hydraulics and fluid mechanics Mcqs
201. Centre of pressure compared to e.g. is______________?
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A. above it

B. above or below depending on area of body

C. at same point

D. none of the above

E. below it
202. The velocity of jet of water travelling out of opening in a tank filled with water is proportional to___________________?
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A. head of water (h)

B. h3/1.

C. V/T

D. h2

E. h2

203. The atmospheric pressure with rise in altitude decreases____________________?
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A. first steeply and then gradually

B. first slowly and then steeply

C. linearly

D. none of the above

E. unpredictable

204. 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 ?
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A. 1:V5?

B. 1:25

C. 01:02.5

D. 1 : 5

E. 1 : 53/2

205. Normal depth in open channel flow is the depth of flow corresponding to_______________?
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A. critical flow

B. uniform flow

C. unsteady flow

D. laminar flow

E. steady flow

206. A body floats in stable equilibrium________________?
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A. when its e.g. is below its center of buoyancy

B. when the metancentre is above e.g

C. when its meatcentric height is zero

D. none of the above

E. metacentre has nothing to do with position of e.g. for determining stability

207. The units of kinematic viscosity are_______________?
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A. newton-sec per meter

B. kg sec/meter

C. newton-sec per meter

D. none of the above

E. metres2 per sec
208. Free surface of a liquid behaves like a sheet and tends to contract to smallest possible area due to the______________?
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A. force of diffusion

B. force of friction

C. force of adhesion

D. force of cohesion

E. none of die above

209. The line of action of the buoyant force acts through the centroid of the ___________________?
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A. volume of the floating body

B. submerged body

C. displaced volume of the fluid

D. none of the above

E. volume of the fluid vertically above the body

210. In order to increase sensitivity of U-tube manometer, one leg is usually inclined by angle 9. Sensitivity of inclined tube to sensitivity of U-tube is equal to_________________?
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A. tan 9

B. sin 9

C. sin 9

D. casS

E. cos 9

211. For a body floating in a liquid the normal pressure exerted by the liquid acts at _________________?
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A. e.g. of the body

B. bottom surface of the body

C. all points on the surface of the body

D. metacentre

E. all of the above

212. Flow occurring in a pipeline when a valve is being opened is ______________________?
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A. rotational

B. steady

C. vortex

D. laminar

E. unsteady