Mechanical Engineering - Hydraulic Machines

Exercise :: Hydraulic Machines - Section 1

36. 

A Francis turbine is used when the available head of water is

A. 0 to 25 m
B. 25 m to 250 m
C. above 250 m
D. none of these

Answer: Option B

Explanation:

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37. 

The specific speed from 160 to 500 r.p.m. of a centrifugal pump indicates that the pump is

A. slow speed with radial flow at outlet
B. medium speed with radial flow at outlet
C. high speed with radial flow at outlet
D. high speed with axial flow at outlet

Answer: Option D

Explanation:

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38. 

A hydraulic coupling belongs to the category of

A. power absorbing machines
B. power developing machines
C. energy transfer machines
D. energy generating machines

Answer: Option C

Explanation:

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39. 

The principle of jet propulsion is used in driving the ships and aeroplanes.

A. Correct
B. Incorrect

Answer: Option A

Explanation:

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40. 

In the casing of a centrifugal pump, the kinetic energy of the water is converted into pressure energy before the water leaves the casing.

A. True
B. False

Answer: Option A

Explanation:

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