261. The refrigerant supplied to a compressor must be
superheated vapour refrigerant
dry saturated liquid refrigerant
a mixture of liquid and vapour refrigerant
none of these
✅ The correct answer is option A.
Heat Transfer, Refrigeration and Air Conditioning MCQs
262. The process of removing moisture from the air, without change in its dry bulb temperature, is called dehumidification.
Correct
Incorrect
✅ The correct answer is option A.
263. The transfer of heat by molecular collision is known as
conduction
convection
radiation
none of these
✅ The correct answer is option A.
264. The humidification process, on the psychrometric chart is shown by
horizontal line
vertical line
inclined line
curved line
✅ The correct answer is option B.
265. The emissive power of a body depends upon its
temperature
physical nature
wave length
all of these
✅ The correct answer is option D.
266. In actual air-conditioning applications for R-12 and R-22, and operating at a condenser temperature of 40° C and an evaporator temperature of 5° C, the heat rejection factor is about
1
1.25
2.15
5.12
✅ The correct answer is option B.
269. The vertical and uniformly spaced lines on a psychrometric chart indicates
dry bulb temperature
wet bulb temperature
dew point temperature
specific humidity
✅ The correct answer is option A.
270. Radiation is the process of heat transfer in which heat flows from a __________ , in a straight line, without affecting the intervening medium.
cold body to hot body
hot body to cold body
smaller body to larger body
larger body to smaller
✅ The correct answer is option B.