48) The ratio of quantity of liquid discharged per second from the pump to the quantity of liquid passing per second through the impeller is known as

manometric efficiency

mechanical efficiency

overall efficiency

volumetric efficiency

Answer is:

volumetric efficiency

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49) Multi stage centrifugal pumps are used to

give high discharge

produce high heads

pump viscous fluids

all of these

Answer is:

produce high heads

50) 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

Answer is:

all of the above

51) A centrifugal pump will start delivering liquid only when the pressure rise in the impeller is equal to the

kinetic head

velocity head

manometric head

static head

Answer is:

manometric head

52) A reciprocating pump is also called a _____ displacement pump.

Positive

Negative

Zero

None of the above

Answer is:

Positive

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48) The ratio of quantity of liquid discharged per second from the pump to the quantity of liquid passing per second through the impeller is known as

volumetric efficiency

Hydraulic Machines MCQ with Answers

Related Hydraulic Machines MCQ with Answers

49) Multi stage centrifugal pumps are used to

produce high heads

50) Which of the following statement is correct ?

all of the above

51) A centrifugal pump will start delivering liquid only when the pressure rise in the impeller is equal to the

manometric head

52) A reciprocating pump is also called a _____ displacement pump.

Positive

Hydraulic Machines MCQ with Answers