Looks Fam Website Flashcards
1
Q
- Liquids:
A
B do not occupy definite shape.
1
Q
- Specific weight of liquid:
A
Does not vary on any other planet
1
Q
- Specific weight of liquid:
A
Does not vary on any other planet
2
Q
- The specific weight of water is 1000 kg/m³
A
D all the above.
2
Q
- The specific weight of water is 1000 kg/m³
A
D all the above.
3
Q
- Specific weight of sea water is more than that of pure water because of:
A
all of the above
3
Q
- Specific weight of sea water is more than that of pure water because of:
A
all of the above
4
Q
- Water belongs to:
A
A Newtonian fluids.
4
Q
- Water belongs to:
A
A Newtonian fluids.
5
Q
- Fluids change the volume under external pressure due to:
A
C compressibility.
5
Q
- Fluids change the volume under external pressure due to:
A
C compressibility.
6
Q
- Molecules of fluids get attracted due to:
A
D adhesion.
6
Q
- Molecules of fluids get attracted due to:
A
D adhesion.
7
Q
- Falling drops of water become spheres due to:
A
C surface tension.
7
Q
- Falling drops of water become spheres due to:
A
C surface tension.
8
Q
- In an open tube
A
free surface of mercury remains:
8
Q
- In an open tube
A
free surface of mercury remains:
9
Q
- If cohesion between the molecules of a fluid is more than adhesion between the fluid and glass
A
the free level of fluid in a dipped glass tube will be:
9
Q
- If cohesion between the molecules of a fluid is more than adhesion between the fluid and glass
A
the free level of fluid in a dipped glass tube will be:
10
Q
- A rise or fall of liquid in a glass tube of a very small diameter when dipped is:
A
Directly proportional to the diameter of the glass tube.
10
Q
- A rise or fall of liquid in a glass tube of a very small diameter when dipped is:
A
Directly proportional to the diameter of the glass tube.
11
Q
- Hydrostatic pressure on a dam depends upon its:
A
D both (b) and (c).
11
Q
- Hydrostatic pressure on a dam depends upon its:
A
D both (b) and (c).
12
Q
- Barometers are used to measure:
A
C atmospheric pressure.
12
13. Barometers are used to measure:
C atmospheric pressure.
13
14. Piezometers are used to measure:
very low pressure
13
14. Piezometers are used to measure:
very low pressure
14
15. Manometers are used to measure:
Pressure in water channels
14
15. Manometers are used to measure:
Pressure in water channels
15
16. Differential manometers are used to measure:
B difference in pressure at two points.
15
16. Differential manometers are used to measure:
B difference in pressure at two points.
16
17. The pressure less than atmospheric pressure
is known:
16
17. The pressure less than atmospheric pressure
is known:
17
18. Atmospheric pressure varies with:
none of these
17
18. Atmospheric pressure varies with:
none of these
18
19. Mercury is generally used in barometers because:
D both (a) and (b) above.
18
19. Mercury is generally used in barometers because:
D both (a) and (b) above.
19
20. The total pressure force on a plane area is equal to the area multiplied by the intensity of pressure at its centroid
if:
19
20. The total pressure force on a plane area is equal to the area multiplied by the intensity of pressure at its centroid
if:
20
21. The center of pressure of a vertical plane immersed in a liquid is at:
none of these
20
21. The center of pressure of a vertical plane immersed in a liquid is at:
none of these
21
22. On an inclined plane
center of pressure is located:
21
22. On an inclined plane
center of pressure is located:
22
23. When a body is totally or partially immersed in a fluid
it is buoyed up by a force equal to:
22
23. When a body is totally or partially immersed in a fluid
it is buoyed up by a force equal to:
23
24. A floating body attains stable equilibrium if its metacenter is:
B above the centroid.
23
24. A floating body attains stable equilibrium if its metacenter is:
B above the centroid.
24
25. Center of buoyancy is:
B centroid of the fluid displaced.
24
25. Center of buoyancy is:
B centroid of the fluid displaced.
