301. The wet bulb temperature during sensible cooling of air
remains constant
increases
decreases
✅ The correct answer is option C.
Heat Transfer, Refrigeration and Air Conditioning MCQs
302. A Bell Coleman refrigerator working on dense air system as compared to open air system, for the same range of temperature, results in higher coefficient of performance.
Agree
Disagree
✅ The correct answer is option A.
303. In a reversed Brayton cycle, the heat is absorbed by the air during
isentropic compression process
constant pressure cooling process
isentropic expansion process
constant pressure expa
✅ The correct answer is option D.
306. The heat rejection factor (HRF) is given by
1 + C.O.P
1 – C.O.P.
✅ The correct answer is option C.
307. Dew point temperature corresponds to the saturation temperature of vapour at its partial pressure.
TRUE
FALSE
✅ The correct answer is option A.
308. The natural convection air cooled condensers are used in
domestic refrigerators
water coolers
room air conditioners
all of these
✅ The correct answer is option A.
309. The C.O.P. of a heat pump working on a reversed Carnot cycle is
✅ The correct answer is option D.
310. The temperature rise, between the condenser outlet and expansion valve in ammonia vapour compression system, should be as low as possible.
Yes
No
✅ The correct answer is option A.