Question: Keeping the pressure constant, to double the volume of a given mass of an ideal gas at 27°C, the temperature should be raised to __________ °C.
[A].

270

[B].

327

[C].

300

[D].

540

Answer: Option B

Explanation:

No answer description available for this question.

Question: With increase in compression ratio, the efficiency of the otto engine
[A].

increases

[B].

decreases

[C].

remains constant

[D].

increases linearly

Answer: Option A

Explanation:

No answer description available for this question.

Question: A nozzle is a device, which
[A].

increases kinetic energy and decreases pressure.

[B].

reduces kinetic energy and increases pressure.

[C].

reduces both kinetic energy and pressure.

[D].

increases both kinetic energy and pressure.

Answer: Option A

Explanation:

No answer description available for this question.

Question: With increase in reduced temperature, the fugacity co-efficient of a gas at constant reduced pressure
[A].

increases

[B].

decreases

[C].

remains same

[D].

decreases linearly

Answer: Option A

Explanation:

No answer description available for this question.

Question: Gibbs-Duhem equation relates composition in liquid phase and the __________ at constant temperature & pressure.
[A].

fugacity

[B].

partial pressure

[C].

activity co-efficient

[D].

(a), (b), and (c)

Answer: Option D

Explanation:

No answer description available for this question.

Question: In a turbine, the fluid expands almost
[A].

isothermally

[B].

isobarically

[C].

adiabatically

[D].

none of these

Answer: Option C

Explanation:

No answer description available for this question.

Question: In an ideal refrigeration cycle, the change in internal energy of the fluid is
[A].

+ve

[B].

-ve

[C].

0

[D].

either of the above three ; depends on the nature of refrigerant.

Answer: Option C

Explanation:

No answer description available for this question.

Question: Out of the following refrigration cycles, which one has the minimum COP (Co-efficient of performance)?
[A].

Air cycle

[B].

Carnot cycle

[C].

Ordinary vapour compression cycle

[D].

Vapour compression with a reversible expansion engine

Answer: Option A

Explanation:

No answer description available for this question.

Question: Joule-Thomson Co-efficient at any point on the inversion curve is
[A].

∞

[B].

+ ve

[C].

0

[D].

-ve

Answer: Option C

Explanation:

No answer description available for this question.

Question: Joule-Thomson co-efficient depends on the
[A].

pressure.

[B].

temperature.

[C].

both (a) & (b).

[D].

neither (a) nor (b).

Answer: Option C

Explanation:

No answer description available for this question.