Mechanical Engineering - Heat Transfer, Refrigeration and Air Conditioning

16.
The operating temperature of a cold storage is - 2° C. The heat leakage from the surrounding is 30 kW for the ambient temperature of 40° C. The actual C.O.P. of refrigeration plant used is one fourth that of ideal plant working between the same temperatures. The power required to drive the plant is
1.86 kW
3.72 kW
7.44 kW
18.6 kW
Answer: Option
Explanation:
No answer description is available. Let's discuss.

17.
In chemical dehumidification process,
dew point temperature decreases
wet bulb temperature decreases
dry bulb temperature increases
all of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.

18.
A one tonne refrigerating machine means that
one tonne is the total mass of machine
one tonne refrigerant is used
one tonne of water can be converted into ice
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
Explanation:
No answer description is available. Let's discuss.

19.
The air cooling system mostly used in transport type aircrafts is
simple air cooling system
simple evaporative air cooling system
boot-strap air cooling system
all of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.

20.
The critical thickness of insulation is the ratio of thermal conductivity of the insulating material (k) to the heat transfer coefficient at the outer surface of the insulation (h0).
True
False
Answer: Option
Explanation:
No answer description is available. Let's discuss.