MCQOPTIONS
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MCQOPTIONS
This section includes 136 Mcqs, each offering curated multiple-choice questions to sharpen your Civil Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
In case of an airfoil, the separation of flow occurs________________? |
| A. | at the extreme rear of body |
| B. | at the extreme front of body |
| C. | midway between rear and front of body |
| D. | any where between rear and front of body depending upon Reynolds number |
| Answer» B. at the extreme front of body | |
| 52. |
In a two dimensional incompressible steady flow around an airfoil, the stream lines are 2 cm apart at a great distance from the airfoil, where the velocity is 30 m/sec. The velocity near the airfoil, where the stream lines are 1.5 cm apart, is_________________? |
| A. | 22.5 m/sec |
| B. | 33 m/sec |
| C. | 40 m/sec |
| D. | 90 m/sec |
| Answer» D. 90 m/sec | |
| 53. |
In a Sutro weir, the discharge is proportional to________________? |
| A. | H1/2 |
| B. | H3/2 |
| C. | H5/2 |
| D. | H |
| Answer» E. | |
| 54. |
In a forced vortex motion, the velocity of flow is________________? |
| A. | directly proportional to its radial distance from axis of rotation |
| B. | inversely proportional to its radial distance from the axis of rotation |
| C. | inversely proportional to the square of its radial distance from the axis of rotation |
| D. | directly proportional to the square of its radial distance from the axis of rotation |
| Answer» B. inversely proportional to its radial distance from the axis of rotation | |
| 55. |
If x is the distance from leading edge, then the boundary layer thickness in laminar flow varies as________________? |
| A. | x |
| B. | x/2 |
| C. | x/3 |
| D. | x/7 |
| Answer» B. x/2 | |
| 56. |
If velocity is zero over l/3rd of a cross-section and is uniform over remaining 2/3rd of the cross-section, then the correction factor for kinetic energy is__________________? |
| A. | 4/3 |
| B. | 3/2 |
| C. | 9/4 |
| D. | 27/8 |
| Answer» D. 27/8 | |
| 57. |
If the weight of a body immersed in a fluid exceeds the buoyant force, then the body will________________? |
| A. | rise until its weight equals the buoyant force |
| B. | tend to move downward and it may finally sink |
| C. | float |
| D. | none of the above |
| Answer» C. float | |
| 58. |
If the velocity is zero over half of the cross-sectional area and is uniform over the remaining half, then the momentum correction factor is_______________? |
| A. | 1 |
| B. | 4/3 |
| C. | 2 |
| D. | 4 |
| Answer» D. 4 | |
| 59. |
If the elevation of hydraulic grade line at the junction of three pipes is above the elevation of reservoirs B and C and below reservoir A, then the direction of flow will be___________________? |
| A. | from reservoir A to reservoirs B and C |
| B. | from reservoir B to reservoirs C and A |
| C. | from reservoir C to reservoirs A and B |
| D. | unpredictable |
| Answer» D. unpredictable | |
| 60. |
If the dynamic viscosity of a fluid is 0.5 poise and specific gravity is 0.5, then the kinematic viscosity of that fluid in stokes is__________________? |
| A. | 0.25 |
| B. | 0.50 |
| C. | 1.0 |
| D. | none of the above |
| Answer» D. none of the above | |
| 61. |
If a vessel containing liquid moves downward with a constant acceleration equal to ‘g’ then_____________? |
| A. | the pressure throughout the liquid mass is atmospheric |
| B. | there will be vacuum in the liquid |
| C. | the pressure in the liquid mass is greater than hydrostatic pressure |
| D. | none of the above |
| Answer» B. there will be vacuum in the liquid | |
| 62. |
