B.P.F. – 1
1 – B.P.F.
1 + B.P.F.
✅ The correct answer is option B.
Heat Transfer
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
✅ The correct answer is option D.
Wet bulb temperature indicates the moisture content in air.
Agree
Disagree
✅ The correct answer is option A.
The space between the two walls of a thermos flask is evacuated because vacuum is a __________ conductor of heat.
good
bad
✅ The correct answer is option B.
The minimum temperature to which water can be cooled in a cooling tower is
dew point temperature of air
wet bulb temperature of air
dry bulb temperature of air
ambient air temperatur
✅ The correct answer is option B.
In air-conditioning of aeroplanes, using air as a refrigerant, the cycle used is
reversed Carnot cycle
reversed Joule cycle
reversed Brayton cycle
reversed Otto cycle
✅ The correct answer is option C.
The relative coefficient of performance is equal to
Actual C.O.P. x Theoretical C.O.P.
none of these
✅ The correct answer is option B.
The inclined and non-uniformly spaced straight lines on a psychrometric chart indicates wet bulb temperature.
Agree
Disagree
✅ The correct answer is option A.
Planck’s law holds good for all coloured bodies.
TRUE
FALSE
✅ The correct answer is option A.
The freezing point of carbon dioxide is equal to boiling point of R-12.
Correct
Incorrect
✅ The correct answer is option B.