Hydraulics & Fluid Machineries MCQ Question with Answer

Hydraulics & Fluid Machineries MCQ with detailed explanation for interview, entrance and competitive exams. Explanation are given for understanding.

Question No : 57
Centrifugal pump is started with its delivery valve

Kept fully closed

Kept fully open

Irrespective of any position

Kept 50% open

Question No : 58
Motion of a liquid in a volute casing of a centrifugal pump is an example of

Rotational flow

Radial

Forced spiral vortex flow

Spiral vortex flow

Question No : 59
The Fourneyron turbine is _________ reaction turbine.

An axial flow

An inward flow

An outward flow

A mixed flow

Question No : 60
Kinematic similarity is said to exist between the model and the prototype, if both of them

Have identical velocities

Are equal in size and shape

Are identical in shape, but differ only in size

Have identical forces

Question No : 61
Which of the following statement is correct?

The centrifugal pump is suitable for large discharge and smaller heads.

The centrifugal pump requires less floor area and simple foundation as compared to reciprocating pump.

The efficiency of centrifugal pump is less as compared to reciprocating pump.

All of the above

Question No : 62
According to fan laws, for fans having constant wheel diameter, the air or gas capacity varies

Directly as fan speed

Square of fan speed

Cube of fan speed

Square root of fan speed

Question No : 63
One horsepower is equal to

102 watts

75 watts

550 watts

735 watts