Mechanical Engineering MCQs

Page No. 106

Stirling and Ericsson cycles are__________________?


areversible cycles


birreversible cycles


cquasi-static cycles


dsemi-reversible cycles


View Answer reversible cycles

Reversed joule cycle is called_________________?


aCarnot cycle


bRankine cycle


cBrayton cycle


dBell Coleman cycle


View Answer Brayton cycle

Which of the following cycles is not a reversible cycle_____________________?


aCarnot


bEricsson


cStirling


dnone of the above


View Answer none of the above

The efficiency of Diesei cycle with decrease in cut off_________________?


aincreases


bdecreases


cremains unaffected


dfirst increases and then decreases


View Answer increases

The thermodynamic difference between a Rankine cycle working with saturated steam and the Carnot cycle is that___________________?


acarnot cycle can’t work with saturated steam


bheat is supplied to water at temperature below the maximum temperature of the cycle


ca rankine cycle receives heat at two places


drankine cycle is hypothetical



The following cycle is used for air craft refrigeration___________________?


aBrayton cycle


bJoule cycle


cCarnot cycle


dReversed-Brayton cycle



The ideal efficiency of a Brayton cycle without regeneration with increase ni pressure ratio will_________________?


aincrease


bdecrease


cremain unchanged


dincrease/decrease depending on application


View Answer increase

Gas turbine cycle consists of___________________?


atwo isothermals and two isentropics


btwo isentropics and two constant volumes


ctwo isentropics, one constant volume and one constant pressure


dtwo isentropics and two constant pressures



The ideal efficiency of a Brayton cycle with regeneration, with increase in pressure ratio will______________?


aincrease


bdecrease


cremain unchanged


dincrease/decrease depending on ap-plication


View Answer decrease

Which of the following cycles has maximum efficiency_____________?


aRankine


bStirling


cCarnot


dBrayton


View Answer Carnot

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