Mechanical Engineering - Heat Transfer, Refrigeration and Air Conditioning

6.
Dry bulb temperature is the temperature of air recorded by a thermometer, when
it is not affected by the moisture present in the air
its bulb is surrounded by a wet cloth exposed to the air
the moisture present in it begins to condense
none of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.

7.
In a spray washing system, if the temperature of water is higher than the dry bulb temperature of entering air, then the air is
heated and dehumidified
heated and humidified
cooled and humidified
cooled and dehumidified
Answer: Option
Explanation:
No answer description is available. Let's discuss.

8.
A valve which maintains a constant degree of superheat at the end of the evaporator coil, is called
automatic expansion valve
high side float valve
thermostatic expansion valve
low side float valve
Answer: Option
Explanation:
No answer description is available. Let's discuss.

9.
The atmospheric air at dry bulb temperature of 15°C enters a heating coil maintained at 40°C. The air leaves the heating coil at 25°C. The by-pass factor of the heating coil is
0.376
0.4
0.6
0.67
Answer: Option
Explanation:
No answer description is available. Let's discuss.

10.
An infinite parallel planes with emissivities e1 and e2, the interchange factor for radiation from surface 1 to surface 2 is given by
e1 + e2
e1e2
Answer: Option
Explanation:
No answer description is available. Let's discuss.