civil engineering MCQs – Page 153

Practise multiple-choice questions from civil engineering for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

civil engineering Mcqs

3041. Metacentric height is the distance between the metacentre and___________________?
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A. water surface

B. center of buoyancy

C. center of gravity

D. center of pressure

E. none of the above

3042. The equation of continuity holds good when the flow __________________?
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A. is one dimensional

B. is steady

C. none of the above

D. all of the above

E. velocity is uniform at all the cross sec-tions

3043. In an isothermal atmosphere, the pressure__________________?
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A. decreases linearly with elevation

B. unpredictable

C. varies in the same way as the density

D. remains constant

E. increases exponentially with elevation

3044. If the atmospheric pressure on the surface of an oil tank (sp. gr. 0.8) is 0.2 kg/cm, the pressure at a depth of 50 m below the oil surface will be _____________________?
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A. 6 meters of water Column

B. 3 meters of water column

C. 5 meters of water column

D. 2 meters of water column

E. 7 meters of water column

3045. Select the correct statement ?
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A. Local atmospheric pressure depends upon elevation of locality only

B. Gauge piessure is equal to atmospheric pressure plus instrument reading

C. Standard atmospheric pressure is the mean local atmospheric pressure a* sea level

D. A barometer reads the difference be-tween local and standard atmospheric pressure

E. Local atmospheric pressure is always below standard atmospheric pressure

3046. Capillary action is due to the__________________?
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A. adhesion of the liquid molecules and the molecules on the surface of a solid

B. none of the above

C. surface tension

D. all of the above

E. cohesion of the liquid

3047. Rain drops are spherical because of____________________?
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A. viscosity

B. atmospheric pressure

C. surface tension forces

D. air resistance

E. none of the above

3048. Buoyant force is___________________?
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A. the resultant force on a body due to the fluid surrounding it

B. equal to the volume of liquid displaced

C. force necessary to keep a body in equilibrium

D. none of the above

E. resultant force acting on a floating body

3049. For a floating body to be in equilibrium __________________?
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A. none of the above

B. all of the above

C. meta center should be above e.g.

D. center of buoyancy and e.g. must lie on same vertical plane

E. a righting couple should be formed

3050. Liquids transmit pressure equally in all the directions. This is according to_________________?
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A. Boyles law

B. Newtons formula

C. Chezys equation

D. Archimedes principle

E. Pascals law

3051. A hydraulic press has a ram of 15 cm diameter and plunger of 1.5 cm. It is required to lift a weight of 1 tonne. The force required on plunger is equal tc__________________?
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A. 1 kg

B. 10 kg

C. 10,000 kg

D. 100 kg

E. 1000 kg

3052. The pressure in the air space above an oil (sp. gr. 0.8) surface in a tank is 0.1 kg/cm. The pressure at 2.5 m below the oil surface will be ___________________?
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A. 3.5 meters of water column

B. none of the above

C. 3 meters of water column

D. 4 m of water column

E. 2 meters of water column

3053. Two dimensional flow occurs when___________________?
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A. velocity, depth, pressure, etc. change from point to point in the fluid flow

B. the fluid particles move in plane or parallel planes and the streamline pat-terns are identical in each plane

C. the velocity of successive fluid par-ticles, at any point, is the same at suc-cessive periods of time

D. the direction and magnitude of the velocity at all points are identical

E. the magnitude and direction of the velocity do not change from point to point in the fluid

3054. In a forced vortex, the velocity of flow everywhere within the fluid is__________________?
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A. maximum

B. minimum

C. zero

D. unpredictable

E. non-zero finite

3055. The flow which neglects changes in a transverse direction is known as ____________________?
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A. uniform flow

B. one dimensional flow

C. turbulent flow

D. steady flow

E. streamline flow

3056. Bernoulli equation deals with the law of conservation of____________________?
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A. force

B. work

C. momentum

D. energy

E. mass

3057. The difference of pressure between the inside and outside of a liquid drop is________________?
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A. p = T/2r

B. = Txr

C. p = 2T/r

D. none of the above

E. = T/r

3058. The line of action of the buoyant force acts through the centroid of the ___________________?
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A. volume of the fluid vertically above the body

B. volume of the floating body

C. submerged body

D. displaced volume of the fluid

E. none of the above

3059. Differential monometer is used to measure _______________________?
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A. velocity in pipes

B. very low pressure

C. difference of pressure between two points

D. atmospheric pressure

E. pressure in pipes, channels etc.

3060. Two pipe systems can be said to be equivalent, when the following quantites are same______________?
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A. velocity and diameter

B. length and diameter

C. friction loss and flow

D. flow and length

E. friction factor and diameter

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