Maryland HVACR Journeyman Exam With
Actual Questions & Correct Answers, Plus
Rationales/Expert Verified For Guaranteed
Pass 2026/Latest Update/Instant Download
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1. What is the primary purpose of refrigerant in an HVACR system?
A. Increase electrical efficiency
B. Transfer heat
C. Lubricate compressor
D. Filter air
Answer: B
Rationale: Refrigerant absorbs heat in the evaporator and
releases it in the condenser, enabling heat transfer.
2. Which component changes low-pressure liquid refrigerant into a
high-pressure gas?
A. Expansion valve
B. Evaporator
C. Compressor
D. Receiver
Answer: C
Rationale: The compressor raises refrigerant pressure and
temperature, converting it into a high-pressure gas.
,3. What is the function of an expansion valve?
A. Compress refrigerant
B. Control refrigerant flow and pressure drop
C. Remove moisture from air
D. Store refrigerant
Answer: B
Rationale: The expansion valve meters refrigerant and reduces
its pressure before entering the evaporator.
4. Which refrigerant safety classification indicates higher toxicity and
flammability?
A. A1
B. B1
C. A3
D. A2L
Answer: C
Rationale: A3 refrigerants are highly flammable and low toxicity.
5. What tool is used to measure superheat?
A. Manifold gauge
B. Thermometer and pressure chart
C. Psychrometer
D. Ohmmeter
Answer: B
Rationale: Superheat is determined using suction line
temperature and pressure converted via PT chart.
,6. What does subcooling indicate?
A. Refrigerant is fully evaporated
B. Liquid refrigerant is below saturation temperature
C. Airflow restriction
D. Compressor failure
Answer: B
Rationale: Subcooling measures how much a liquid refrigerant is
cooled below its condensing temperature.
7. Which refrigerant state leaves the evaporator?
A. High-pressure liquid
B. Low-pressure liquid
C. Low-pressure vapor
D. High-pressure vapor
Answer: C
Rationale: Refrigerant exits the evaporator as a low-pressure
vapor after absorbing heat.
8. What is the purpose of a thermostat in HVAC systems?
A. Measure humidity
B. Control temperature by switching system operation
C. Increase refrigerant pressure
D. Filter refrigerant
Answer: B
Rationale: A thermostat regulates system operation based on
temperature settings.
, 9. Which type of heat transfer occurs through direct contact?
A. Radiation
B. Conduction
C. Convection
D. Induction
Answer: B
Rationale: Conduction transfers heat through physical contact
between materials.
10. What is the main purpose of a condenser?
A. Absorb heat from indoor air
B. Reject heat to outdoor air
C. Increase airflow
D. Filter refrigerant
Answer: B
Rationale: The condenser removes heat from refrigerant and
releases it outside.
11. What is the function of a blower motor?
A. Compress refrigerant
B. Circulate air through the system
C. Measure pressure
D. Regulate voltage
Answer: B
Rationale: The blower motor moves conditioned air through
ducts.
Actual Questions & Correct Answers, Plus
Rationales/Expert Verified For Guaranteed
Pass 2026/Latest Update/Instant Download
1. What is the primary purpose of refrigerant in an HVACR system?
A. Increase electrical efficiency
B. Transfer heat
C. Lubricate compressor
D. Filter air
Answer: B
Rationale: Refrigerant absorbs heat in the evaporator and
releases it in the condenser, enabling heat transfer.
2. Which component changes low-pressure liquid refrigerant into a
high-pressure gas?
A. Expansion valve
B. Evaporator
C. Compressor
D. Receiver
Answer: C
Rationale: The compressor raises refrigerant pressure and
temperature, converting it into a high-pressure gas.
,3. What is the function of an expansion valve?
A. Compress refrigerant
B. Control refrigerant flow and pressure drop
C. Remove moisture from air
D. Store refrigerant
Answer: B
Rationale: The expansion valve meters refrigerant and reduces
its pressure before entering the evaporator.
4. Which refrigerant safety classification indicates higher toxicity and
flammability?
A. A1
B. B1
C. A3
D. A2L
Answer: C
Rationale: A3 refrigerants are highly flammable and low toxicity.
5. What tool is used to measure superheat?
A. Manifold gauge
B. Thermometer and pressure chart
C. Psychrometer
D. Ohmmeter
Answer: B
Rationale: Superheat is determined using suction line
temperature and pressure converted via PT chart.
,6. What does subcooling indicate?
A. Refrigerant is fully evaporated
B. Liquid refrigerant is below saturation temperature
C. Airflow restriction
D. Compressor failure
Answer: B
Rationale: Subcooling measures how much a liquid refrigerant is
cooled below its condensing temperature.
7. Which refrigerant state leaves the evaporator?
A. High-pressure liquid
B. Low-pressure liquid
C. Low-pressure vapor
D. High-pressure vapor
Answer: C
Rationale: Refrigerant exits the evaporator as a low-pressure
vapor after absorbing heat.
8. What is the purpose of a thermostat in HVAC systems?
A. Measure humidity
B. Control temperature by switching system operation
C. Increase refrigerant pressure
D. Filter refrigerant
Answer: B
Rationale: A thermostat regulates system operation based on
temperature settings.
, 9. Which type of heat transfer occurs through direct contact?
A. Radiation
B. Conduction
C. Convection
D. Induction
Answer: B
Rationale: Conduction transfers heat through physical contact
between materials.
10. What is the main purpose of a condenser?
A. Absorb heat from indoor air
B. Reject heat to outdoor air
C. Increase airflow
D. Filter refrigerant
Answer: B
Rationale: The condenser removes heat from refrigerant and
releases it outside.
11. What is the function of a blower motor?
A. Compress refrigerant
B. Circulate air through the system
C. Measure pressure
D. Regulate voltage
Answer: B
Rationale: The blower motor moves conditioned air through
ducts.
