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GATE Latest Exam Pattern - GATE Sample Question with Solutions Page 4

(#M40156969) GATE QUESTION Engineering HM Keep an EYE

In a mixed flow reaction turbine, the flow of water is partly radial and partly axial.


A. Correct
B. Incorrect

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(#M40156968) GATE QUESTION Engineering HM Keep an EYE

The discharge through a reaction turbine __________ with the increase in unit speed.


A. remains same
B. increases
C. decreases

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(#M40156967) GATE QUESTION Engineering HM Keep an EYE

A hydraulic intensifier is a device used to increase the intensity of pressure of water by means of energy available from a large quantity of water at a low pressure.


A. Correct
B. Incorrect

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(#M40156966) GATE QUESTION Engineering HM Keep an EYE

In order to avoid cavitation in centrifugal pumps


A. the suction pressure should be high
B. the delivery pressure should be high
C. the suction pressure should be low
D. the delivery pressure should be low

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(#M40156965) GATE QUESTION Engineering HM Keep an EYE

The working of which of the following hydraulic units is based on Pascal's law?


A. Air lift pump
B. Jet pump
C. Hydraulic coupling
D. Hydraulic press

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(#M40156964) GATE QUESTION Engineering HM Keep an EYE

In an inward flow reaction turbine


A. the water flows parallel to the axis of the wheel
B. the water enters at the centre of the wheel and then flows towards the outer periphery of the wheel
C. the water enters the wheel at the outer periphery and then flows towards the centre of the wheel
D. the flow of water is partly radial and partly axial

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(#M40156963) GATE QUESTION Engineering HM Keep an EYE

Overall efficiency of a centrifugal pump is the ratio of


A. energy available at the impeller to the energy supplied to the pump by the prime mover
B. actual workdone by the pump to the energy supplied to the pump by the prime mover
C. energy supplied to the pump to the energy available at the impeller
D. manometric head to the energy supplied by the impeller per kN of water

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(#M40156962) GATE QUESTION Engineering HM Keep an EYE

A hydraulic ram is a device used to


A. store the energy of water
B. increase the pressure of water
C. to lift water from deep wells
D. to lift small quantity of water to a greater height when a large quantity of water is available at a smaller height

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(#M40156961) GATE QUESTION Engineering HM Keep an EYE

A draft tube is used with impulse turbines.


A. Yes
B. No

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(#M40156960) GATE QUESTION Engineering HM Keep an EYE

The flow ratio of Francis turbine is defined as the ratio of the


A. velocity of flow at inlet to the theoretical jet velocity
B. theoretical velocity of jet to the velocity of flow at inlet
C. velocity of runner at inlet to the velocity of flow at inlet
D. none of the above

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