Chemical Engineering Basics

Question: In case of compression of one kg of air, the work done will be the least, when the value of polytropic index ‘n’ is
[A].

1

[B].

1.4

[C].

1.5

[D].

Y = Cp/Cv

Answer: Option A

Explanation:

No answer description available for this question.

Question: An approximately __________ process exemplifies the flow of a gas through a very long pipe of uniform cross-section.
[A].

adiabatic

[B].

isothermal

[C].

isentropic

[D].

isochoric

Answer: Option B

Explanation:

No answer description available for this question.

Question: Carnot cycle is also termed as the constant __________ cycle in thermodynamics.
[A].

entropy

[B].

pressure

[C].

volume

[D].

heat

Answer: Option D

Explanation:

No answer description available for this question.

Question: Work done by a/an __________ process is determined by.
[A].

adiabatic

[B].

quasi-static

[C].

isothermal

[D].

isentropic

Answer: Option B

Explanation:

No answer description available for this question.

Question: Maxwell’s thermodynamic relations applies to the
[A].

chemical systems in equilibrium.

[B].

mechanical systems in equilibrium.

[C].

irreversible thermodynamic processes.

[D].

reversible thermodynamic processes.

Answer: Option A

Explanation:

No answer description available for this question.

Question: In an isochoric process,
[A].

there is no transfer of mass and energy.

[B].

free expansion of an ideal gas occurs.

[C].

no mechanical work is done by the system.

[D].

all ‘a’, ‘b’ & ‘c’.

Answer: Option C

Explanation:

No answer description available for this question.

Question: Absolute zero, pressure will occur, when the molecular momentum of the system becomes zero. A liquid will cease to exist as liquid at
[A].

high vacuum

[B].

zero pressure

[C].

0°K

[D].

earth’s centre

Answer: Option B

Explanation:

No answer description available for this question.

Question: A gas having a negative Joule-Thompson co-efficient, when throttled, will
[A].

become hotter.

[B].

become cooler.

[C].

remain unchanged.

[D].

liquefy.

Answer: Option A

Explanation:

No answer description available for this question.

Question: Function of feed check valve in a boiler is to
[A].

facilitate circulation of high pressure feed water.

[B].

check the water level in the boiler drum.

[C].

prevent the back flow of water.

[D].

regulate the water flow to boiler.

Answer: Option C

Explanation:

No answer description available for this question.

Question: A fire tube boiler is limited to a maximum steam pressure of about __________ kg/cm2.
[A].

6

[B].

18

[C].

38

[D].

52

Answer: Option B

Explanation:

No answer description available for this question.