CFESA REFRIGERATION TECHNICIAN CERTIFICATION EXAM NEWEST EVALUATED
EXAM PRACTICE 120 QUESTIONS 2026-2027|ORIGINAL QUESTIONS & ANSWERS
|DETAILED RATIONALES |*HINTED* COMPLETE EXAM PREP GRADED
A+**INSTANT DOWNLOAD PDF**
1. A commercial refrigerator has a high suction pressure, low head pressure,
and a high superheat condition. Which condition is most likely?
A. Overcharge
B. Restricted airflow across condenser
C. Low refrigerant charge
D. Liquid refrigerant returning to compressor
Answer: C. Low refrigerant charge
Low refrigerant charge commonly produces low suction pressure, reduced head
pressure, and high superheat because insufficient refrigerant reaches the
evaporator.
2. What is the primary purpose of the evaporator in a refrigeration system?
A. Reject heat to the atmosphere
B. Absorb heat from the refrigerated space
C. Compress refrigerant vapor
D. Store liquid refrigerant
Answer: B. Absorb heat from the refrigerated space
The evaporator absorbs heat from the product, air, or refrigerated space as
refrigerant changes from liquid to vapor.
3. Which component raises the pressure and temperature of the refrigerant
vapor?
A. Condenser
B. Evaporator
C. Compressor
D. Metering device
,Answer: C. Compressor
The compressor receives low-pressure vapor and compresses it into high-
pressure, high-temperature vapor.
4. What is the primary function of the condenser?
A. Absorb heat from the cabinet
B. Remove heat from the refrigerant and condense it
C. Reduce refrigerant pressure
D. Increase evaporator superheat
Answer: B. Remove heat from the refrigerant and condense it
The condenser rejects heat from the refrigerant to the surrounding medium,
causing the vapor to become liquid.
5. A thermostatic expansion valve is primarily used to:
A. Control compressor oil pressure
B. Maintain condenser pressure
C. Meter refrigerant into the evaporator
D. Increase compressor discharge temperature
Answer: C. Meter refrigerant into the evaporator
The expansion valve regulates refrigerant flow into the evaporator and helps
maintain proper evaporator superheat.
6. What does superheat represent?
A. Temperature of liquid above its condensing temperature
B. Temperature of vapor above its saturation temperature
C. Temperature of condenser air above room temperature
D. Temperature difference between liquid and ambient air
Answer: B. Temperature of vapor above its saturation temperature
Superheat is the number of degrees a vapor has been heated above its saturation
temperature at a given pressure.
, 7. What does subcooling indicate?
A. Vapor temperature below saturation
B. Liquid temperature below its saturation temperature
C. Compressor temperature below ambient
D. Evaporator temperature above saturation
Answer: B. Liquid temperature below its saturation temperature
Subcooling is the amount by which liquid refrigerant temperature is below its
saturation temperature at the measured pressure.
8. Excessive superheat at the evaporator outlet is most commonly associated
with:
A. An overfeeding metering device
B. A starved evaporator
C. Excessive liquid refrigerant entering the compressor
D. A flooded condenser
Answer: B. A starved evaporator
When insufficient refrigerant enters the evaporator, the refrigerant boils off too
early, producing excessive superheat.
9. Which condition can cause excessively high head pressure?
A. Low outdoor temperature
B. Dirty condenser coil
C. Low refrigerant charge
D. Excessive evaporator airflow
Answer: B. Dirty condenser coil
A dirty condenser restricts heat rejection and can cause condensing pressure and
discharge temperature to rise.
10.A condenser fan fails while the compressor continues operating. What is the
most likely immediate result?
, A. Falling head pressure
B. Rising head pressure
C. Falling discharge temperature
D. Increased evaporator capacity
Answer: B. Rising head pressure
Without adequate condenser airflow, heat cannot be rejected effectively, causing
condensing pressure to increase.
11.What is the main purpose of a filter-drier in a refrigeration system?
A. Increase compressor displacement
B. Remove moisture and contaminants
C. Increase evaporator pressure
D. Reduce condenser airflow
Answer: B. Remove moisture and contaminants
The filter-drier helps remove moisture, acids, and particulate contamination from
the refrigerant circuit.
12.Why is moisture particularly harmful in a refrigeration system?
A. It increases cabinet lighting
B. It can freeze at the metering device and contribute to corrosion and acid
formation
C. It increases compressor displacement
D. It eliminates superheat
Answer: B. It can freeze at the metering device and contribute to corrosion and
acid formation
Moisture can freeze at restrictions and can react with refrigerant/oil to form
corrosive compounds.
13.What instrument is normally used to measure refrigerant pressure?
