Mechanical Engineering MCQs

Page No. 111

Pick up the incorrect statement?


alithium bromide used in vapour absorption cycle is nonvolatile

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blithium bromide plant can’t operate below 0°C

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ca separator is used in lithium bromide plant to remove the unwanted water vapour by condensing

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dconcentration of solution coming out of lithium bromide generator is more in comparison to that entering the generator

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A heat exchange process in which the product of pressure and volume remains constant is known as_______________?


aheat exchange process

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bthrottling process

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cisentropic process

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dhyperbolic process

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View Answer hyperbolic process

Change in enthalpy of a system is the heat supplied at___________________?


aconstant pressure

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bconstant temperature

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cconstant volume

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dconstant entropy

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View Answer constant pressure

If value of n is infinitely large in a polytropic process pV” = C, then the process is known as constant_____________________?


avolume

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bpressure

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ctemperature

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denthalpy

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View Answer volume

A perfect gas at 27°C is heated at constant pressure till its volume is double. The final temperature is________________?


a54°C

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b327°C

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c108°C

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d654°C

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View Answer 327°C

The value of n = 1 in the poly tropic process indicates it to be __________________?


areversible process

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bisothermal process

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cadiabatic process

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dirreversible process

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View Answer isothermal process

Heat and work are ____________________?


apoint functions

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bsystem properties

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cpath functions

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dintensive properties

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View Answer path functions

Which of the following items is not a path function ____________________?


aheat

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bwork

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ckinetic energy

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dthermal conductivity

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View Answer thermal conductivity

On weight basis, air contains following parts of oxygen_________________?


a21

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b23

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c25

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d73

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View Answer 23

Mixture of ice and water form a________________________?


aclosed system

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bopen system

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cisolated system

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dheterogeneous system

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View Answer heterogeneous system

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