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GATE Latest Exam Pattern - GATE Sample Question with Solutions : Unsolved Question Page 3

(#M40156979) GATE QUESTION Mechanical Engineering HM Keep an EYE

The relation between hydraulic efficiency (ηh), mechanical efficiency (ηm) and overall efficiency (ηo) ) is


A. ηh = ηo x ηm
B. ηm = ηo x ηh
C. ηo = ηh x ηm
D. none of these

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(#M40156978) GATE QUESTION Mechanical Engineering HM Keep an EYE

In a Francis turbine runner, the number of blades are generally between


A. 2 to 4
B. 4 to 8
C. 8 to l6
D. 16 to 24

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(#M40156977) GATE QUESTION Mechanical Engineering HM Keep an EYE

A Pelton wheel working under a constant head and discharge, has maximum efficiency when the speed ratio is


A. 0.26
B. 0.36
C. 0, 46
D. 0.56

Asked In Gate Jaspalsingh Parmar (8 years ago)

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(#M40156976) GATE QUESTION Mechanical Engineering HM Keep an EYE

If the ratio's of the corresponding forces acting at corresponding points are equal, then the model and the prototype are said to have.


A. geometric similarity
B. kinematic similarity
C. dynamic similarity
D. none of these

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(#M40156975) GATE QUESTION Mechanical Engineering HM Keep an EYE

In a Francis turbine, the pressure at inlet is __________ that at outlet.


A. less than
B. more than

Asked In Gate Jaspalsingh Parmar (8 years ago)

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(#M40156974) GATE QUESTION Mechanical Engineering HM Keep an EYE

In a reciprocating pump, air vessels are used to


A. smoothen the flow
B. reduce suction head
C. increase delivery head
D. reduce acceleration head

Asked In Gate Jaspalsingh Parmar (8 years ago)

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(#M40156973) GATE QUESTION Mechanical Engineering HM Keep an EYE

By fitting an air vessel to the reciprocating pump, there is always a saving of work done and subsequently saving of power.The saving in case of a double acting reciprocating pump is


A. 39.2%
B. 48.8%
C. 84.8%
D. 88.4%

Asked In Gate Jaspalsingh Parmar (8 years ago)

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(#M40156972) GATE QUESTION Mechanical Engineering HM Keep an EYE

The overall efficiency of an impulse turbine is the ratio of the actual power produced by the turbine to the energy actually supplied by the turbine.


A. Yes
B. No

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(#M40156971) GATE QUESTION Mechanical Engineering HM Keep an EYE

Which of the following pump is generally used to pump highly viscous fluid?


A. Centrifugal pump
B. Reciprocating pump
C. Air lift pump
D. Screw pump

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(#M40156970) GATE QUESTION Mechanical Engineering HM Keep an EYE

A Pelton wheel with one nozzle is preferred for a specific speed between 35 to 60 r.p.m.


A. True
B. False

Asked In Gate Jaspalsingh Parmar (8 years ago)

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