Civil Engineering MCQs

Page No. 8

Ratio of inertia force to surface Jension is known as ________________________?


aMach number

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bFroude number

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cReynold’s number

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d Weber’s number

✓


View Answer Weber’s number

Buoyant force is___________________?


a resultant force acting on a floating body

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bequal to the volume of liquid displaced

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cforce necessary to keep a body in equilibrium

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d the resultant force on a body due to the fluid surrounding it

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According to the principle of buoyancy a body totally or partially immersed in a fluid will be lifted up by a force equal to __________________?


a the weight of the body

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bmore than the weight of the body

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c less than the weight of the body

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d weight of the fluid displaced by the body

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For a body floating in a liquid the normal pressure exerted by the liquid acts at _________________?


abottom surface of the body

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be.g. of the body

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cmetacentre

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dall points on the surface of the body

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Metacentre is the point of intersection of _________________________?


avertical upward force through e.g. of body and center line of body

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bbuoyant force and the center line of body

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cmid point between e.g. and center of buoyancy

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dall of the above

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The depth of the center of pressure on a vertical rectangular gate 8 m wide and 6 m high, when the water surface coincides with the top of the gate, is ______________________?


a 2.4 m

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b3.0 m

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c4.0 m

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d”2.5 m

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View Answer 3.0 m

Choose the wrong statement___________________?


a The horizontal component of the hydro-static force on any surface is equal to the normal force on the vertical projection of the surface

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b The horizontal component acts through the center of pressure for the vertical projection

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cThe vertical component of the hydrostatic force on any surface is equal to the weight of the volume of the liquid above the area

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dhe vertical component passes through the center of pressure of the volume

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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 _____________________?


a2 meters of water column

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b3 meters of water column

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c 5 meters of water column

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d6 meters of water Column

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A square surface 3 m x 3 m lies in a vertical line in water pipe its upper edge at vater surface. The hydrostatic force on square surface is __________________?


a9,000 kg

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b13,500 kg

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c18,000 kg

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d27,000 kg

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View Answer 13,500 kg

The total pressure force on a plane area is equal to the area multiplied by the intensity of pressure at the centriod, if __________________?


a the area is horizontal

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b the area is vertical

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cthe area is inclined

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dall of the above

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View Answer all of the above

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