25
1. The rise of the liquid along the walls of a revolving cylinder above the initial level
is:
25
1. The rise of the liquid along the walls of a revolving cylinder above the initial level
is:
26
2. When a liquid rotates at constant angular velocity about a vertical axis of a rigid body
the pressure:
26
2. When a liquid rotates at constant angular velocity about a vertical axis of a rigid body
the pressure:
27
3. The imaginary line drawn such that the tangents at its all points indicate the direction of the velocity of the fluid particles at each point
is called:
27
3. The imaginary line drawn such that the tangents at its all points indicate the direction of the velocity of the fluid particles at each point
is called:
28
4. In fluids
steady flow occurs when:
28
4. In fluids
steady flow occurs when:
29
5. Uniform flow is said to occur when:
A size and shape of the crosssection in a particular length remain constant.
29
5. Uniform flow is said to occur when:
A size and shape of the crosssection in a particular length remain constant.
30
6. If velocities of fluid particles vary from point to point in magnitude and direction
as well as from instant to instant
30
6. If velocities of fluid particles vary from point to point in magnitude and direction
as well as from instant to instant
31
7. A steady uniform flow is through:
D a long pipe at constant rate.
31
7. A steady uniform flow is through:
D a long pipe at constant rate.
32
8. A nonuniform steady flow is through:
A an expanding tube at constant rate.
32
8. A nonuniform steady flow is through:
A an expanding tube at constant rate.
33
9. The continuity equation:
B relates mass rate of flow along a streamline.
33
9. The continuity equation:
B relates mass rate of flow along a streamline.
34
10. Equation of continuity of fluids is applicable only if:
D all the above.
34
10. Equation of continuity of fluids is applicable only if:
D all the above.
35
11. The flow in which each liquid particle has a definite path
and the paths of adjacent particles do not cross each other
35
11. The flow in which each liquid particle has a definite path
and the paths of adjacent particles do not cross each other
36
12. Total head of a liquid particle in motion is the sum of:
D potential head
36
12. Total head of a liquid particle in motion is the sum of:
D potential head
37
13. The main assumption of Bernoulli's equation is:
D All the above.
37
13. The main assumption of Bernoulli's equation is:
D All the above.
38
14. Reynold number is the ratio of initial force and:
D viscosity.
38
14. Reynold number is the ratio of initial force and:
D viscosity.
39
15. The velocity of the fluid particle at the center of the pipe section
is:
39
15. The velocity of the fluid particle at the center of the pipe section
is:
40
16. An independent mass of a fluid does not possess:
Pressure Energy
40
16. An independent mass of a fluid does not possess:
Pressure Energy
41
17. Frictional loss of head includes the loss of energy due to:
none of these
41
17. Frictional loss of head includes the loss of energy due to:
none of these
42
18. Energy equation is usually applicable to:
A steady flow.
42
18. Energy equation is usually applicable to:
A steady flow.
43
19. The line joining the points to which the liquid rises in vertical piezometer tubes fitted at different crosssections of a conduit
is known as:
43
19. The line joining the points to which the liquid rises in vertical piezometer tubes fitted at different crosssections of a conduit
is known as:
44
20. Hydraulic grade line:
A may be above or below the center line of conduit.
44
20. Hydraulic grade line:
A may be above or below the center line of conduit.
45
21. A pitot tube is used to measure:
A velocity of flow.
45
21. A pitot tube is used to measure:
A velocity of flow.
46
22. The ratio of the inertia and viscous forces acting in any flow
ignoring other forces
46
22. The ratio of the inertia and viscous forces acting in any flow
ignoring other forces
47
23. The ratio of the inertia and gravitational force acting in any flow
ignoring other forces
47
23. The ratio of the inertia and gravitational force acting in any flow
ignoring other forces
48
24. Mach number is the ratio of inertia force to:
Elasticity
48
24. Mach number is the ratio of inertia force to:
Elasticity
49
25. Weber number is the ratio of inertia force to:
C surface tension.
49
25. Weber number is the ratio of inertia force to:
C surface tension.
