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 : 64
The depth of the bucket for a Pelton wheel is generally ________ the diameter of jet.

Equal to

1.2 times

1.8 times

Double

Question No : 65
Which of the following pump is preferred for flood control and irrigation applications?

Centrifugal pump

Axial flow pump

Mixed flow pump

Reciprocating pump

Question No : 66
The width of the bucket for a Pelton wheel is generally ________ the diameter of jet.

Double

Three times

Four times

Five times

Question No : 67
Mechanical efficiency of a centrifugal pump is the ratio of

Energy available at the impeller to the energy supplied to the pump by the prime mover

Actual workdone by the pump to the energy supplied to the pump by the prime mover

Energy supplied to the pump to the energy available at the impeller

Manometric head to the energy supplied by the impeller per kN of water

Question No : 68
Runaway speed of a hydraulic turbine is

Full load speed

The speed at which turbine runner will be damaged

The speed if the turbine runner is allowed to revolve freely without load and with the wicket gates wide open

The speed corresponding to maximum overload permissible

Question No : 69
Which of the following turbine is preferred for 0 to 25 m head of water?

Pelton wheel

Kaplan turbine

Francis turbine

None of these

Question No : 70
In a centrifugal pump casing, the flow of water leaving the

Radial

Axial

Centrifugal

Vortex