Mechanical Engineering - Heat Transfer, Refrigeration and Air Conditioning

26.
The wet bulb depression indicates __________ humidity of the air.
absolute
relative
specific
Answer: Option
Explanation:
No answer description is available. Let's discuss.

27.
The refrigerant widely used in domestic refrigerators is
ammonia
carbon dioxide
sulphur dioxide
R-12
Answer: Option
Explanation:
No answer description is available. Let's discuss.

28.
When absorptivity (α) = 1, reflectivity (ρ) = 0 and transmittivity (τ) = 0, then the body is said to be a
black body
grey body
opaque body
white body
Answer: Option
Explanation:
No answer description is available. Let's discuss.

29.
Prandtl number (PN) is given by PN = μ.cp/k.
Yes
No
Answer: Option
Explanation:
No answer description is available. Let's discuss.

30.
In a vapour compression system, the condition of refrigerant before passing through the condenser is
saturated liquid
wet vapour
dry saturated vapour
superheated vapour
Answer: Option
Explanation:
No answer description is available. Let's discuss.