ASE A7 Heating & Air Conditioning
Practice Exam Questions And Correct
Answers (Verified Answers) Plus
Rationales 2026 Q&A Instant Download
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1. What is the primary function of the compressor in an A/C system?
A. Remove heat from cabin
B. Increase refrigerant pressure and temperature
C. Convert liquid refrigerant to gas
D. Store refrigerant
Answer: B
Rationale: The compressor pressurizes and heats the refrigerant, enabling
heat transfer in the system.
2. Which component removes moisture from the refrigerant?
A. Evaporator
B. Condenser
C. Receiver-drier
D. Expansion valve
Answer: C
Rationale: The receiver-drier contains desiccant that absorbs moisture
from refrigerant.
,3. What happens to refrigerant in the condenser?
A. It evaporates
B. It absorbs heat
C. It condenses into liquid
D. It freezes
Answer: C
Rationale: The condenser releases heat and converts refrigerant vapor
into liquid.
4. A clogged cabin air filter can cause:
A. High refrigerant pressure
B. Poor airflow
C. Compressor damage
D. Low refrigerant level
Answer: B
Rationale: A clogged filter restricts airflow into the cabin.
5. The expansion valve controls:
A. Airflow
B. Refrigerant pressure and flow
C. Compressor speed
D. Cabin temperature directly
Answer: B
Rationale: It regulates refrigerant entering the evaporator.
6. Low refrigerant level will cause:
A. High system pressure
B. Reduced cooling
C. Increased airflow
D. Loud blower motor
Answer: B
Rationale: Insufficient refrigerant reduces cooling efficiency.
7. The evaporator is located:
A. Engine bay
, B. Inside dashboard
C. Near radiator
D. In trunk
Answer: B
Rationale: It is usually inside the HVAC case under the dashboard.
8. What indicates a blocked condenser?
A. Low high-side pressure
B. High high-side pressure
C. Low blower speed
D. Low compressor noise
Answer: B
Rationale: Blockage prevents heat rejection, raising pressure.
9. R-134a refrigerant replaced:
A. R-22
B. R-12
C. R-410a
D. R-1234yf
Answer: B
Rationale: R-134a replaced R-12 due to environmental concerns.
10.A faulty blower motor will affect:
A. Refrigerant pressure
B. Airflow in cabin
C. Compressor lubrication
D. Condenser temperature
Answer: B
Rationale: The blower motor circulates air inside the cabin.
11.What is the purpose of PAG oil?
A. Clean air
B. Lubricate compressor
C. Cool condenser
D. Remove moisture
Practice Exam Questions And Correct
Answers (Verified Answers) Plus
Rationales 2026 Q&A Instant Download
1. What is the primary function of the compressor in an A/C system?
A. Remove heat from cabin
B. Increase refrigerant pressure and temperature
C. Convert liquid refrigerant to gas
D. Store refrigerant
Answer: B
Rationale: The compressor pressurizes and heats the refrigerant, enabling
heat transfer in the system.
2. Which component removes moisture from the refrigerant?
A. Evaporator
B. Condenser
C. Receiver-drier
D. Expansion valve
Answer: C
Rationale: The receiver-drier contains desiccant that absorbs moisture
from refrigerant.
,3. What happens to refrigerant in the condenser?
A. It evaporates
B. It absorbs heat
C. It condenses into liquid
D. It freezes
Answer: C
Rationale: The condenser releases heat and converts refrigerant vapor
into liquid.
4. A clogged cabin air filter can cause:
A. High refrigerant pressure
B. Poor airflow
C. Compressor damage
D. Low refrigerant level
Answer: B
Rationale: A clogged filter restricts airflow into the cabin.
5. The expansion valve controls:
A. Airflow
B. Refrigerant pressure and flow
C. Compressor speed
D. Cabin temperature directly
Answer: B
Rationale: It regulates refrigerant entering the evaporator.
6. Low refrigerant level will cause:
A. High system pressure
B. Reduced cooling
C. Increased airflow
D. Loud blower motor
Answer: B
Rationale: Insufficient refrigerant reduces cooling efficiency.
7. The evaporator is located:
A. Engine bay
, B. Inside dashboard
C. Near radiator
D. In trunk
Answer: B
Rationale: It is usually inside the HVAC case under the dashboard.
8. What indicates a blocked condenser?
A. Low high-side pressure
B. High high-side pressure
C. Low blower speed
D. Low compressor noise
Answer: B
Rationale: Blockage prevents heat rejection, raising pressure.
9. R-134a refrigerant replaced:
A. R-22
B. R-12
C. R-410a
D. R-1234yf
Answer: B
Rationale: R-134a replaced R-12 due to environmental concerns.
10.A faulty blower motor will affect:
A. Refrigerant pressure
B. Airflow in cabin
C. Compressor lubrication
D. Condenser temperature
Answer: B
Rationale: The blower motor circulates air inside the cabin.
11.What is the purpose of PAG oil?
A. Clean air
B. Lubricate compressor
C. Cool condenser
D. Remove moisture
