ASE A7 Heating & Air Conditioning Exam Prep —
200 Practice Questions with Verified ☑VERIFIED
ANSWERs & Rationales for 2026/2027
Question 1
Technician A says that evacuating an A/C system
will remove air and moisture from the system.
Technician B says that evacuating an A/C system
will remove dirt particles from the system. Who is
right?
A. Technician A only
B. Technician B only
C. Both A and B
D. Neither A nor B
Correct ☑VERIFIED ANSWER: A. Technician A only
Rationale: Evacuating an A/C system removes air
and moisture from the system. The receiver/drier
may contain a filter or strainer to catch and trap
foreign particles and dirt, but this remains in the
,receiver/drier and is not removed during the
evacuation procedure.
Question 2
There is a growling or rumbling noise at the A/C
compressor when the system is off and the engine
is running. The noise stops when the system is
turned on. Technician A says that a bad compressor
bearing could be the cause. Technician B says that
a bad compressor clutch bearing could be the
cause. Who is right?
A. Technician A only
B. Technician B only
C. Both A and B
D. Neither A nor B
Correct ☑VERIFIED ANSWER: B. Technician B only
Rationale: The compressor clutch bearing allows
the rotor/pulley assembly to spin independently of
the compressor shaft when the A/C system is off.
,When the engine is running and the A/C system is
off, the compressor clutch bearing is spinning. When
the A/C system is turned on, the rotor/pulley
assembly and the armature are locked together by
the magnetic action of the compressor clutch coil.
Question 3
Recovering/recycling equipment must have shutoff
valves located within 12 inches (30 cm) of the
hoses' service ends so that:
A. Oil can be added to the refrigerant
B. The unit can be isolated from the refrigerant
source
C. The filter can be changed without disconnecting
the hoses
D. Refrigerant discharge can be kept to a minimum
Correct ☑VERIFIED ANSWER: D. Refrigerant
discharge can be kept to a minimum
, Rationale: According to the Clean Air Act,
recovery/recycling equipment must have shutoff
valves located within 12 inches (30 cm) of the hoses'
service ends so that refrigerant discharge to the
atmosphere can be kept to a minimum.
Question 4
Which component is responsible for increasing the
pressure and temperature of the refrigerant in an
A/C system?
A. Condenser
B. Expansion valve
C. Compressor
D. Receiver-drier
Correct ☑VERIFIED ANSWER: C. Compressor
Rationale: The compressor functions as a pump that
increases the pressure of the refrigerant vapor,
which correspondingly increases its temperature,
allowing it to release heat in the condenser.
200 Practice Questions with Verified ☑VERIFIED
ANSWERs & Rationales for 2026/2027
Question 1
Technician A says that evacuating an A/C system
will remove air and moisture from the system.
Technician B says that evacuating an A/C system
will remove dirt particles from the system. Who is
right?
A. Technician A only
B. Technician B only
C. Both A and B
D. Neither A nor B
Correct ☑VERIFIED ANSWER: A. Technician A only
Rationale: Evacuating an A/C system removes air
and moisture from the system. The receiver/drier
may contain a filter or strainer to catch and trap
foreign particles and dirt, but this remains in the
,receiver/drier and is not removed during the
evacuation procedure.
Question 2
There is a growling or rumbling noise at the A/C
compressor when the system is off and the engine
is running. The noise stops when the system is
turned on. Technician A says that a bad compressor
bearing could be the cause. Technician B says that
a bad compressor clutch bearing could be the
cause. Who is right?
A. Technician A only
B. Technician B only
C. Both A and B
D. Neither A nor B
Correct ☑VERIFIED ANSWER: B. Technician B only
Rationale: The compressor clutch bearing allows
the rotor/pulley assembly to spin independently of
the compressor shaft when the A/C system is off.
,When the engine is running and the A/C system is
off, the compressor clutch bearing is spinning. When
the A/C system is turned on, the rotor/pulley
assembly and the armature are locked together by
the magnetic action of the compressor clutch coil.
Question 3
Recovering/recycling equipment must have shutoff
valves located within 12 inches (30 cm) of the
hoses' service ends so that:
A. Oil can be added to the refrigerant
B. The unit can be isolated from the refrigerant
source
C. The filter can be changed without disconnecting
the hoses
D. Refrigerant discharge can be kept to a minimum
Correct ☑VERIFIED ANSWER: D. Refrigerant
discharge can be kept to a minimum
, Rationale: According to the Clean Air Act,
recovery/recycling equipment must have shutoff
valves located within 12 inches (30 cm) of the hoses'
service ends so that refrigerant discharge to the
atmosphere can be kept to a minimum.
Question 4
Which component is responsible for increasing the
pressure and temperature of the refrigerant in an
A/C system?
A. Condenser
B. Expansion valve
C. Compressor
D. Receiver-drier
Correct ☑VERIFIED ANSWER: C. Compressor
Rationale: The compressor functions as a pump that
increases the pressure of the refrigerant vapor,
which correspondingly increases its temperature,
allowing it to release heat in the condenser.
