What is the best thing to do before evacuating a refrigeration system?
a. Open the suction and close the discharge service valves to the refrigeration system.
b. Replace the oil in the vacuum pump to make sure it will pull a good vacuum.
c. Evacuate the gauge and pump connections to ensure all connections are tight.
c. Evacuate the gauge and pump connections to ensure all connections are tight.
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When moisture is present in a refrigeration system, it will react with the refrigerant and the oil to form ____.
A. carbon dioxide B. acid C. carbon monoxide D. carbolic acid
Excessive debris at the bottom of the water garden is of no concern as long as the water is at least 2 feet deep and the debris is organic
Indicate whether the statement is true or false
The amperage draw of an electric fuel pump is higher than specified. All of the following are possible causes EXCEPT ________
A) Defective fuel pump B) Restriction in the fuel line C) Clogged fuel filter D) Corroded electrical connections at the pump motor
What is a gas pilot light?
A) a small flame that is used to light the main burners B) an LED that indicates the burner activity C) a light that allows the technician to see inside the furnace D) the first portion of the main burner that remains on at all times