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(#M40156929) GATE QUESTION Engineering HM Keep an EYE

Multi-stage centrifugal pumps are used to


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

Asked In Gate Jaspalsingh Parmar (9 years ago)

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(#M40156928) GATE QUESTION Engineering HM Keep an EYE

The efficiency of a centrifugal pump will be maximum when the blades are bent backward.


A. Yes
B. No

Asked In Gate Jaspalsingh Parmar (9 years ago)

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(#M40156927) GATE QUESTION Engineering HM Keep an EYE

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

Asked In Gate Jaspalsingh Parmar (9 years ago)

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(#M40156926) GATE QUESTION Engineering HM Keep an EYE

The power produced by the reaction turbine is __________ to the head of water.


A. directly proportional
B. inversely proportional

Asked In Gate Jaspalsingh Parmar (9 years ago)

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(#M40156925) HR INTERVIEW QUESTION Engineering HM Keep an EYE

In a reaction turbine, the draft tube is used


A. to run the turbine full
B. to prevent air to enter the turbine
C. to increase the head of water by an amount equal to the height of the runner outlet above the tail race
D. to transport water to downstream

Asked In HR Interview Jaspalsingh Parmar (9 years ago)

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(#M40156924) HR INTERVIEW QUESTION Engineering HM Keep an EYE

Discharge of a centrifugal pump is (where N = Speed of the pump impeller)


A. directly proportional to N
B. inversely proportional to N
C. directly proportional to N2
D. inversely proportional to N2

Asked In HR Interview Jaspalsingh Parmar (9 years ago)

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(#M40156922) HR INTERVIEW QUESTION Engineering HM Keep an EYE

The ratio of actual work available at the turbine to the energy imparted to the wheel is known as __________ efficiency.


A. hydraulic
B. mechanical
C. overall

Asked In HR Interview Jaspalsingh Parmar (9 years ago)

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(#M40156921) HR INTERVIEW QUESTION Engineering HM Keep an EYE

The static head of a centrifugal pump is equal to the __________ of suction head and delivery head.


A. product
B. difference
C. sum

Asked In HR Interview Jaspalsingh Parmar (9 years ago)

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(#M40156920) HR INTERVIEW QUESTION Engineering HM Keep an EYE

A Pelton wheel develops 1750 kW under a head of 100 metres while running at 200 r.p.m. and discharging 2500 litres of water per second. The unit power of the wheel is


A. 0.25 kW
B. 0.75 kW
C. 1.75 kW
D. 3.75 kW

Asked In HR Interview Jaspalsingh Parmar (9 years ago)

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(#M40156919) HR INTERVIEW QUESTION Engineering HM Keep an EYE

Discharge of a centrifugal pump is


A. directly proportional to diameter of its impeller
B. inversely proportional to diameter of its impeller
C. directly proportional to (diameter)2 of its impeller
D. inversely proportional to (diameter)2 of its impeller

Asked In HR Interview Jaspalsingh Parmar (9 years ago)

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