Refrigeration in aeroplanes usually employs the following refrigerant___________________?

Question: Air refrigerator works on
[A].

reversed Carnot cycle

[B].

Bell Coleman cycle

[C].

both (a) and ib)

[D].

none of these

Answer: Option C

Explanation:

No answer description available for this question.

Question: A one tonne refrigerating machine means that
[A].

one tonne is the total mass of machine

[B].

one tonne refrigerant is used

[C].

one tonne of water can be converted into ice

[D].

one tonne of ice when melts from and at 0° C in 24 hours, the refrigeration effect is equivalent to 210 kJ/min

Answer: Option D

Explanation:

No answer description available for this question.

Question: Which of the following statement is correct for ammonia as a refrigerant?
[A].

It is toxic to mucous membranes.

[B].

it requires large displacement per TR compared to fluoro carbons.

[C].

It reacts with copper and its alloys.

[D].

all of these

Answer: Option D

Explanation:

No answer description available for this question.

Question: Fourier’s law of heat conduction gives the heat flow for
[A].

irregular surfaces

[B].

non-uniform temperature surfaces

[C].

one dimensional cases only

[D].

two dimensional cases only

Answer: Option C

Explanation:

No answer description available for this question.