320) Which of the following refrigerant has the lowest boiling point?

321) During sensible cooling of air, the relative humidity increases.

322) In actual air-conditioning applications for R-12 and R-22, and operating at a condenser temperature of 40 Degree Centigrade and an evaporator temperature of 5 Degree Centigrade, the heat rejection factor is about

323) The undesireable property of a refrigerant is

324) The dry bulb temperature during sensible heating of air