Hvac Questions |100 Questions| With Correct Answers.

What is the minimum height above the grade level for mechanically ventilated supply system? {Ans: 3"}Down-pipe support material must not promote: {Ans: Galvanic action}A one (1) ton refrigeration system has the equivalent of ______BTU's. {Ans: 12,000}Any appliance in which the products of combustion at the point of entrance to the flue under normal operating conditions have a temperature of 1,000 degrees is a ______ appliance. {Ans: low}Minimum size of a flue connector shall be ______ inches unless otherwise specified by manufacturer. {Ans: Flue collar over which it serves.}What is the possible cause of a compressor running continuously? {Ans: low on refrigerant}