Civil Engineering MCQs

Page No. 7

The two important forces for a floating body are___________________?


abuoyancy, gravity

✓


bbuoyancy, pressure

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cbuoyancy, inertial

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d inertial, gravity

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View Answer buoyancy, gravity

Center of pressure on an inclined plane is______________________?


a at the centroid

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b above the centroid

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c below the centroid

✓


dat metacentre

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An open vessel of water is accelerated up an inclined plane. The free water surface will___________________?


abe horizontal

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bmake an angle in direction of inclination of inclined plane

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cmake an angle in opposite direction to inclination of inclined plane

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d any one of above is possible

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For a floating body to be in equilibrium __________________?


ameta center should be above e.g.

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

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ca righting couple should be formed

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dall of the above

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View Answer all of the above

Ratio of inertia force to elastic force is known as _____________________?


aMach number

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bFroude number

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cReynold’s number

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dWeber’s number

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View Answer Mach number

A ship whose hull length is 100 m is to travel at 10 m/sec. For dynamic similarity, at what velocity should a 1:25 model be towed through water ?


a10 m/sec

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b25 m/sec

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c 2 m/sec

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d50 m/sec

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View Answer 2 m/sec

A model of torpedo is tested in a towing tank at a velocity of 25 m/sec. The prototype is expected to attain a velocity of 5 m/sec. What model scale has been used ?


a1 : 5

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b 1 : 2.5

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c1 :25

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d 1:V5″

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View Answer 1 : 5

For a floating body to be in stable equilibrium, its metacentre should be_________________ ?


a below the center of gravity

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bbelow the center of buoyancy

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c above the center of buoyancy

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dabove the center of gravity

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A model of a reservior is drained in 4 mts by opening the sluice gate. The model scale is 1: 225. How long should it take to empty the prototype ?


a900 minutes

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b4 minutes

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c4 x (225)3/2 minutes

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d4 x V225 minutes

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View Answer 4 x V225 minutes

When a body floating in a liquid, is displaced slightly, it oscillates about ___________________?


ae.g. of body

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bcenter of pressure

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ccenter of buoyancy

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dmetacentre

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View Answer metacentre

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