Engineering :: Hydraulics Machines

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91.

Multi-stage centrifugal pumps are used to

A.	give high discharge	B.	produce high heads
C.	pump viscous fluids	D.	all of these

92.

Which of the following statement is correct?

A.	The centrifugal pump is suitable for large discharge and smaller heads	B.	The centrifugal pump required 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 of the above

93.

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

A.	kinetic head	B.	velocity head
C.	manometric head	D.	static head

94.

A reciprocating pump is suitable for less discharge and higher heads.

True

False

95.

A reciprocating pump is also called a

positive

negative

96.

Slip of a reciprocating pump is defined as the

A.	ratio of actual discharge to the theoretical discharge	B.	sum of actual discharge and the theoretical discharge
C.	difference of theoretical discharge and the actual discharge	D.	product of theoretical discharge and the actual discharge

97.

Slip of a reciprocating pump is negative, when

A.	suction pipe is short and pump is running at low speeds	B.	delivery pipe is long and pump is running at high speeds
C.	suction pipe is short and delivery pipe is long and the pump is running at low speeds	D.	suction pipe is long and delivery pipe is short and the pump is running at high speeds

98.

Head developed by a centrifugal pump is

A.	proportional to diameter of impeller	B.	proportional to speed of impeller
C.	proportional to diameter and speed of impeller	D.	none of the above

99.

In a mixed flow centrifugal pump, the flow through the impeller is a combination of radial and axial flows.

Correct

Incorrect

100.

The air vessel, in a reciprocating pump, is a cast iron closed chamber having an opening at its base.

Agree

Disagree