If a sphere of diameter 1 cm falls in castor oil of kinematic viscosity 10 stokes, with a terminal velocity of 1.5 cm/sec, the coefficient of drag on the sphere is________________? |
| A. | less than 1 |
| B. | between 1 and 100 |
| C. | 160 |
| D. | 200 |
| Answer» D. 200 | |
| 63. |
For laminar flow in a pipe of circular cross-section, the Darcy’s friction factor f is________________? |
| A. | directly proportional to Reynolds number and independent of pipe wall roughness |
| B. | directly proportional to pipe wall roughness and independent of Reynolds number |
| C. | inversely proportional to Reynolds number and indpendent of pipe wall roughness |
| D. | inversely proportional to Reynolds number and directly proportional to pipe wall roughness |
| Answer» D. inversely proportional to Reynolds number and directly proportional to pipe wall roughness | |
| 64. |
For laminar flow in circular pipes, the Darcy’s friction factor f is equal to_________________? |
| A. | 16/Re |
| B. | 32/ Re |
| C. | 64/ Re |
| D. | none of the above where R,, is Reynolds number |
| Answer» D. none of the above where R,, is Reynolds number | |
| 65. |
For hydro-dynamically smooth boundary, the friction coefficient for turbulent flow is_______________? |
| A. | constant |
| B. | dependent only on Reynolds number |
| C. | a function of Reynolds number and relative roughness |
| D. | dependent on relative roughness only |
| Answer» C. a function of Reynolds number and relative roughness | |
| 66. |
For a sphere of radius 15 cm moving with a uniform velocity of 2 m/sec through a liquid of specific gravity 0.9 and dynamic viscosity 0.8 poise, the Reynolds number will be_________________? |
| A. | 300 |
| B. | 337.5 |
| C. | 600 |
| D. | 675 |
| Answer» E. | |
| 67. |
Flow at constant rate through a tapering pipe is________________?_x005F_x000D_1. steady flow_x005F_x000D_2. uniform flow_x005F_x000D_3. unsteady flow_x005F_x000D_4. non-uniform flow_x005F_x000D_The correct answer is? |
| A. | (1) and (2) |
| B. | (1)and(iv) |
| C. | (2) and (3) |
| D. | (2) and (4) |
| Answer» C. (2) and (3) | |
| 68. |
Equation of continuity is based on the principle of conservation of_________________? |
| A. | mass |
| B. | energy |
| C. | momentum |
| D. | none of the above |
| Answer» B. energy | |
| 69. |
Due to each end contraction, the discharge of rectangular sharp crested weir is reduced by________________? |
| A. | 5% |
| B. | 10% |
| C. | 15% |
| D. | 20% |
| Answer» B. 10% | |
| 70. |
Drag force is a function of________________?_x005F_x000D_1. projected area of the body_x005F_x000D_2. mass density of the fluid_x005F_x000D_3. velocity of the body_x005F_x000D_The correct answer is ? |
| A. | (1) and (2) |
| B. | (1) and (3) |
| C. | (2) and (3) |
| D. | (1), (2) and (3) |
| Answer» E. | |
| 71. |
Coefficient of velocity of venturimeter_________________? |
| A. | is independent of Reynolds number |
| B. | decreases with higher Reynolds number |
| C. | is equal to the coefficient of discharge of venturimeter |
| D. | none of the above |
| Answer» D. none of the above | |
| 72. |
Coefficient of velocity for Borda’s mouth piece running full is________________? |
| A. | 0.611 |
| B. | 0.707 |
| C. | 0.855 |
| D. | 1.00 |
| Answer» C. 0.855 | |
| 73. |
Coefficient of contraction for an external cylindrical mouthpiece is_________________? |
| A. | 1.00 |
| B. | 0.855 |
| C. | 0.7H |
| D. | 0.611 |
| Answer» B. 0.855 | |
| 74. |
Coefficient of discharge for a totally submerged orifice as compared to that for an orifice discharging free is__________________? |
| A. | slightly less |
| B. | slightly more |
| C. | nearly half |
| D. | equal |
| Answer» B. slightly more | |
| 75. |
Centre of buoyancy always_________________? |
