Mechanical Engineering - Heat Transfer, Refrigeration and Air Conditioning

16.
The C.O.P. of a Carnot refrigerator in winter will be __________ as compared to C.O.P. in summer.
same
lower
higher
Answer: Option
Explanation:
No answer description is available. Let's discuss.

17.
Which of the following statement is correct?
The human body can lose heat even if its temperature is less than the atmospheric temperature.
The increase in air movement increases the evaporation from the human body.
The warm air increases the rate of radiation of heat from the human body.
both (a) and (b)
Answer: Option
Explanation:
No answer description is available. Let's discuss.

18.
When the temperature of the surrounding is higher than the temperature of the body, then the heat loss by convection from the body to the surrounding will be
positive
negative
zero
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.

19.
If a gas is to be liquified, its temperature must be
increased to a value above its critical temperature
reduced to a value below its critical temperature
equal to critical temperature
none of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.

20.
The thermostatic expansion valve is used in __________ type of evaporators.
flooded
DX coil
dry
Answer: Option
Explanation:
No answer description is available. Let's discuss.