Page 1 of 149
District of Columbia Journeyman A/C and
Refrigeration (312) Exam Prep 200-
Question Practice Exam with Answers &
Explanations (2026 Edition) PDF
Q1. In the refrigeration cycle, which component is responsible
for compressing the refrigerant?
A) Condenser
B) Compressor
C) Evaporator
D) Expansion Valve
Answer: B
Rationale: The compressor is the heart of the refrigeration
system. It takes in low-pressure, low-temperature refrigerant
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vapor and compresses it to significantly increase both its pressure
and temperature before sending it to the condenser.
Q2. Which process in the refrigeration cycle involves the
refrigerant absorbing heat and changing from a liquid to a
vapor?
A) Compression
B) Condensation
C) Expansion
D) Evaporation
Answer: D
Rationale: During evaporation, the refrigerant absorbs heat
from the conditioned space, boiling and changing from a liquid
to a low-pressure vapor, producing the cooling effect.
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Q3. In a split system air conditioner, which component is
typically installed indoors?
A) Outdoor condenser
B) Indoor evaporator coil
C) Compressor
D) Condenser fan motor
Answer: B
Rationale: In a split system, the evaporator is placed indoors to
absorb heat, while the condenser and compressor are located
outdoors to release heat.
Q4. What is the primary function of the condenser in a
refrigeration system?
A) To increase refrigerant pressure
B) To remove heat and condense the refrigerant into a liquid
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C) To control superheat
D) To allow refrigerant expansion
Answer: B
Rationale: The condenser rejects the heat absorbed from the
conditioned space to the outside air, allowing the hot, high-
pressure refrigerant vapor to condense into a liquid.
Q5. Which component controls the flow of refrigerant into the
evaporator and creates a pressure drop?
A) Compressor
B) Expansion Valve
C) Condenser
D) Receiver
Answer: B
District of Columbia Journeyman A/C and
Refrigeration (312) Exam Prep 200-
Question Practice Exam with Answers &
Explanations (2026 Edition) PDF
Q1. In the refrigeration cycle, which component is responsible
for compressing the refrigerant?
A) Condenser
B) Compressor
C) Evaporator
D) Expansion Valve
Answer: B
Rationale: The compressor is the heart of the refrigeration
system. It takes in low-pressure, low-temperature refrigerant
,Page 2 of 149
vapor and compresses it to significantly increase both its pressure
and temperature before sending it to the condenser.
Q2. Which process in the refrigeration cycle involves the
refrigerant absorbing heat and changing from a liquid to a
vapor?
A) Compression
B) Condensation
C) Expansion
D) Evaporation
Answer: D
Rationale: During evaporation, the refrigerant absorbs heat
from the conditioned space, boiling and changing from a liquid
to a low-pressure vapor, producing the cooling effect.
,Page 3 of 149
Q3. In a split system air conditioner, which component is
typically installed indoors?
A) Outdoor condenser
B) Indoor evaporator coil
C) Compressor
D) Condenser fan motor
Answer: B
Rationale: In a split system, the evaporator is placed indoors to
absorb heat, while the condenser and compressor are located
outdoors to release heat.
Q4. What is the primary function of the condenser in a
refrigeration system?
A) To increase refrigerant pressure
B) To remove heat and condense the refrigerant into a liquid
, Page 4 of 149
C) To control superheat
D) To allow refrigerant expansion
Answer: B
Rationale: The condenser rejects the heat absorbed from the
conditioned space to the outside air, allowing the hot, high-
pressure refrigerant vapor to condense into a liquid.
Q5. Which component controls the flow of refrigerant into the
evaporator and creates a pressure drop?
A) Compressor
B) Expansion Valve
C) Condenser
D) Receiver
Answer: B
