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(#M40156952) GATE QUESTION Engineering HM Keep an EYE

Manometric head, in case of a centrifugal pump, is equal to


A. Suction lift + Loss of head in suction pipe due to friction + Delivery lift + Loss of head in delivery pipe due to friction + Velocity head in the delivery pipe
B. Workdone per kN of water - Losses within the impeller
C. Energy per kN at outlet of impeller - Energy per kN at inlet of impeller
D. all of the above

Asked In Gate Jaspalsingh Parmar (9 years ago)

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(#M40156951) GATE QUESTION Engineering HM Keep an EYE

In a reaction turbine, the pressure head of water, while flowing over the vanes, is converted into kinetic head before leaving the wheel.


A. Agree
B. Disagree

Asked In Gate Jaspalsingh Parmar (9 years ago)

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(#M40156950) GATE QUESTION Engineering HM Keep an EYE

For centrifugal pump impeller, the maximum value of the vane exit angle is


A. 10° to 15°
B. 15° to 20°
C. 20° to 25°
D. 25° to 30°

Asked In Gate Jaspalsingh Parmar (9 years ago)

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(#M40156949) GATE QUESTION Engineering HM Keep an EYE

The speed of an imaginary turbine, identical with the given turbine, which will develop a unit power under a unit head, is known as


A. normal speed
B. unit speed
C. specific speed
D. none of these

Asked In Gate Jaspalsingh Parmar (9 years ago)

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(#M40156947) GATE QUESTION Engineering HM Keep an EYE

In the casing of a centrifugal pump, the kinetic energy of the water is converted into pressure energy before the water leaves the casing.


A. True
B. False

Asked In Gate Jaspalsingh Parmar (9 years ago)

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(#M40156946) GATE QUESTION Engineering HM Keep an EYE

The principle of jet propulsion is used in driving the ships and aeroplanes.


A. Correct
B. Incorrect

Asked In Gate Jaspalsingh Parmar (9 years ago)

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(#M40156945) GATE QUESTION Engineering HM Keep an EYE

A hydraulic coupling belongs to the category of


A. power absorbing machines
B. power developing machines
C. energy transfer machines
D. energy generating machines

Asked In Gate Jaspalsingh Parmar (9 years ago)

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(#M40156944) GATE QUESTION Engineering HM Keep an EYE

The specific speed from 160 to 500 r.p.m. of a centrifugal pump indicates that the pump is


A. slow speed with radial flow at outlet
B. medium speed with radial flow at outlet
C. high speed with radial flow at outlet
D. high speed with axial flow at outlet

Asked In Gate Jaspalsingh Parmar (9 years ago)

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(#M40156942) GATE QUESTION Engineering HM Keep an EYE

When the speed of the pump increases, its net positive suction head (NPSH) requirement decreases.


A. Agree
B. Disagree

Asked In Gate Jaspalsingh Parmar (9 years ago)

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(#M40156941) GATE QUESTION Engineering HM Keep an EYE

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

Asked In Gate Jaspalsingh Parmar (9 years ago)

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