Mechanical Engineering - Heat Transfer, Refrigeration and Air Conditioning

36.
The wet bulb temperature at 100% relative humidity is __________ dew point temperature.
same as
lower than
higher than
Answer: Option
Explanation:
No answer description is available. Let's discuss.

37.
The use of heat exchangers is made in
radiators in automobile
condensers and boilers in steam plants
condensers and evaporators in refrigeration and air conditioning units
all of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.

38.
In a heat exchanger with one fluid evaporating or condensing, the surface area required is least in
parallel flow
counter flow
cross flow
all of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.

39.
Which of the following statement is correct?
A grey body is one which absorbs all radiations incident on it.
At thermal equilibrium, the emissivity and absorptivity are same.
The energy absorbed by a body to the total energy falling on it, is called emissivity.
A perfect body is one which is black in colour.
Answer: Option
Explanation:
No answer description is available. Let's discuss.

40.
The horizontal and uniformly spaced lines on a psychrometric chart indicates relative humidity.
Correct
Incorrect
Answer: Option
Explanation:
No answer description is available. Let's discuss.