Combustion air for gas appliances should be:
A) 10 cu ft of combustion air per 1,000 BTU of firing rate.
B) 14 to 15 cu ft of combustion air per 1,000 BTU of firing rate.
C) 1 cu ft of combustion air for every cubic foot of gas.
D) Recycled by piping the vent gases back into the combustion air intake.
B
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What diagnostic trouble code (DTC) could be set if the thermostat is defective?
A) P0128 B) P0300 C) P0171 D) P0440
________: the cost of capital broadly defined; the price you would have to pay to rent all
Fill in the blank(s) with the appropriate word(s).
____________________ is a measurement of the ease of electron flow through a resistance.
Fill in the blank(s) with the appropriate word(s).
What is the maximum safe amount of refrigerant for a recovery cylinder with a water capacity of 50 lb, holding a refrigerant with a specific gravity of 0.9?
A) 50 lb × 0.8 = 40 lb B) 50 lb C) 50 lb × 0.8 × 0.9 = 36 lb D) 50 lb × 0.9 = 45 lb