50
1. A piezometer opening in pipes measures:
B static pressure.
50
1. A piezometer opening in pipes measures:
B static pressure.
51
2. Manning's formula is used for:
C head loss due to friction in open channels.
51
2. Manning's formula is used for:
C head loss due to friction in open channels.
52
3. For a long pipe
the head loss:
52
3. For a long pipe
the head loss:
53
4. Hydraulic radius is equal to:
C area divided by wetted perimeter.
53
4. Hydraulic radius is equal to:
C area divided by wetted perimeter.
54
5. The magnitude of water hammer in a pipe depends upon:
D all the above.
54
5. The magnitude of water hammer in a pipe depends upon:
D all the above.
55
6. For the most economical rectangular section of a channel
the depth is kept:
55
6. For the most economical rectangular section of a channel
the depth is kept:
56
7. For the most economical trapezoidal section of a channel with regards to discharge
the required condition is:
56
7. For the most economical trapezoidal section of a channel with regards to discharge
the required condition is:
57
8. Most economical section of a triangular channel is:
right angled triangle with equal sides
57
8. Most economical section of a triangular channel is:
right angled triangle with equal sides
58
9. Most economical section of a circular channel for maximum discharge:
all of the above
58
9. Most economical section of a circular channel for maximum discharge:
all of the above
59
10. The most efficient channel section is:
semi-circular
59
10. The most efficient channel section is:
semi-circular
60
11. The phenomenon occurring in an open channel when a rapidly flowing stream abruptly changes to a slowly flowing stream causing a distinct rise of liquid surface is:
B hydraulic jump.
60
11. The phenomenon occurring in an open channel when a rapidly flowing stream abruptly changes to a slowly flowing stream causing a distinct rise of liquid surface is:
B hydraulic jump.
61
12. An open container filled with water is moved vertically downward with a uniform linear acceleration. The pressure at its bottom will be:
lesser than static pressure.
61
12. An open container filled with water is moved vertically downward with a uniform linear acceleration. The pressure at its bottom will be:
lesser than static pressure.
62
13. The metacentric height of a body equals the distance between:
A the metacenter and center of gravity.
62
13. The metacentric height of a body equals the distance between:
A the metacenter and center of gravity.
63
14. In steady flow
which one of the following changes with time:
63
14. In steady flow
which one of the following changes with time:
64
15. For a most economical rectangular channel
the width of the channel must be:
64
15. For a most economical rectangular channel
the width of the channel must be:
65
16. For a most economical rectangular channel
the hydraulic mean depth is equal to:
65
16. For a most economical rectangular channel
the hydraulic mean depth is equal to:
66
17. For a most economical trapezoidal open channel
the half of the top width must be equal to:
66
17. For a most economical trapezoidal open channel
the half of the top width must be equal to:
67
18. For the most economical trapezoidal open channel:
D all of these.
67
18. For the most economical trapezoidal open channel:
D all of these.
68
19. The best side slope for the most economical trapezoidal section is:
60°
68
19. The best side slope for the most economical trapezoidal section is:
60°
69
20. For critical depth of flow of water in open channels
the specific energy must be:
69
20. For critical depth of flow of water in open channels
the specific energy must be:
70
1. Find the swell of a soil that weighs 1661 kg/m³ in its natural state and 1186 kg/m³ after excavation.
0.4
70
1. Find the swell of a soil that weighs 1661 kg/m³ in its natural state and 1186 kg/m³ after excavation.
0.4
71
2. Find the shrinkage of a soil that weighs 1661 kg/m³ in its natural state and 2077 kg/m³ after compaction.
B 20%
71
2. Find the shrinkage of a soil that weighs 1661 kg/m³ in its natural state and 2077 kg/m³ after compaction.
B 20%
72
3. A soil weighs 1163 kg/LCM
1661 kg/BCM
72
3. A soil weighs 1163 kg/LCM
1661 kg/BCM
73
4. A soil weighs 1163 kg/LCM
1661 kg/BCM
73
4. A soil weighs 1163 kg/LCM
1661 kg/BCM
74
5. Find the base width and height of a triangular spoil bank containing 76.5 BCM if the pile length is 9.14 m
the soil's angle of repose is 37°
74
5. Find the base width and height of a triangular spoil bank containing 76.5 BCM if the pile length is 9.14 m
the soil's angle of repose is 37°
75
6. Find the base diameter and height of a conical spoil pile that will contain 76.5 BCM of excavation if the soil's angle of repose is 32° and its swell is 12%.
