72) When a pump is newly installed or when it has been dismantled for any repair etc., for proper functioning two important conditions must be fulfilled. The direction of rotation and priming before starting. Which pump does not need priming ?

Reciprocating pump

Jet pump

Submersible pump

Centrifugal pump

Answer is:

Submersible pump

The pump supplies too much water

The pump does not supply water

The pump motor runs too hot

The fuse in the motor circuit blows out

Answer is:

Level of water in sumps is too high

Impeller damaged

Pump is running in reverse direction

Motor running fast due to higher frequency

Answer is:

Initial cost high

Diameter is small

Requires skill for erection

In case of defect entire unit is to be lifted

Answer is:

Diameter is small

Very costly

Motor and pump are submerged in water

Motor and pump are connected through metal pipes

Answer is: