When installing a split-system small commercial refrigeration system, the condensing unit normally contains:
A) Enough refrigerant for just the condensing unit alone.
B) Enough refrigerant for the entire system, including a set length of lines.
C) Enough refrigerant for both the condensing unit and the evaporator, but not the refrigerant lines.
D) No refrigerant, just a nitrogen holding charge.
D
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Which step should be performed LAST when diagnosing an engine performance problem?
A) Verify the repair B) Checking for any technical bulletins C) Performing a thorough visual inspection D) Checking for any stored diagnostic trouble codes
Refrigerants release heat:
A) By condensing from a vapor to a liquid. B) By evaporating from a liquid to a vapor. C) By converting refrigerant molecules into heat energy. D) By rearranging their molecular structure to form a new compound.
Why are a hammer and chisel used on a DOT 39 cylinder?
A) To break open the cylinder B) To lessen refrigerant pressure C) To remove the nozzle D) To open the rupture disk when disposing an empty cylinder
Capacitors can be used alone or combined with resistors to form ____________________ networks.
Fill in the blank(s) with the appropriate word(s).