Automotive Climate Control Systems
Certification Exam Practice Questions
And Correct Answers (Verified Answers)
Plus Rationales 2027 Q&A | Instant
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1. What is the primary function of an automotive climate control
system?
A. To regulate engine coolant temperature only
B. To control passenger-compartment temperature, humidity, and airflow
C. To increase engine compression
D. To regulate transmission fluid pressure
Answer: B. To control passenger-compartment temperature, humidity, and
airflow
Rationale: Automotive climate control systems are designed to provide
comfortable cabin conditions by controlling temperature, airflow
distribution, blower speed, and, in many systems, humidity and air quality.
, 2. Which component removes heat from the passenger compartment
during air-conditioning operation?
A. Heater core
B. Evaporator
C. Condenser
D. Receiver-drier
Answer: B. Evaporator
Rationale: The evaporator absorbs heat from air passing over its fins as
refrigerant changes from a low-pressure liquid-vapor mixture into vapor.
3. What is the primary purpose of the compressor in an automotive air-
conditioning system?
A. To cool engine oil
B. To circulate and compress refrigerant
C. To remove moisture from cabin air
D. To regulate blower speed
Answer: B. To circulate and compress refrigerant
Rationale: The compressor raises refrigerant pressure and temperature
while moving refrigerant through the air-conditioning circuit.
, 4. Which component rejects heat from the refrigerant to the surrounding
atmosphere?
A. Evaporator
B. Expansion valve
C. Condenser
D. Accumulator
Answer: C. Condenser
Rationale: The condenser releases heat from high-pressure refrigerant to
outside air, causing the refrigerant to condense from vapor into liquid.
5. What happens to refrigerant pressure as it passes through a thermal
expansion valve?
A. It increases substantially
B. It remains constant
C. It decreases substantially
D. It becomes equal to engine oil pressure
Answer: C. It decreases substantially
Rationale: The expansion valve meters refrigerant into the evaporator and
creates the pressure drop necessary for the refrigerant to evaporate and
absorb heat.
, 6. Which component is commonly used to remove moisture and
contaminants from refrigerant in a system using a receiver-drier?
A. Condenser
B. Receiver-drier
C. Compressor clutch
D. Heater control valve
Answer: B. Receiver-drier
Rationale: A receiver-drier stores liquid refrigerant and contains desiccant
that absorbs moisture while helping filter contaminants from the
refrigerant circuit.
7. In a system equipped with an accumulator, where is the accumulator
normally located?
A. In the high-pressure liquid line before the condenser
B. In the low-pressure line between the evaporator and compressor
C. Inside the heater core
D. Between the compressor and condenser
Answer: B. In the low-pressure line between the evaporator and
compressor
Certification Exam Practice Questions
And Correct Answers (Verified Answers)
Plus Rationales 2027 Q&A | Instant
Download Pdf
1. What is the primary function of an automotive climate control
system?
A. To regulate engine coolant temperature only
B. To control passenger-compartment temperature, humidity, and airflow
C. To increase engine compression
D. To regulate transmission fluid pressure
Answer: B. To control passenger-compartment temperature, humidity, and
airflow
Rationale: Automotive climate control systems are designed to provide
comfortable cabin conditions by controlling temperature, airflow
distribution, blower speed, and, in many systems, humidity and air quality.
, 2. Which component removes heat from the passenger compartment
during air-conditioning operation?
A. Heater core
B. Evaporator
C. Condenser
D. Receiver-drier
Answer: B. Evaporator
Rationale: The evaporator absorbs heat from air passing over its fins as
refrigerant changes from a low-pressure liquid-vapor mixture into vapor.
3. What is the primary purpose of the compressor in an automotive air-
conditioning system?
A. To cool engine oil
B. To circulate and compress refrigerant
C. To remove moisture from cabin air
D. To regulate blower speed
Answer: B. To circulate and compress refrigerant
Rationale: The compressor raises refrigerant pressure and temperature
while moving refrigerant through the air-conditioning circuit.
, 4. Which component rejects heat from the refrigerant to the surrounding
atmosphere?
A. Evaporator
B. Expansion valve
C. Condenser
D. Accumulator
Answer: C. Condenser
Rationale: The condenser releases heat from high-pressure refrigerant to
outside air, causing the refrigerant to condense from vapor into liquid.
5. What happens to refrigerant pressure as it passes through a thermal
expansion valve?
A. It increases substantially
B. It remains constant
C. It decreases substantially
D. It becomes equal to engine oil pressure
Answer: C. It decreases substantially
Rationale: The expansion valve meters refrigerant into the evaporator and
creates the pressure drop necessary for the refrigerant to evaporate and
absorb heat.
, 6. Which component is commonly used to remove moisture and
contaminants from refrigerant in a system using a receiver-drier?
A. Condenser
B. Receiver-drier
C. Compressor clutch
D. Heater control valve
Answer: B. Receiver-drier
Rationale: A receiver-drier stores liquid refrigerant and contains desiccant
that absorbs moisture while helping filter contaminants from the
refrigerant circuit.
7. In a system equipped with an accumulator, where is the accumulator
normally located?
A. In the high-pressure liquid line before the condenser
B. In the low-pressure line between the evaporator and compressor
C. Inside the heater core
D. Between the compressor and condenser
Answer: B. In the low-pressure line between the evaporator and
compressor
