HVAC Apprenticeship Practice Exam with All Correct &
100% Verified Answers| Latest Update| Already
Graded A+
The main purpose of the accumulator is to: ✔Correct Answer-Prevent liquid slugs at the
compressor
Heat that changes the physical state of a substance without effecting a change in its temperature is
known as: ✔Correct Answer-Latent heat
The location of the thermal bulb for the TXV on the evaporator affects: ✔Correct Answer-The
amount of liquid in the evaporator
If the spring is adjusted to increase the superheat, this new setting will: ✔Correct Answer-
Shorten the frost line
The amount of heat required to raise the temperature of 1 lb of water 1°F is: ✔Correct Answer-1
Therm
The low pressure oil safety switch: ✔Correct Answer-Must be reset manually
Suction line oil traps should be installed when the condenser is: ✔Correct Answer-On the third
floor roof and the evaporator is in the basement
The proper location for an oil separator is between the: ✔Correct Answer-compressor and
condenser
On a TXV, the purpose of an external equalizer is to: ✔Correct Answer-Compensate for a pressure
drop across the evaporator coil
The approximate boiling point of R-12 at atmospheric pressure at sea level is: ✔Correct Answer--
21°F
The freezing point of water is ✔Correct Answer-32°F
Crankcase heaters are energized ✔Correct Answer-When the compressor is of
An accumulator can be located between the ✔Correct Answer-Evaporator and compressor
On a central air conditioning system, a frosted suction line at the compressor inlet
indicates ✔Correct Answer-Low back pressure
The normal temperature of the liquid in an air conditioning evaporator is ✔Correct Answer-35 to
40°F
In an A/C unit, dirty air filters will cause ✔Correct Answer-Low suction pressure
100% Verified Answers| Latest Update| Already
Graded A+
The main purpose of the accumulator is to: ✔Correct Answer-Prevent liquid slugs at the
compressor
Heat that changes the physical state of a substance without effecting a change in its temperature is
known as: ✔Correct Answer-Latent heat
The location of the thermal bulb for the TXV on the evaporator affects: ✔Correct Answer-The
amount of liquid in the evaporator
If the spring is adjusted to increase the superheat, this new setting will: ✔Correct Answer-
Shorten the frost line
The amount of heat required to raise the temperature of 1 lb of water 1°F is: ✔Correct Answer-1
Therm
The low pressure oil safety switch: ✔Correct Answer-Must be reset manually
Suction line oil traps should be installed when the condenser is: ✔Correct Answer-On the third
floor roof and the evaporator is in the basement
The proper location for an oil separator is between the: ✔Correct Answer-compressor and
condenser
On a TXV, the purpose of an external equalizer is to: ✔Correct Answer-Compensate for a pressure
drop across the evaporator coil
The approximate boiling point of R-12 at atmospheric pressure at sea level is: ✔Correct Answer--
21°F
The freezing point of water is ✔Correct Answer-32°F
Crankcase heaters are energized ✔Correct Answer-When the compressor is of
An accumulator can be located between the ✔Correct Answer-Evaporator and compressor
On a central air conditioning system, a frosted suction line at the compressor inlet
indicates ✔Correct Answer-Low back pressure
The normal temperature of the liquid in an air conditioning evaporator is ✔Correct Answer-35 to
40°F
In an A/C unit, dirty air filters will cause ✔Correct Answer-Low suction pressure
