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GATE Latest Exam Pattern - GATE Sample Question with Solutions Page 7

(#M40156938) GATE QUESTION Engineering HM Keep an EYE

Work done by a turbine __________ upon the weight of water flowing per second.


A. depends
B. does not depend

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(#M40156937) GATE QUESTION Engineering HM Keep an EYE

The overall efficiency of a reaction turbine is the ratio of


A. power produced by the turbine to the energy actually supplied by the turbine
B. actual work available at the turbine to the energy imparted to the wheel
C. workdone on the wheel to the energy (or head of water) actually supplied to the turbine
D. none of the above

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(#M40156936) GATE QUESTION Engineering HM Keep an EYE

The speed ratio of a Francis turbine is defined as the ratio of the theoretical jet velocity to the peripheral speed at inlet.


A. Yes
B. No

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(#M40156935) GATE QUESTION Engineering HM Keep an EYE

Which of the following turbine is preferred for 0 to 25 m head of water?


A. Pelton wheel
B. Kaplan turbine
C. Francis turbine
D. none of these

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(#M40156934) GATE QUESTION Engineering HM Keep an EYE

Delivery head of water of a centrifugal pump is inversely proportional to diameter of its impeller.


A. Yes
B. No

Asked In Gate Jaspalsingh Parmar (9 years ago)

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(#M40156933) GATE QUESTION Engineering HM Keep an EYE

The discharge of a centrifugal pump working under constant head __________ with the speed.


A. increases
B. decreases

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(#M40156932) GATE QUESTION Engineering HM Keep an EYE

The efficiency of a Pelton wheel working under constant head __________ with the increase in power.


A. remains same
B. increases
C. decreases

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(#M40156931) GATE QUESTION Engineering HM Keep an EYE

Which of the following pump is preferred for flood control and irrigation applications?


A. Centrifugal pump
B. Axial flow pump
C. Mixed flow pump
D. Reciprocating pump

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(#M40156930) GATE QUESTION Engineering HM Keep an EYE

The specific speed of a centrifugal pump, delivering 750 litres of water per second against a head of 15 metres at 725 r.p.m., is


A. 24.8 r.p.m.
B. 48.2 r.p.m
C. 82.4 r.p.m.
D. 248 r.p.m

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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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