Hydraulics and Fluid Mechanics – Section 1


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31. The coefficient of viscosity may be determined by

A. capillary tube method
B. orifice type viscometer
C. rotating cylinder method
D. all of these

Correct Answer: D. all of these
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32. The stability of a dam is checked for

A. tension at the base
B. overturning of the wall or dam
C. sliding of the wall or dam
D. all of these

Correct Answer: D. all of these
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33. An ideal fluid is frictionless and incompressible.

A. Correct
B. Incorrect

Correct Answer: A. Correct
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34. A manometer is used to measure

A. low pressure
B. moderate pressure
C. high pressure
D. atmospheric pressure

Correct Answer: C. high pressure
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35. The center of gravity of the volume of the liquid displaced is called

A. center of pressure
B. center of buoyancy
C. metacenter
D. none of these

Correct Answer: B. center of buoyancy
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36. The coefficient of discharge for an external mouthpiece is

A. 0.375
B. 0.5
C. 0.707
D. 0.855

Correct Answer: D. 0.855
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37. A tank of uniform cross-sectional area (A) containing liquid upto height (H1) has an orifice of cross-sectional area (a) at its bottom. The time required to empty the tank completely will be

hfm-se1-37

Correct Answer: Option A
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38. A siphon is used to connect two reservoirs at different levels intervened by a high ridge.

A. True
B. False

Correct Answer: A. True
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39. A flow in which the volume of a fluid and its density does not change during the flow is called __________ flow.

A. incompressible
B. compressible

Correct Answer: A. incompressible
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40. The loss of head due to an obstruction in a pipe is twice the loss of head at its entrance.

A. Agree
B. Disagree

Correct Answer: A. Agree
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