Mechanical Engineering - Heat Transfer, Refrigeration and Air Conditioning

41.
The heat is transferred by conduction, convection and radiation in
melting of ice
boiler furnaces
condensation of steam in condenser
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.

42.
A thermostatic expansion valve in a refrigeration system
ensures the evaporator completely filled with refrigerant of the load
is suitable only for constant load systems
maintains different temperatures in evaporator in proportion to load
none of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.

43.
The temperature rise, between the condenser outlet and expansion valve in ammonia vapour compression system, should be as low as possible.
Yes
No
Answer: Option
Explanation:
No answer description is available. Let's discuss.

44.
The ratio of the actual mass of water vapour in a unit mass of dry air to the mass of water vapour in the same mass of dry air when it is saturated at the same temperature and pressure, is called
humidity ratio
relative humidity
absolute humidity
degree of saturation
Answer: Option
Explanation:
No answer description is available. Let's discuss.

45.
For unsaturated air, the dew point temperature is __________ wet bulb temperature.
equal to
less than
more than
Answer: Option
Explanation:
No answer description is available. Let's discuss.