UNIT 9 REVIEW QUESTIONS AND ANSWERS WITH SOLUTIONS 2025

(4-113-1.9) The two major types of compression refrigeration systems are: Select one: a. High pressure and low pressure b. Indirect and Direct c. Frosting and non-frosting d. commercial and residential - ANSWER b (4-114-1.6) Ammonia, as well as being toxic, is also: Select one: a. A low pressure refrigerant b. Flammable c. Miscible with oil d. Odourless - ANSWER b (4-123-1.1) Ammonia systems are seldom used for air conditioning purposes in large building mainly because ammonia: Select one: a. systems require too much maintenance. b. does not provide sufficient cooling capacity for large installations. c. is too toxic. d. systems require more power than most building systems can provide. - ANSWER c (4-115-1.1) Which of the following is not a component of a closed cycle compression refrigeration system? Select one: a. Condenser b. Absorber c. Co