The ratio of power output of the pump to the power input to the pump is known asa)mechanical efficiencyb)overall efficiencyc)manometric efficiencyd)Pump efficiencyCorrect answer is option 'B'. Can you explain this answer?

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The ratio of power output of the pump to the power input to the pump is known as

a)
mechanical efficiency
b)
overall efficiency
c)
manometric efficiency
d)
Pump efficiency

Correct answer is option 'B'. Can you explain this answer?

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The ratio of power output of the pump to the power input to the pump i...

Manometric Efficiency (ηman)-
The ratio of the manometric head to the head imparted by the impeller to the water is known as manometric efficiency. Mathematically, it is written as-

The power at the impeller of the pump is more than the power given to the water at the outlet of the pump.
The ratio of the power given to water at the outlet of the pump to the power available at the impeller, is known as manometric efficiency.
The power given to water at the outlet of the pump
The power at the impeller

Mechanical Efficiency (ηm)-
The power at the shaft of the centrifugal pump is more than the power available at the impeller of the pump.
The ratio of the power available at the impeller to the power at the shaft of the centrifugal pump is known as mechanical efficiency.
It is written as

The power at the impeller in kW =

[Where S.P. =Shaft power]
Overall Efficiency (ηo)-
It is defined as the ratio of the power output of the pump to the power input to the pump.
The power output of the pump in kW =

Power input to the pump = Power supplied by the electric motor = S.P. of the pump

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