The total emissivity power is .defined as the total amount of radiation emitted by a black body per unit_______________?

Byadmin January 24, 2019August 16, 2021

The total emissivity power is .defined as the total amount of radiation emitted by a black body per unit_______________?

A. temperature
B. thickness
C. area
D. time
E. area and time

Heat Transfer

In regenerator type heat exchanger, heat transfer takes place by___________________?

In regenerator type heat exchanger, heat transfer takes place by___________________?

A. direct mixing of hot and cold fluids
B. a complete separation between hot and cold fluids
C. flow of hot and cold fluids alternately over a surface
D. generation of heat again and again
E. indirect transfer

Read More In regenerator type heat exchanger, heat transfer takes place by___________________?
CHEMICAL ENGINEERING | Heat Transfer

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

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.

Read More Indirect contact heat exchangers are preferred over direct contact heat exchangers, because
Heat Transfer | Mechanical Engineering | Refrigeration and Air Conditioning

Most thermostatic expansion valves are set for a superheat of

Question: Most thermostatic expansion valves are set for a superheat of
[A].

5°C
[B].
10°C
[C].
15°C
[D].
20°C

Answer: Option A

Explanation:

No answer description available for this question.

Read More Most thermostatic expansion valves are set for a superheat of
Heat Transfer | Mechanical Engineering | Refrigeration and Air Conditioning

In larger industrial and commercial reciprocating compression systems, refrigerent widely used is

Question: In larger industrial and commercial reciprocating compression systems, refrigerent widely used is
[A].

ammonia
[B].
carbon dioxide
[C].
sulphur dioxide
[D].
R-12

Answer: Option A

Explanation:

No answer description available for this question.

Read More In larger industrial and commercial reciprocating compression systems, refrigerent widely used is
Heat Transfer | Mechanical Engineering | Refrigeration and Air Conditioning

A condenser of refrigeration system rejects heat at the rate of 120 kW, while its compressor consumes a power of 30 kW. The coefficient of performance of the system will be

Question: A condenser of refrigeration system rejects heat at the rate of 120 kW, while its compressor consumes a power of 30 kW. The coefficient of performance of the system will be
[A].

1/4
[B].
1/3
[C].
3
[D].
4

Answer: Option D

Explanation:

No answer description available for this question.

Read More A condenser of refrigeration system rejects heat at the rate of 120 kW, while its compressor consumes a power of 30 kW. The coefficient of performance of the system will be
CHEMICAL ENGINEERING | Heat Transfer

Intermittant tube cleaning is possible to be done in case of a __________ evaporator.

Question: Intermittant tube cleaning is possible to be done in case of a __________ evaporator.
[A].

basket type
[B].
horizontal tube
[C].
calendria
[D].
none of these

Answer: Option A

Explanation:

No answer description available for this question.

Read More Intermittant tube cleaning is possible to be done in case of a __________ evaporator.

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