and symmetrical variable loading
Wale shores would be used when drydocking vessel with:
excessive deadrise
The depth of the ship from the upper deck to the underside of the keel is called?
Extreme depth
This weld should be used to attach stiffeners to a plate.
Fillet welds
What do you call the welds used to attach stiffeners to a plate?
fillet welds
A wooden plug fitted tightly in the vent of a damaged tank may prevent the tank from ______?
Filling completely
What is fitted in the airtight flat beneath the ventilators used to shut off air outlet from the engine room in case of fire?
fire flap
What is the term used for the outward curvature of the hull above the waterline?
flare
The outward curvature of the side shell above the waterline and promotes dryness and associated with the fore end of the ship is called :
Flare
What term indicates the outward curvature of the hull above the waterline?
flare
At the center line of the bottom structure is located the keel, which is reffered to as the backbone of the ship. The commonest form of keel and fitted in most ocean going vessels are called ______?
Flat plate keel
Baseline is the term that indicates the line drawn at the top of the:
flat plate keel
Aboard ship, vertical flat plates running transversely and connecting the vertical keel to the margin plates are called :
Floors
Which arrangement of shell plating is used MOST in modern shipbuilding?
flush
Panting frames are located in the :
fore and after peak tanks
This structure comprises the stem, bolbous bow, chain locker, hawse pipe and bow thruster.
Fore end structure
It is a watertight compartment between the foremost watertight bulkhead and the stem.
Fore peak
An imaginary line drawn perpendicular to the waterline at the point where the forward edge of the stem intersects the summer loadline is called:
Forward perpendicular
What provides the majority of strength to an aluminum-sided container?
Framework, primarily the corner post
