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HVAC FUNDAMENTAL FINAL EXAM questions and answers (latest update with verified solutions
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HVAC FUNDAMENTAL FINAL EXAM questions and answers (latest update with verified solutions
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HVAC FUNDAMENTAL FINALEXAM questions and answers
2025-2026(latest update with
verified solutions)
What is the maximum amount of refrigerant that a recovery cylinder
should contain? - answer 80% water capacity by weight
During push-pull liquid recovery, vapor refrigerant is pulled from the
__ - answer recovery cylinder
If the entire refrigerant charge has leaked out of a system, then a __
should be used to pressurize the system to test for leaks - answer
inert gas
Which evacuation method involves charging a system with nitrogen
to absorb moisture? - answer Triple evacuation
When charging a system with refrigerant, the technician should put
the low- and high-side service valves in ______. - answer mid-
position
What is the superheat of a system if the refrigerant temperature in
the suction line is 58 degrees, its pressure in the evaporator is 60
psig, and its temperature in the evaporator is 34 degree F? - answer
24 degrees F
The process of pumping a system's entire refrigerant charge into
the liquid receiver is called a __________. - answer pump-down
, Many recovery cylinders use a(n) ____________ as a safety device to
turn off the recovery machine when the cylinder is 80% full. -
answer liquid level switch
Calculate the tare weight of a cylinder if its total weight is 590 lb
and the weight of refrigerant in the cylinder is 450 lb - answer 104
lb
Subcooling refers to the amount of ____ removed from a refrigerant
after it has condensed. - answer sensible heat
Pressure that is greater than atmospheric pressure is referred to as
_______ pressure. - answer positive
Two-part epoxy resin kits usually include one tube filled with epoxy
and another tube filled with a(n) ______________. - answer hardener
An evaporator that depends on gravity for air circulation is a _______
evaporator. - answer natural-draft
A liquid-cooling evaporator ___________. - answer All of the above
Heat exchangers made from two metal sheets that are welded
together to form a series of passages are ___________ evaporators. -
answer plate
Heat exchangers featuring metal fins of various styles and types
connected to evaporator tubing are ______ evaporators. - answer
fin-and-tube
Surfaces in and along air ducts that direct airflow through the
evaporator and throughout the cabinet are called ______. - answer
baffles
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