The refrigerant for a refrigerator should have ___________________?

Question: The C.O.P. of an absorption type refrigerator is given by (where T1 = Temperature at which the working substance receives heat, T2 = Temperature of cooling water, and T3 = Evaporator temperature)
[A].

[B].

[C].

[D].

Answer: Option B

Explanation:

No answer description available for this question.

Question: At 100% relative humidity, wet bulb temperature, dry bulb temperature, dew point temperature and saturation temperature are equal.
[A].

Correct

[B].

Incorrect

Answer: Option A

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.

Question: A refrigerating system operating on reversed Brayton refrigeration cycle is used for maintaining 250 K. If the temperature at the end of constant pressure cooling is 300 K and rise in the temperature of air in the refrigerator is 50 K, then the net work of compression will be (assume air as working substance with cp = 1 kJ/kg)
[A].

25 kJ/kg

[B].

50 kJ/kg

[C].

l00 kJ/kg

[D].

125 kJ/kg

Answer: Option B

Explanation:

No answer description available for this question.

Question: Which of the following refrigerant has the lowest boiling point?
[A].

Ammonia

[B].

Carbon dioxide

[C].

Sulphur dioxide

[D].

R-12

Answer: Option B

Explanation:

No answer description available for this question.