Mechanical Engineering MCQs

Page No. 169

The flow rate in gear pump___________________?


aincreases with increase in pressure

✖


bdecreases with increase in pressure

✖


cmore or less remains constant with in-crease in pressure

✓


dunpredictable

✖



Guide angle as per the aerofoil theory of Kaplan turbine blade design is defined as the angle between_________________?


alift and resultant force

✓


bdrag and resultant force

✖


clift and tangential force

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dlift and drag

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Casting of a centrifugal pump is designed so as to minimize________________?


afriction loss

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bcavitation

✖


cstatic head

✖


dloss of kinetic energy

✓



High specific speed of turbine implies it is__________________?


apropeller turbine

✓


bFrancis turbine

✖


cimpulse turbine

✖


dany one of the above

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View Answer propeller turbine

The maximum number of jets generally employed in impulse turbine without jet interference is________________?


a4

✖


b6

✓


c8

✖


d12

✖


View Answer 6

Any change in load is adjusted by adjusting following parameter on turbine______________?


anet head

✖


babsolute velocity

✖


cblade velocity

✖


dflow

✓


View Answer flow

Indicator diagram of a reciprocating pump is a graph between________________?


aflow vs swept volume

✖


bpressure in cylinder vs swept volume

✓


cflow vs speed

✖


dpressure vs speed

✖



Medium specific speed of a pump implies it is_________________?


acentrifugal pump

✖


bmixed flow pump

✓


caxial flow pump

✖


dany one of the above

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View Answer mixed flow pump

Motion of a liquid in a volute casing of a centrifugal pump is an example of____________________?


arotational flow

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bradial

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cforced spiral vortex flow

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dspiral vortex flow

✓


View Answer spiral vortex flow

The horse power required in above case will be___________________?


asame

✖


b0.75 B.H.P.

✓


cB.H.P./0.75

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d1.5 B.H.P.

✖


View Answer 0.75 B.H.P.

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