Mechanical Engineering - Heat Transfer, Refrigeration and Air Conditioning

26.
During heating and humidification, the final relative humidity of air
is higher than that of the entering air
is lower than that of the entering air
can be lower or higher than that of the entering air
none of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.

27.
The fluids used in electrolux refrigerator are
water and hydrogen
ammonia and hydrogen
ammonia, water and hydrogen
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.

28.
The process of undercooling is generally brought about by
circulating more quantity of cooling water through the condenser
using water colder than the main circulating water
employing a heat exchanger
any one of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.

29.
The refrigerant after condensation process is cooled below the saturation temperature before throttling. Such a process is called
sub-cooling or under-cooling
super-cooling
normal cooling
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.

30.
R-12 has the __________ freezing point.
lowest
highest
Answer: Option
Explanation:
No answer description is available. Let's discuss.