| A. | coincides with the centre of gravity |
| B. | coincides with the centroid of the volume of fluid displaced |
| C. | remains above the centre of gravity |
| D. | remains below the centre of gravity |
| Answer» C. remains above the centre of gravity | |
| 76. |
Ay between two stream lines represents________________? |
| A. | velocity |
| B. | discharge |
| C. | head |
| D. | pressure |
| Answer» C. head | |
| 77. |
An open tank contains 1 m deep water with 50 cm depth of oil of specific gravity 0.8 above it. The intensity of pressure at the bottom of tank will be________________? |
| A. | 4 kN/m2 |
| B. | 10 kN/m2 |
| C. | 12 kN/m2 |
| D. | 14 kN/m2 |
| Answer» E. | |
| 78. |
An open cubical tank of 2 m side is filled with water. If the tank is rotated with an acceleration such that half of the water spills out, then the acceleration is equal to_______________? |
| A. | g/3 |
| B. | g/2 |
| C. | 2g/3 |
| D. | g |
| Answer» E. | |
| 79. |
An ideal fluid is_______________? |
| A. | one which obeys Newton’s law of viscosity |
| B. | frictionless and incompressible |
| C. | very viscous |
| D. | frictionless and compressible |
| Answer» C. very viscous | |
| 80. |
A vertical rectangular plane surface is submerged in water such that its top and bottom surfaces are 1.5 m and 6.0 m res-pectively below the free surface. The position of center of pressure below the free surface will be at a distance of________________? |
| A. | 3.75 m |
| B. | 4.0 m |
| C. | 4.2m |
| D. | 4.5m |
| Answer» D. 4.5m | |
| 81. |
A valve is suddenly closed in a water main in wl.ich the velocity is 1 m/sec and velocity of pressure wave is 981 m/ sec. The inertia head at the valve will be________________? |
| A. | 1 m |
| B. | 10m |
| C. | 100m |
| D. | none of the above |
| Answer» D. none of the above | |
| 82. |
A right circular cylinder open at the top is filled with liquid and rotated about its vertical axis at such a speed that half the liquid spills out, then the pressure intensity at the center of bottom is___________________? |
| A. | zero |
| B. | one-fourth its value when cylinder was full |
| C. | one-half its value when cylinder was full |
| D. | cannot be predicted from the given data |
| Answer» B. one-fourth its value when cylinder was full | |
| 83. |
A rectangular block 2 m long, 1 m wide and 1 m deep floats in water, the depth of immersion being 0.5 m. If water weighs 10 kN/m3, then the weight of the block is________________? |
| A. | 5kN |
| B. | 10kN |
| C. | 15 kN |
| D. | 20 kN |
| Answer» C. 15 kN | |
| 84. |
A fluid of kinematic viscosity 0.4 cm2/sec flows through a 8 cm diameter pipe. The maximum velocity for laminar flow will be__________________? |
| A. | less than 1 m/sec |
| B. | 1 m/sec |
| C. | 1.5 m/sec |
| D. | 2 m/sec |
| Answer» C. 1.5 m/sec | |
| 85. |
A floating body is said to be in a state of stable equilibrium_________________? |
| A. | when its metacentric height is zero |
| B. | when the metacentre is above the centre of gravity |
| C. | when the metacentre is below the centre of gravity |
| D. | only when its centre of gravity is below its centre of buoyancy |
| Answer» C. when the metacentre is below the centre of gravity | |
| 86. |
A closed tank containing water is moving in a horizontal direction along a straight line at a constant speed. The tank also contains a steel ball and a bubble of air. If the tank is decelerated horizontally, then________________?_x005F_x000D_1. the ball will move to the front_x005F_x000D_2. the bubble will move to the front_x005F_x000D_3. the ball will move to the rear_x005F_x000D_4. the bubble will move to the rear_x005F_x000D_Find out which of the above statements are correct ? |
