Introduction (Refrigeration and Air Conditioning)

MCQ No. 1

Which of the following can be called as a refrigeration process?

(A) Cooling of a hot ingot from 1000°C to room temperature
(B) Cooling of a pot of water by mixing it with a large block of ice
(C) Cooling of a hot cup of coffee by leaving it on a table
(D) Cooling of hot water by mixing it with tap water