Mechanical Engineering - Hydraulic Machines

Exercise :: Hydraulic Machines - Section 1

41. 

The speed of an imaginary turbine, identical with the given turbine, which will develop a unit power under a unit head, is known as

A. normal speed
B. unit speed
C. specific speed
D. none of these

Answer: Option C

Explanation:

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42. 

For centrifugal pump impeller, the maximum value of the vane exit angle is

A. 10° to 15°
B. 15° to 20°
C. 20° to 25°
D. 25° to 30°

Answer: Option C

Explanation:

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43. 

In a reaction turbine, the pressure head of water, while flowing over the vanes, is converted into kinetic head before leaving the wheel.

A. Agree
B. Disagree

Answer: Option B

Explanation:

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44. 

Manometric head, in case of a centrifugal pump, is equal to

A. Suction lift + Loss of head in suction pipe due to friction + Delivery lift + Loss of head in delivery pipe due to friction + Velocity head in the delivery pipe
B. Workdone per kN of water - Losses within the impeller
C. Energy per kN at outlet of impeller - Energy per kN at inlet of impeller
D. all of the above

Answer: Option D

Explanation:

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45. 

The force exerted by a jet of water (in a direction normal to flow) impinging on a fixed plate inclined at an angle θ with the jet is

A.
B.
C.
D.

Answer: Option C

Explanation:

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