Mechanical Engineering - Hydraulics and Fluid Mechanics

41. 

The discharge through a small rectangular orifice is given by (where Cd = Coefficient of discharge for the orifice, a = Cross-sectional area of the orifice, h = Height of the liquid above the centre of the orifice)

A. Q = Cd x a x 2gh
B.
C.
D.

Answer: Option A

Explanation:

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42. 

The siphon will work satisfactorily, if the minimum pressure in the pipe is __________ vapour pressure of liquid.

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

Answer: Option C

Explanation:

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43. 

The difference between the notch and weir is that the notch is of bigger size and the weir is of a smaller size.

A. Agree
B. Disagree

Answer: Option B

Explanation:

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44. 

An open tank containing liquid is moving with an acceleration on an inclined plane. The inclination of the free surface of the liquid will be __________ to the acceleration of the tank.

A. equal to
B. directly proportional
C. inversely proportional

Answer: Option B

Explanation:

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45. 

Euler's number is the ratio of __________ force to pressure force.

A. inertia
B. gravity
C. viscous

Answer: Option A

Explanation:

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