Gearup-JE'19: Thermodynamics Quiz-1

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Question 1

As the pressure increases, the saturation temperature of the vapour

• Aincreases
• Bdecreases
• Cincreases first and then decreases
• Ddecreases first and then increases

Question 2

On a pressure volume diagram, the process line PVⁿ = C (as the value of ‘n’ increases) will ____________.

• Acome closer to y-axis
• Bcome closer to x-axis
• Ccome closer to 45 inclined line
• Dremain in the same position

Question 3

According to kinetic theory of gases, at absolute zero ___________.

• ASpecific heat of molecules reduces to zero
• BKinetic energy of molecules reduces to zero
• CVolume of gas reduce to zero
• DPressure of gas reduce to zero

Question 4

At triple point of a pure substance _____.

• ALiquid and vapour phase co-exist
• BSolid and vapour phase co-exist
• CLiquid and solid phase co-exist
• DSolid, Liquid and vapour phase co-exist.

Question 5

The specific heat at constant pressure is given by:

• A
• B
• C
• D

Question 6

If a heat engine gives a output of 3 kW when the input is 10000 J/sec. then the thermal efficiency of the engine will be:

• A20%
• B30%
• C70%
• D76.7%

Question 7

Which law of thermodynamics will be violated, if the thermal efficiency of an engine becomes 100%?

• AZeroth law
• BFirst law
• CSecond law
• DThird law

Question 8

Clausius inequality is stated as:

• A
• B
• C≥0
• D

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