ASE A7 Heating & Air Conditioning Exam Questions
and Correct Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant Download Pdf
1.
What is the primary function of the A/C compressor?
A. Cool the condenser
B. Compress refrigerant vapor
C. Store refrigerant
D. Remove moisture
The compressor raises refrigerant pressure and temperature by
compressing vapor.
2.
,Which component removes heat from refrigerant?
A. Evaporator
B. Compressor
C. Condenser
D. Accumulator
The condenser dissipates heat, turning vapor into liquid.
3.
Low refrigerant charge will MOST likely cause:
A. High pressure readings
B. Poor cooling performance
C. Compressor lock-up
D. Electrical failure
Insufficient refrigerant reduces system cooling efficiency.
4.
Which device controls refrigerant flow into the evaporator?
A. Condenser
B. Compressor
,C. Expansion valve/orifice tube
D. Dryer
It meters refrigerant entering the evaporator.
5.
What is the purpose of a receiver-drier?
A. Increase pressure
B. Remove moisture and store liquid refrigerant
C. Cool refrigerant
D. Compress refrigerant
It filters, dries, and stores refrigerant.
6.
Which refrigerant is most commonly used in modern vehicles?
A. R-12
B. R-134a
C. R-22
D. Ammonia
R-134a replaced R-12 in most vehicles.
, 7.
Frost on the evaporator indicates:
A. High pressure
B. Restricted airflow or low refrigerant
C. Compressor failure
D. Electrical short
Restricted airflow or improper charge can cause freezing.
8.
Which component prevents compressor damage from liquid
refrigerant?
A. Condenser
B. Accumulator
C. Evaporator
D. Orifice tube
Accumulator traps liquid refrigerant before it reaches the compressor.
9.
and Correct Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant Download Pdf
1.
What is the primary function of the A/C compressor?
A. Cool the condenser
B. Compress refrigerant vapor
C. Store refrigerant
D. Remove moisture
The compressor raises refrigerant pressure and temperature by
compressing vapor.
2.
,Which component removes heat from refrigerant?
A. Evaporator
B. Compressor
C. Condenser
D. Accumulator
The condenser dissipates heat, turning vapor into liquid.
3.
Low refrigerant charge will MOST likely cause:
A. High pressure readings
B. Poor cooling performance
C. Compressor lock-up
D. Electrical failure
Insufficient refrigerant reduces system cooling efficiency.
4.
Which device controls refrigerant flow into the evaporator?
A. Condenser
B. Compressor
,C. Expansion valve/orifice tube
D. Dryer
It meters refrigerant entering the evaporator.
5.
What is the purpose of a receiver-drier?
A. Increase pressure
B. Remove moisture and store liquid refrigerant
C. Cool refrigerant
D. Compress refrigerant
It filters, dries, and stores refrigerant.
6.
Which refrigerant is most commonly used in modern vehicles?
A. R-12
B. R-134a
C. R-22
D. Ammonia
R-134a replaced R-12 in most vehicles.
, 7.
Frost on the evaporator indicates:
A. High pressure
B. Restricted airflow or low refrigerant
C. Compressor failure
D. Electrical short
Restricted airflow or improper charge can cause freezing.
8.
Which component prevents compressor damage from liquid
refrigerant?
A. Condenser
B. Accumulator
C. Evaporator
D. Orifice tube
Accumulator traps liquid refrigerant before it reaches the compressor.
9.
