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

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bDiesel cycle

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cAtkinson cycle

✓


dRankine cycle

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View Answer Atkinson cycle

Brayton cycle consists’ of following four processes____________________?


atwo isothermals and two isentropics

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btwo isentropics and two constant volumes

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ctwo isentropics, one constant volume and one constant pressure

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dtwo isentropics and two constant pres-sures

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


aOtto cycle

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bEricsson cycle

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cJoule cycle

✓


dStirling cycle

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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

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bless

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cequal

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ddepends on other factors

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View Answer equal

Carnot cycle is__________________?


aa reversible cycle (ft) an irreversible cycle

✓


ba semi-reversible cycle

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ca quasi static cycle

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dan adiabatic irreversible cycle

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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

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cefficiency depends on other factors

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dboth Otto and Diesel cycles are equally efficient

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Otto cycle consists of following four processes____________________?


atwo isothermals and two isentropics

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btwo isentropics and two constant volumes

✓


ctwo isentropics, one constant volume and one constant pressure

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dtwo isentropics and two constant pres-sures

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Thermal power plant works on______________?


aCarnot cycle

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bJoule cycle

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cRankine cycle

✓


dOtto cycle

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View Answer Rankine cycle

Kelvin Planck’s law deals with___________________?


aconservation of heat

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bconservation of work

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cconversion of heat into work

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dconversion fo work into heat

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The first law of thermodynamics is the law of_________________?


aconservation of mass

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bconservation of energy

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cconservation of momentum

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dconservation of heat

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