Air refrigeration operates on_____________________?

Question: In case of liquids and gases, the heat transfer takes place according to
[A].

conduction

[B].

convection

[C].

radiation

[D].

none of these

Answer: Option B

Explanation:

No answer description available for this question.

Question: During sub-cooling, sensible heat from a liquid refrigerant is removed.
[A].

Yes

[B].

No

Answer: Option A

Explanation:

No answer description available for this question.

Question: The boiling point of __________ is -10.5°C.
[A].

ammonia

[B].

R-12

[C].

sulphur dioxide

[D].

carbon dioxide

Answer: Option C

Explanation:

No answer description available for this question.

Question: The by-pass factor for a cooling coil
[A].

increases with increase in velocity of air passing through it

[B].

decreases with increase in velocity of air passing through it

[C].

remains unchanged with increase in velocity of air passing through it

[D].

may increase or decrease with increase in velocity of air passing through it depending upon the condition of air entering

Answer: Option A

Explanation:

No answer description available for this question.

Question: Emissivity of a body will be equal to its absorptivity at all temperatures.
[A].

Yes

[B].

No

Answer: Option B

Explanation:

No answer description available for this question.