B D = 10.16m H = 3.17m
75
6. Find the base diameter and height of a conical spoil pile that will contain 76.5 BCM of excavation if the soil's angle of repose is 32° and its swell is 12%.
B D = 10.16m H = 3.17m
76
7. Find the volume (bank measure) of excavation required for a trench 0.92 m wide
1.83 m deep
76
7. Find the volume (bank measure) of excavation required for a trench 0.92 m wide
1.83 m deep
77
8. Estimate the actual bucket load in bank cubic meters for a loader bucket whose heaped capacity is 3.82 m³. The soil's bucket fill factor is 0.90 and its load factor is 0.80.
B 2.75 BCM
77
8. Estimate the actual bucket load in bank cubic meters for a loader bucket whose heaped capacity is 3.82 m³. The soil's bucket fill factor is 0.90 and its load factor is 0.80.
B 2.75 BCM
78
9. Find the expected production in loose cubic meters (LCM) per hour of a small hydraulic excavator.
C 113 LCM/h
78
9. Find the expected production in loose cubic meters (LCM) per hour of a small hydraulic excavator.
C 113 LCM/h
79
10. Find the expected production in loose cubic meters (LCM) per hour of a 2.3m³ hydraulic shovel.
290 LCM/h
79
10. Find the expected production in loose cubic meters (LCM) per hour of a 2.3m³ hydraulic shovel.
290 LCM/h
80
11. Determine the expected dragline production in loose cubic meters (LCM) per hour based on the provided information.
A 165 LCM/h
80
11. Determine the expected dragline production in loose cubic meters (LCM) per hour based on the provided information.
A 165 LCM/h
81
12. Estimate the production in loose cubic meters per hour for a mediumweight clamshell excavating loose earth.
A 53 LCM/h
81
12. Estimate the production in loose cubic meters per hour for a mediumweight clamshell excavating loose earth.
A 53 LCM/h
82
13. A wheel tractorscraper weighing 91 t is being operated on a haul road with a tire penetration of 5 cm. What is the total resistance (kg) and effective grade when ascending a slope of 5%?
A Total Resistance = 9100 kg; Effective Grade = 10%
82
13. A wheel tractorscraper weighing 91 t is being operated on a haul road with a tire penetration of 5 cm. What is the total resistance (kg) and effective grade when ascending a slope of 5%?
A Total Resistance = 9100 kg; Effective Grade = 10%
83
14. A wheel tractorscraper weighing 91 t is being operated on a haul road with a tire penetration of 5 cm. What is the total resistance (kg) and effective grade when descending a slope of 5%?
C Total Resistance = 0 kg; Effective Grade = 0%
83
14. A wheel tractorscraper weighing 91 t is being operated on a haul road with a tire penetration of 5 cm. What is the total resistance (kg) and effective grade when descending a slope of 5%?
C Total Resistance = 0 kg; Effective Grade = 0%
84
15. A crawler tractor weighing 36 t is towing a rubbertired scraper weighing 45.5 t up a grade of 4%. What is the total resistance (kg)?
A 5535 kg
84
15. A crawler tractor weighing 36 t is towing a rubbertired scraper weighing 45.5 t up a grade of 4%. What is the total resistance (kg)?
