1
Air
Air conditioning Certification practice test
Exam Questions with Correct Verified
Solutions 100% Guaranteed Pass
An thermal expansion valve that is stuck wide open will cause
___________. - ANS ✓a flooded evaporator
A properly functioning condenser should always have ______________
leaving the condenser; - ANS ✓sub-cooled, liquid
Tube within a tube, shell and coil, and shell and tube are all types of: -
ANS ✓water cooled condensers.
What is one of the main reasons that reciprocating compressors are
not 100% efficient? - ANS ✓clearance volume
Where is an open drive compressor most likely to develop a
refrigerant leak? - ANS ✓shaft seal
The automatic expansion valve (AEV) maintains a constant ______ in the
evaporator. - ANS ✓pressure
Short cycling during pump down can be caused by: - ANS ✓a leaking
compressor suction valve
Air conditioning Certification practice test
, 2
Air
What is a crankcase heater used to prevent? - ANS ✓Refrigerant
migration to the compressor crankcase during the off-cycle.
The type of compressor that allows access to the internal components
is the _______. - ANS ✓reciprocating semi-hermetic
What do water cooling towers require? - ANS ✓Periodic de-scaling
When a compressor service valve is in the cracked position, which
port is closed? - ANS ✓None are closed
.
When the service valve is in the cracked position all ports are open
Why must an oil separator be kept warm? - ANS ✓To prevent
refrigerant from condensing in the separator during the off cycle.
Which part of the system stores refrigerant until it is needed in the
evaporator: - ANS ✓the receiver
Which part of the system prevents liquid from entering the
compressor: - ANS ✓the accumulator
A split-system air conditioning unit has: - ANS ✓the compressor and
condenser connected by a refrigeration line set to the metering device and
evaporator
In a sealed system, as the pressure increases: - ANS ✓the temperature
increases
Air conditioning Certification practice test
Air
Air conditioning Certification practice test
Exam Questions with Correct Verified
Solutions 100% Guaranteed Pass
An thermal expansion valve that is stuck wide open will cause
___________. - ANS ✓a flooded evaporator
A properly functioning condenser should always have ______________
leaving the condenser; - ANS ✓sub-cooled, liquid
Tube within a tube, shell and coil, and shell and tube are all types of: -
ANS ✓water cooled condensers.
What is one of the main reasons that reciprocating compressors are
not 100% efficient? - ANS ✓clearance volume
Where is an open drive compressor most likely to develop a
refrigerant leak? - ANS ✓shaft seal
The automatic expansion valve (AEV) maintains a constant ______ in the
evaporator. - ANS ✓pressure
Short cycling during pump down can be caused by: - ANS ✓a leaking
compressor suction valve
Air conditioning Certification practice test
, 2
Air
What is a crankcase heater used to prevent? - ANS ✓Refrigerant
migration to the compressor crankcase during the off-cycle.
The type of compressor that allows access to the internal components
is the _______. - ANS ✓reciprocating semi-hermetic
What do water cooling towers require? - ANS ✓Periodic de-scaling
When a compressor service valve is in the cracked position, which
port is closed? - ANS ✓None are closed
.
When the service valve is in the cracked position all ports are open
Why must an oil separator be kept warm? - ANS ✓To prevent
refrigerant from condensing in the separator during the off cycle.
Which part of the system stores refrigerant until it is needed in the
evaporator: - ANS ✓the receiver
Which part of the system prevents liquid from entering the
compressor: - ANS ✓the accumulator
A split-system air conditioning unit has: - ANS ✓the compressor and
condenser connected by a refrigeration line set to the metering device and
evaporator
In a sealed system, as the pressure increases: - ANS ✓the temperature
increases
Air conditioning Certification practice test