| A. | (1) and (2) |
| B. | (1)and(4) |
| C. | (2) and (3) |
| D. | (3) and (4) |
| Answer» C. (2) and (3) | |
| 87. |
A closed tank containing water is moving in a horizontal direction along a straight line at a constant speed. The tank also contains a steel ball and a bubble of air. If the tank is decelerated horizontally, then________________?1. the ball will move to the front2. the bubble will move to the front3. the ball will move to the rear4. the bubble will move to the rearFind out which of the above statements are correct ? |
| A. | (1) and (2) |
| B. | (1)and(4) |
| C. | (2) and (3) |
| D. | (3) and (4) |
| Answer» C. (2) and (3) | |
| 88. |
If Velocity, pressure, density etc., do not change at a point with respect to time, flow is called |
| A. | uniform |
| B. | incompressible |
| C. | non-uniform |
| D. | steady |
| Answer» E. | |
| 89. |
If the velocity in a fluid flow change with respect to length of direction of flow, it is called |
| A. | unsteady flow |
| B. | compressible flow |
| C. | irrotational flow |
| D. | none of the above |
| Answer» E. | |
| 90. |
If velocity, pressure, density etc., change at a point with respect to time, flow is called |
| A. | uniform |
| B. | compressible |
| C. | unsteady |
| D. | incompressible |
| Answer» D. incompressible | |
| 91. |
If the velocity in a fluid flow does not change with respect to length of direction of flow, it is called |
| A. | steady flow |
| B. | uniform flow |
| C. | incompressible |
| D. | rotational |
| Answer» C. incompressible | |
| 92. |
If the density of the fluid is constant from point to point in a flow region, it is called |
| A. | steady flow. |
| B. | incompressible flow |
| C. | uniform flow |
| D. | rotational flow. |
| Answer» C. uniform flow | |
| 93. |
Chezy’s Formula is given as |
| A. | v= s√(rc) |
| B. | v= c √(rs) |
| C. | v= r √(cs) |
| D. | none of the above. |
| Answer» C. v= r √(cs) | |
| 94. |
If the density of the flow changes from point to point in a flow region, it is called |
| A. | steady flow. |
| B. | unsteady flow |
| C. | non uniform |
| D. | compressible |
| Answer» E. | |
| 95. |
The discharge through the trapezoidal channel is maximum when |
| A. | half of the top width= sloping side |
| B. | top width= half of the sloping side |
| C. | top width= 1.5 x sloping side |
| D. | none of the above |
| Answer» B. top width= half of the sloping side | |
| 96. |
The maximum velocity through a circular channel when depth flow is equal to |
| A. | 0.95 x diameter |
| B. | 0.5 x diameter |
| C. | 0.81 x diameter |
| D. | none of the above |
| Answer» D. none of the above | |
| 97. |
The maximum discharge through a circular channel takes place when depth of flow is equal to |
| A. | 0.95 x diameter |
| B. | 0.3 x diameter |
| C. | 0.81 x diameter |
| D. | 0.5 x diameter |
| Answer» B. 0.3 x diameter | |
| 98. |
The most economical section is one for which a given cross sectional area, the slope of the bed (s) and coefficient of resistance has |
| A. | maximum wetted perimeter |
| B. | maximum discharge |
| C. | maximum depth of flow |
| D. | none of the above |
| Answer» C. maximum depth of flow | |
| 99. |
A hydraulically efficient trapezoidal section has a side slopes of 2 horizontal :1 vertical. The ratio of the bed width to depth B/y in this channel is |
| A. | 4.94 |
| B. | 2.19 |
| C. | 0.472 |
| D. | 0.236 |
| Answer» D. 0.236 | |
| 100. |
al to 2m and 1m respectively. If the flow is uniform and the value of Chezy’s constant is 60, the discharge through the channel is |
| A. | 1.0 m3/s |
| B. | 1.5m3/s |
| C. | 2.0m3/s |
| D. | 3.0m3/s |
| Answer» C. 2.0m3/s | |