A 5535 kg
85
16. A fourwheeldrive tractor weighs 20
000 kg and produces a maximum rimpull of 18
85
16. A fourwheeldrive tractor weighs 20
000 kg and produces a maximum rimpull of 18
86
17. A powershift crawler tractor has a rated blade capacity of 7.65 LCM. Estimate the production of the dozer.
C 271 LCM/h
86
17. A powershift crawler tractor has a rated blade capacity of 7.65 LCM. Estimate the production of the dozer.
C 271 LCM/h
87
18. Estimate the hourly production in loose volume (LCM) of a 2.68m³ wheel loader.
B 168 LCM/h
87
18. Estimate the hourly production in loose volume (LCM) of a 2.68m³ wheel loader.
B 168 LCM/h
88
19. Estimate the production of a singleengine twoaxle tractor scraper.
B 192 BCM/h
88
19. Estimate the production of a singleengine twoaxle tractor scraper.
B 192 BCM/h
89
20. The estimated cycle time for a wheel scraper is 6.5 min. Calculate the number of pushers required to serve a fleet of nine scrapers.
A backtrack = 3; chain = 2
89
20. The estimated cycle time for a wheel scraper is 6.5 min. Calculate the number of pushers required to serve a fleet of nine scrapers.
A backtrack = 3; chain = 2
90
21. Find the expected production of the scraper fleet if only one pusher is available and the chainloading method is used.
1112 BCM/h
90
21. Find the expected production of the scraper fleet if only one pusher is available and the chainloading method is used.
1112 BCM/h
91
22. Given the shovel/truck operation
calculate the number of trucks required and the production of this combination.
91
22. Given the shovel/truck operation
calculate the number of trucks required and the production of this combination.
92
23. Given the shovel/truck operation
calculate the expected production if two trucks are removed.
92
23. Given the shovel/truck operation
calculate the expected production if two trucks are removed.
93
24. Calculate the grader hours required for reshaping and leveling the gravel road.
C 23.1 h
93
24. Calculate the grader hours required for reshaping and leveling the gravel road.
C 23.1 h
94
25. Determine the rock volume produced per meter of drilling.
B 6.8 m³/m
94
25. Determine the rock volume produced per meter of drilling.
B 6.8 m³/m
95
26. Find the minimum size of the 38mm screen to be used.
2.9m²
95
26. Find the minimum size of the 38mm screen to be used.
2.9m²
96
27. Calculate the maximum hourly production of an asphalt plant.
B 123 ton/h
96
27. Calculate the maximum hourly production of an asphalt plant.
B 123 ton/h
97
28. Calculate the volume of plastic concrete produced by the mix design.
B 0.51 m³
97
28. Calculate the volume of plastic concrete produced by the mix design.
B 0.51 m³
98
29. Determine the actual weight of each component to be added considering excessnmoisture.
A Water = 63 kg; Sand = 447 kg; Gravel = 560 kg
98
29. Determine the actual weight of each component to be added considering excessnmoisture.
A Water = 63 kg; Sand = 447 kg; Gravel = 560 kg
99
30. Refer to the previous problem. Determine the weight of each component required to make a threebag mix.
B Cement = 127.8 kg; Sand = 370 kg; Gravel = 464k; Water= 52 kg; Mix Volume= 0.42 cu.m
99
30. Refer to the previous problem. Determine the weight of each component required to make a threebag mix.
B Cement = 127.8 kg; Sand = 370 kg; Gravel = 464k; Water= 52 kg; Mix Volume= 0.42 cu.m
