positive
negative
zero
none of these
✅ The correct answer is option C.
Heat Transfer
According to Newton’s law of cooling, the heat transfer from a hot body to a cold body is
directly proportional to the surface area
directly proportional to the difference of temperatures between the two bodies
either (a) or (b)
both (a) and (b)
✅ The correct answer is option D.
The relative humidity lines on a psychrometric chart are
vertical and uniformly spaced
horizontal and uniformly spaced
horizontal and non-uniformly spaced
curved lines
✅ The correct answer is option D.
When there is an addition of water vapour to the air of enclosed space, a gain in __________ is said to occur.
sensible heat
latent heat
✅ The correct answer is option B.
The condition of refrigerant after passing through the condenser in a vapour compression system is
saturated liquid
wet vapour
dry saturated vapour
superheated vapour
✅ The correct answer is option A.
The desirable property of a refrigerant is
low boiling point
high critical temperature
high latent heat of vaporisation
all of these
✅ The correct answer is option D.
The freezing point of carbon dioxide is equal to boiling point of R-12.
Correct
Incorrect
✅ The correct answer is option B.
Planck’s law holds good for all coloured bodies.
TRUE
FALSE
✅ The correct answer is option A.
The inclined and non-uniformly spaced straight lines on a psychrometric chart indicates wet bulb temperature.
Agree
Disagree
✅ The correct answer is option A.