MCQ on centrifugal Pump

 MCQ on centrifugal Pump 

Centrifugal Pump

 a: The centrifugal pump is suitable for large discharge and smaller heads b: The centrifugal pump requires less floor area and simple foundation as compared to reciprocating pump c: The efficiency of centrifugal pump is less as compared to reciprocating pump d: All the above

Delivery valve while starting centrifugal pump is kept

 a: Fully open b: Fully closed c: Half open d: In any position

The correct sequence of the centrifugal pump components through which the fluid flows is

 a: Impeller, Suction pipe, Foot valve and strainer, Delivery pipe b: Foot valve and strainer, Suction pipe, Impeller, Delivery pipe c: Impeller, Suction pipe, Delivery pipe, Foot valve strainer d: Suction pipe, Delivery pipe, Impeller, Foot valve and strainer

A centrifugal pump gives maximum efficiency when its blades are ____

 a: Bent forward b: Bend backward c: Straight d: Wave shaped

The net positive suction head (NPSH) of a centrifugal pump is defined as the sum of the velocity head and the pressure head at the

 a: Suction b: Discharge c: Suction minus vapour pressure of the liquid at suction temperature d: Discharge minus vapour pressure of the liquid at the discharge temperatureIn a centrifugal pump, the regulating valve is provided on the

 a: Casing b: Delivery pipe c: Suction pipe d: Impeller

Which type of vanes is suitable for high speed runners?

 a: Forward facing vanes b: Radial vanes c: Backward facing vanes d: None of the above

The efficiency of a pump is generally less than that of a turbine.(Say true or false)

 a: True b: False

The volute casing of a centrifugal pump has which of the following functions?
1.Eliminating loss of head due to change in velocity after exit from Impeller
2.Directs the flow towards the delivery pipe
3.Converts a part of the velocity head to pressure head
4.Gives a constant velocity of flow

 a: 1, 2 and 4 b: 2 and 3 only c: 1 and 4 only d: 2 and 4 only

Which one of the following is the correct statement for a given centrifugal pump?

 a: The discharge varies directly as the speed b: The head varies inversely as the speed c: The power varies as the square of the speed d: The discharge varies as the square of the speed