Gearup-JE'19: Thermodynamics Quiz-2

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Question 1

Slope of constant pressure line on temperature entropy diagram is given by.

• A
• B
• C
• D

Question 2

Increase in entropy of a system represents ________.

• Aincrease in availability of energy
• Bincrease in temperature
• Cdecrease in pressure
• Ddegradation of energy.

Question 3

For reversible adiabatic process, change is entropy is

• Amaximum
• Bminimum
• Czero
• DUnpredictable

Question 4

The relation where s represents entropy, Q represents heat and T represents temperature (absolute), holds good in which one of the following processes?

• AReversible processes only
• BIrreversible processes only
• CBoth reversible and irreversible processes
• DAll real process

Question 5

Carnot cycle efficiency depends upon __________.

• Aproperties of the medium/substance used
• Bcondition of engine
• Cworking condition
• Dtemperature range of operation

Question 6

Following relationship defines the Gibb’s free energy G

• AG = H + TS
• BG = H – TS
• CG = U + TS
• DF = U – TS

Question 7

The four process of the Carnot cycles are ___________.

• ATwo reversible adiabatic and two reversible isobaric process
• BTwo reversible isothermal and two reversible isentropic process.
• CAll four are isentropic processes
• DTwo reversible isochoric processes and two reversible isobaric process

Question 8

For a heat engine operating on the Carnot cycle, the work output is th of the heat transferred to the sink. The efficiency of the engine is

• A20 %
• B33.3 %
• C40%
• D50%

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