CHEMICAL ENGINEERING | Chemical Engineering Thermodynamics

“When a gas is expanded from high pressure region to low pressure region ; temper -ature change occurs”. This phenomenon is related to the

Byadmin August 8, 2022

Question: “When a gas is expanded from high pressure region to low pressure region ; temper -ature change occurs”. This phenomenon is related to the
[A].

Gibbs-Duhem equation

[B].

Gibbs-Helmholtz equation

[C].

Third law of thermodynamics

[D].

Joule-Thomson effect

Answer: Option D

Explanation:

No answer description available for this question.

CHEMICAL ENGINEERING | Chemical Reaction Engineering

For series reaction, the relative yield

Question: For series reaction, the relative yield
[A].

is always greater for plug-flow reactor than for the single CSTR of the same volume.
[B].
statement in (a) is wrong.
[C].
decreases with increasing conversion.
[D].
both (a) and (c) hold good.

Answer: Option D

Explanation:

No answer description available for this question.

Read More For series reaction, the relative yield
CHEMICAL ENGINEERING | Chemical Engineering Basics

Work hardening of a material

Question: Work hardening of a material
[A].

decreases its tensile strength.
[B].
decreases its ductility.
[C].
increases its ductility.
[D].
does not affect its ductility.

Answer: Option B

Explanation:

No answer description available for this question.

Read More Work hardening of a material
CHEMICAL ENGINEERING | Heat Transfer

In a heat exchanger with steam outside the tubes, a liquid gets heated to 45°C, when its flow velocity in the tubes is 2 m/s. If the flow velocity is reduced to 1 m/s, other things remaining the same, the temperature of the exit liquid will be

Question: In a heat exchanger with steam outside the tubes, a liquid gets heated to 45°C, when its flow velocity in the tubes is 2 m/s. If the flow velocity is reduced to 1 m/s, other things remaining the same, the temperature of the exit liquid will be
[A].

less than 45°C
[B].
more than 45°C
[C].
equal to 45°C
[D].
initially decreases and remains constant thereafter.

Answer: Option B

Explanation:

No answer description available for this question.

Read More In a heat exchanger with steam outside the tubes, a liquid gets heated to 45°C, when its flow velocity in the tubes is 2 m/s. If the flow velocity is reduced to 1 m/s, other things remaining the same, the temperature of the exit liquid will be
CHEMICAL ENGINEERING | Materials and Construction

Chromel (Nichrome) is an alloy of

Question: Chromel (Nichrome) is an alloy of
[A].

chromium and molybdenum.
[B].
nickel and chromium.
[C].
molybdenum and nickel.
[D].
chromium and aluminium.

Answer: Option B

Explanation:

No answer description available for this question.

Read More Chromel (Nichrome) is an alloy of
CHEMICAL ENGINEERING | Chemical Process

Coloured glass is obtained by mixing of colored salts. Addition of __________ oxide is done to impart greenish blue color to the glass.

Question: Coloured glass is obtained by mixing of colored salts. Addition of __________ oxide is done to impart greenish blue color to the glass.
[A].

chromium
[B].
arsenic
[C].
copper
[D].
mangnese

Answer: Option C

Explanation:

No answer description available for this question.

Read More Coloured glass is obtained by mixing of colored salts. Addition of __________ oxide is done to impart greenish blue color to the glass.
CHEMICAL ENGINEERING | Chemical Engineering Basics

Brass parts with high residual tensile stress at the surface are susceptible to season cracking (i.e. spontaneous cracking occuring on exposure to atmospheric corrosion), if its zinc percentage is more than

Question: Brass parts with high residual tensile stress at the surface are susceptible to season cracking (i.e. spontaneous cracking occuring on exposure to atmospheric corrosion), if its zinc percentage is more than
[A].

5
[B].
10
[C].
20
[D].
35

Answer: Option C

Explanation:

No answer description available for this question.

Read More Brass parts with high residual tensile stress at the surface are susceptible to season cracking (i.e. spontaneous cracking occuring on exposure to atmospheric corrosion), if its zinc percentage is more than

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