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CHEMICAL ENGINEERING

The advantage of backward feed multiple effect evaporators over forward feed units is that

CHEMICAL ENGINEERING, Heat Transfer /
Question: The advantage of backward feed multiple effect evaporators over forward feed units is that
[A].

heat sensitive material can be handled.

[B].

there is no additional cost of pumping.

[C].

most concentrated liquid is at highest temperature.

[D].

equal heat transfer co-efficients exist in various effects.

Answer: Option C

Explanation:

No answer description available for this question.

The advantage of backward feed multiple effect evaporators over forward feed units is that Read More »

CHEMICAL ENGINEERING, Heat Transfer

Indirect contact heat exchangers are preferred over direct contact heat exchangers, because

CHEMICAL ENGINEERING, Heat Transfer /
Question: Indirect contact heat exchangers are preferred over direct contact heat exchangers, because
[A].

heat transfer co-efficient are high.

[B].

there is no risk of contamination.

[C].

there is no mist formation.

[D].

cost of equipment is lower.

Answer: Option B

Explanation:

No answer description available for this question.

Indirect contact heat exchangers are preferred over direct contact heat exchangers, because Read More »

CHEMICAL ENGINEERING, Heat Transfer

A measure of the extent to which viscous heating is important relative to the heat flow resulting from the impressed temperature difference is represented by the __________ number.

CHEMICAL ENGINEERING, Heat Transfer /
Question: A measure of the extent to which viscous heating is important relative to the heat flow resulting from the impressed temperature difference is represented by the __________ number.
[A].

Condensation

[B].

Grashoff

[C].

Stantan

[D].

Brinkman

Answer: Option D

Explanation:

No answer description available for this question.

A measure of the extent to which viscous heating is important relative to the heat flow resulting from the impressed temperature difference is represented by the __________ number. Read More »

CHEMICAL ENGINEERING, Heat Transfer

Boiling point elevation for a strong and concentrated solution is found by Duhring’s rule, which states that at the same pressure, the boiling point of a solution is a linear function of the __________ of pure water.

CHEMICAL ENGINEERING, Heat Transfer /
Question: Boiling point elevation for a strong and concentrated solution is found by Duhring’s rule, which states that at the same pressure, the boiling point of a solution is a linear function of the __________ of pure water.
[A].

boiling point

[B].

dynamic viscosity

[C].

kinematic viscosity

[D].

density

Answer: Option A

Explanation:

No answer description available for this question.

Boiling point elevation for a strong and concentrated solution is found by Duhring’s rule, which states that at the same pressure, the boiling point of a solution is a linear function of the __________ of pure water. Read More »

CHEMICAL ENGINEERING, Heat Transfer

Condensing film co-efficient for steam on horizontal tubes ranges from 5000 to 15000 Kcal/hr.m2 .°C. Condensation of vapor is carried out inside the tube in a shell and tube heat exchanger, when the

CHEMICAL ENGINEERING, Heat Transfer /
Question: Condensing film co-efficient for steam on horizontal tubes ranges from 5000 to 15000 Kcal/hr.m2 .°C. Condensation of vapor is carried out inside the tube in a shell and tube heat exchanger, when the
[A].

higher condensing film co-efficient is desired.

[B].

condensate is corrosive in nature.

[C].

lower pressure drop through the exchanger is desired.

[D].

temperature of the incoming vapor is very high.

Answer: Option B

Explanation:

No answer description available for this question.

Condensing film co-efficient for steam on horizontal tubes ranges from 5000 to 15000 Kcal/hr.m2 .°C. Condensation of vapor is carried out inside the tube in a shell and tube heat exchanger, when the Read More »

CHEMICAL ENGINEERING, Heat Transfer