August 2022

Question: All gases except __________ shows a cooling effect during throttling process at atmospheric temperature and pressure.
[A].

oxygen

[B].

nitrogen

[C].

air

[D].

hydrogen

Answer: Option D

Explanation:

No answer description available for this question.

Question: In case of an __________ process, the temperature of the system increases.
[A].

isothermal compression

[B].

isothermal expansion

[C].

adiabatic expansion

[D].

adiabatic compression

Answer: Option D

Explanation:

No answer description available for this question.

Question: __________ does not change during phase transformation processes like sublimation, melting & vaporisation.
[A].

Entropy

[B].

Gibbs free energy

[C].

Internal energy

[D].

all (a), (b) & (c)

Answer: Option B

Explanation:

No answer description available for this question.

Question: Which of the following processes can not be made reversible even under ideal condition of operation?
[A].

Free expansion of a gas.

[B].

Compression of air in a compressor.

[C].

Expansion of steam in a turbine.

[D].

all (a), (b) & (c).

Answer: Option A

Explanation:

No answer description available for this question.

Question: Filling of gas from a high pressure cylinder into small bottles is an example of a/an __________ process.
[A].

equilibrium

[B].

adiabatic

[C].

steady

[D].

unsteady

Answer: Option D

Explanation:

No answer description available for this question.

Question: A solid is transformed into vapour without going to the liquid phase at
[A].

triple point

[B].

boiling point

[C].

below triple point

[D].

always

Answer: Option A

Explanation:

No answer description available for this question.

Question: Maxwell’s relation corresponding to the identity, dH = dS = Vdp + ∑μidni is
[A].

[B].

[C].

[D].

Answer: Option D

Explanation:

No answer description available for this question.

Question: A Carnot cycle consists of the following steps :
[A].

Two isothermals and two isentropics.

[B].

Two isobarics and two isothermals.

[C].

Two isochorics and two isobarics.

[D].

Two isothermals and two isochorics.

Answer: Option A

Explanation:

No answer description available for this question.