Mechanical Engineering MCQs

Page No. 111

Pick up the incorrect statement?


alithium bromide used in vapour absorption cycle is nonvolatile


blithium bromide plant can’t operate below 0°C


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


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



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


aheat exchange process


bthrottling process


cisentropic process


dhyperbolic process


View Answer hyperbolic process

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


aconstant pressure


bconstant temperature


cconstant volume


dconstant entropy


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


bpressure


ctemperature


denthalpy


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


b327°C


c108°C


d654°C


View Answer 327°C

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


areversible process


bisothermal process


cadiabatic process


dirreversible process


View Answer isothermal process

Heat and work are ____________________?


apoint functions


bsystem properties


cpath functions


dintensive properties


View Answer path functions

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


aheat


bwork


ckinetic energy


dthermal conductivity


View Answer thermal conductivity

On weight basis, air contains following parts of oxygen_________________?


a21


b23


c25


d73


View Answer 23

Mixture of ice and water form a________________________?


aclosed system


bopen system


cisolated system


dheterogeneous system


View Answer heterogeneous system

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