Mechanical Engineering - Hydraulics and Fluid Mechanics

41. 

The body will sink down if the force of buoyancy is __________ the weight of the liquid displaced.

A. equal to
B. less than
C. more than

Answer: Option B

Explanation:

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42. 

If a body floating in a liquid returns back to its original position, when given a small angular displacement, the body is said to be in

A. neutral equilibrium
B. stable equilibrium
C. unstable equilibrium
D. none of these

Answer: Option B

Explanation:

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43. 

The pressure measured with the help of a piezometer tube is in

A. N/mm2
B. N/m2
C. head of liquid
D. all of these

Answer: Option C

Explanation:

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44. 

The power transmitted through a pipe is (where w = Specific weight in N/m3, and Q = Discharge in m3/s)

A. w x Q x H
B. w x Q x hf
C. w x Q (H - hf)
D. w x Q (H + hf)

Answer: Option C

Explanation:

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45. 

In an external mouthpiece, the absolute pressure head at vena contracta is __________ the atmospheric pressure head by an amount equal to 0.89 times the height of the liquid, above the vena contracta.

A. less than
B. more than

Answer: Option A

Explanation:

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