Mechanical Engineering MCQs

Page No. 107

The cycle in which heat is supplied at constant volume and rejected at constant pressure is known as_________________?


aDual combustion cycle


bDiesel cycle


cAtkinson cycle


dRankine cycle


View Answer Atkinson cycle

Brayton cycle consists’ of following four processes____________________?


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 pres-sures



A cycle consisting of two adiabatics and two constant pressure processes is known as___________________?


aOtto cycle


bEricsson cycle


cJoule cycle


dStirling cycle


View Answer Joule cycle

If both Stirling and Carnot cycles operate within the same temperature limits, then efficiency of Stirling cycle as compared to Carnot cycle___________________?


amore


bless


cequal


ddepends on other factors


View Answer equal

Carnot cycle is__________________?


aa reversible cycle (ft) an irreversible cycle


ba semi-reversible cycle


ca quasi static cycle


dan adiabatic irreversible cycle



For same compression ratio and for same heat added_________________?


aOtto cycle is more efficient than Diesel cycle


bDiesel cycle is more efficient than Otto cycle


cefficiency depends on other factors


dboth Otto and Diesel cycles are equally efficient



Otto cycle consists of following four processes____________________?


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 pres-sures



Thermal power plant works on______________?


aCarnot cycle


bJoule cycle


cRankine cycle


dOtto cycle


View Answer Rankine cycle

Kelvin Planck’s law deals with___________________?


aconservation of heat


bconservation of work


cconversion of heat into work


dconversion fo work into heat



The first law of thermodynamics is the law of_________________?


aconservation of mass


bconservation of energy


cconservation of momentum


dconservation of heat



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