A. Clamp meter
B. Manifold gauge set
EXAM PRACTICE 120 QUESTIONS 2026-2027|ORIGINAL QUESTIONS & ANSWERS
|DETAILED RATIONALES |*HINTED* COMPLETE EXAM PREP GRADED
A+**INSTANT DOWNLOAD PDF**
1. A commercial refrigerator has a high suction pressure, low head pressure,
and a high superheat condition. Which condition is most likely?
A. Overcharge
B. Restricted airflow across condenser
C. Low refrigerant charge
D. Liquid refrigerant returning to compressor
Answer: C. Low refrigerant charge
Low refrigerant charge commonly produces low suction pressure, reduced head
pressure, and high superheat because insufficient refrigerant reaches the
evaporator.
2. What is the primary purpose of the evaporator in a refrigeration system?
A. Reject heat to the atmosphere
B. Absorb heat from the refrigerated space
C. Compress refrigerant vapor
D. Store liquid refrigerant
Answer: B. Absorb heat from the refrigerated space
The evaporator absorbs heat from the product, air, or refrigerated space as
refrigerant changes from liquid to vapor.
3. Which component raises the pressure and temperature of the refrigerant
vapor?
A. Condenser
B. Evaporator
C. Compressor
D. Metering device
,Answer: C. Compressor
The compressor receives low-pressure vapor and compresses it into high-
pressure, high-temperature vapor.
4. What is the primary function of the condenser?
A. Absorb heat from the cabinet
B. Remove heat from the refrigerant and condense it
C. Reduce refrigerant pressure
D. Increase evaporator superheat
Answer: B. Remove heat from the refrigerant and condense it
The condenser rejects heat from the refrigerant to the surrounding medium,
causing the vapor to become liquid.
5. A thermostatic expansion valve is primarily used to:
A. Control compressor oil pressure
B. Maintain condenser pressure
C. Meter refrigerant into the evaporator
D. Increase compressor discharge temperature
Answer: C. Meter refrigerant into the evaporator
The expansion valve regulates refrigerant flow into the evaporator and helps
maintain proper evaporator superheat.
6. What does superheat represent?
A. Temperature of liquid above its condensing temperature
B. Temperature of vapor above its saturation temperature
C. Temperature of condenser air above room temperature
D. Temperature difference between liquid and ambient air
Answer: B. Temperature of vapor above its saturation temperature
Superheat is the number of degrees a vapor has been heated above its saturation
temperature at a given pressure.
, 7. What does subcooling indicate?
A. Vapor temperature below saturation
B. Liquid temperature below its saturation temperature
C. Compressor temperature below ambient
D. Evaporator temperature above saturation
Answer: B. Liquid temperature below its saturation temperature
Subcooling is the amount by which liquid refrigerant temperature is below its
saturation temperature at the measured pressure.
8. Excessive superheat at the evaporator outlet is most commonly associated
with:
A. An overfeeding metering device
B. A starved evaporator
C. Excessive liquid refrigerant entering the compressor
D. A flooded condenser
Answer: B. A starved evaporator
When insufficient refrigerant enters the evaporator, the refrigerant boils off too
early, producing excessive superheat.
9. Which condition can cause excessively high head pressure?
A. Low outdoor temperature
B. Dirty condenser coil
C. Low refrigerant charge
D. Excessive evaporator airflow
Answer: B. Dirty condenser coil
A dirty condenser restricts heat rejection and can cause condensing pressure and
discharge temperature to rise.
10.A condenser fan fails while the compressor continues operating. What is the
most likely immediate result?
, A. Falling head pressure
B. Rising head pressure
C. Falling discharge temperature
D. Increased evaporator capacity
Answer: B. Rising head pressure
Without adequate condenser airflow, heat cannot be rejected effectively, causing
condensing pressure to increase.
11.What is the main purpose of a filter-drier in a refrigeration system?
A. Increase compressor displacement
B. Remove moisture and contaminants
C. Increase evaporator pressure
D. Reduce condenser airflow
Answer: B. Remove moisture and contaminants
The filter-drier helps remove moisture, acids, and particulate contamination from
the refrigerant circuit.
12.Why is moisture particularly harmful in a refrigeration system?
A. It increases cabinet lighting
B. It can freeze at the metering device and contribute to corrosion and acid
formation
C. It increases compressor displacement
D. It eliminates superheat
Answer: B. It can freeze at the metering device and contribute to corrosion and
acid formation
Moisture can freeze at restrictions and can react with refrigerant/oil to form
corrosive compounds.
13.What instrument is normally used to measure refrigerant pressure?
A. Clamp meter
B. Manifold gauge set