100
1. Find the required feed rate (ton/h) for each mix component to achieve this production.
C 115.6
100
1. Find the required feed rate (ton/h) for each mix component to achieve this production.
C 115.6
101
2. Using the equation and the driving data below
determine the safe load capacity of a 6in.square concrete pile 60 ft long. Assume that the unit weight of the pile is 150 lb/cu ft. Pile driver energy = 14
101
2. Using the equation and the driving data below
determine the safe load capacity of a 6in.square concrete pile 60 ft long. Assume that the unit weight of the pile is 150 lb/cu ft. Pile driver energy = 14
102
3. Calculate the safe load capacity of a bulb pile based on the following driving data. Hammer weight = 3 tons Height of drop = 20 ft Volume in last batch driven = 5 cu ft Number of blows to drive last batch = 40 Volume of base and plug = 25 cu ft Selected K value = 25
B 164 t
102
3. Calculate the safe load capacity of a bulb pile based on the following driving data. Hammer weight = 3 tons Height of drop = 20 ft Volume in last batch driven = 5 cu ft Number of blows to drive last batch = 40 Volume of base and plug = 25 cu ft Selected K value = 25
B 164 t
103
4. Determine the design lateral force for the slab form 152 mm thick
6.1 m wide
103
4. Determine the design lateral force for the slab form 152 mm thick
6.1 m wide
104
5. Calculate the number of bricks 95 x 57 x 203 mm laid in running bond required for a double wythe wall 2.44 x 4.27 m having one opening 1.22 x 1.83 m and one opening 0.81 x 1.22 m. Mortar joints are 13 mm. Allow 3% for brick waste.
B 981
104
5. Calculate the number of bricks 95 x 57 x 203 mm laid in running bond required for a double wythe wall 2.44 x 4.27 m having one opening 1.22 x 1.83 m and one opening 0.81 x 1.22 m. Mortar joints are 13 mm. Allow 3% for brick waste.
B 981
105
6. Estimate the quantity of mortar required for the previous problem. The joint thickness between wythes is 13 mm. Assume a 25% waste factor.
C 0.53 m³
105
6. Estimate the quantity of mortar required for the previous problem. The joint thickness between wythes is 13 mm. Assume a 25% waste factor.
C 0.53 m³
106
7. Find the maximum safe unsupported height in feet and meters for a 20cm heavyweight concrete block wall if the maximum expected wind velocity is 80 km/h.
A 1.9m
106
7. Find the maximum safe unsupported height in feet and meters for a 20cm heavyweight concrete block wall if the maximum expected wind velocity is 80 km/h.
A 1.9m
107
8. Using the straightline method of depreciation
find the annual depreciation and book value at the end of each year for a track loader having an initial cost of $50
107
8. Using the straightline method of depreciation
find the annual depreciation and book value at the end of each year for a track loader having an initial cost of $50
108
9. Estimate the hourly repair cost for the first year of operation of a crawler tractor costing $136
000 and having a 5year life. Assume average operating conditions and 2000 h of operation during the year.
108
9. Estimate the hourly repair cost for the first year of operation of a crawler tractor costing $136
000 and having a 5year life. Assume average operating conditions and 2000 h of operation during the year.
109
10. Calculate the expected hourly owning and operating cost for the second year of operation of the twinengine scraper described below. Cost delivered = $152
000 Tire cost = $12
109
10. Calculate the expected hourly owning and operating cost for the second year of operation of the twinengine scraper described below. Cost delivered = $152
000 Tire cost = $12
110
11. To compress 2.8 m³ of free air per minute from atmospheric (0.101 N/mm²) to (0.7 N/mm² indicated on the gauge (i.e. 8.01 bar absolute) requires a compressor with a theoretical power value Theoretical power = 103 × 0.101 x log P2 9e 0.101
C 9.7 kW or 13.1 hp
110
11. To compress 2.8 m³ of free air per minute from atmospheric (0.101 N/mm²) to (0.7 N/mm² indicated on the gauge (i.e. 8.01 bar absolute) requires a compressor with a theoretical power value Theoretical power = 103 × 0.101 x log P2 9e 0.101
C 9.7 kW or 13.1 hp
111
12. The density of air decreases with increasing altitude and thus for a compressor operated above sea level
k should be reduced. For example
111
12. The density of air decreases with increasing altitude and thus for a compressor operated above sea level
k should be reduced. For example
112
13. Calculate the pressure loss for a 200 m length of 50 mm diameter pipe
resulting from delivering 10 m³/min (free air) compressed to 7 bar
112
13. Calculate the pressure loss for a 200 m length of 50 mm diameter pipe
resulting from delivering 10 m³/min (free air) compressed to 7 bar
113
14. A drill hole of diameter d (mm)
with the bottom charge extending 1.3B from the base
113
14. A drill hole of diameter d (mm)
with the bottom charge extending 1.3B from the base
