ICE HVACR Technician Certification Exam
(Entry-Level)
Practice Test Questions And Correct Answers
(Verified Answers) Plus Rationales 2026 Q&A |
Instant Download Pdf
NURSE CELESTINE
,1. What is the primary function of a thermostat in an HVAC system?
a) To regulate refrigerant flow
b) To control temperature by cycling the system on and off
c) To measure air velocity
d) To monitor humidity
Rationale: The thermostat senses room temperature and turns the
system on or off to maintain the setpoint.
2. Which of the following components compresses refrigerant vapor?
a) Evaporator
b) Condenser
c) Compressor
d) Metering device
, Rationale: The compressor increases refrigerant pressure and
temperature by compressing the vapor.
3. What happens to the refrigerant in the condenser coil?
a) It changes from vapor to liquid
b) It changes from liquid to vapor
c) It absorbs heat from the air
d) It expands to lower pressure
Rationale: In the condenser, refrigerant releases heat and condenses
into a liquid state.
4. The evaporator coil primarily functions to:
a) Reject heat
b) Absorb heat from indoor air
c) Compress refrigerant
d) Store refrigerant
Rationale: The evaporator coil absorbs heat from the indoor air,
cooling the space.
5. The term “superheat” refers to:
a) Liquid refrigerant cooling below saturation
b) Vapor refrigerant temperature above its saturation point
c) Subcooled liquid refrigerant
d) Air temperature leaving the condenser
Rationale: Superheat is the temperature of vapor refrigerant above
its saturation temperature at a given pressure.
, 6. What type of metering device uses a movable pin to regulate
refrigerant flow?
a) Thermostatic Expansion Valve (TXV)
b) Capillary tube
c) Fixed orifice
d) Float valve
Rationale: A TXV modulates refrigerant flow based on evaporator
temperature and pressure.
7. Which refrigerant is commonly used in residential air conditioning
systems?
a) R-410A
b) R-12
c) R-717
d) R-134a
Rationale: R-410A replaced R-22 in most modern residential systems
due to environmental regulations.
8. The suction line in a refrigeration system carries:
a) High-pressure vapor
b) Low-pressure vapor
c) High-pressure liquid
d) Low-pressure liquid
Rationale: The suction line carries low-pressure vapor from the
evaporator to the compressor.
(Entry-Level)
Practice Test Questions And Correct Answers
(Verified Answers) Plus Rationales 2026 Q&A |
Instant Download Pdf
NURSE CELESTINE
,1. What is the primary function of a thermostat in an HVAC system?
a) To regulate refrigerant flow
b) To control temperature by cycling the system on and off
c) To measure air velocity
d) To monitor humidity
Rationale: The thermostat senses room temperature and turns the
system on or off to maintain the setpoint.
2. Which of the following components compresses refrigerant vapor?
a) Evaporator
b) Condenser
c) Compressor
d) Metering device
, Rationale: The compressor increases refrigerant pressure and
temperature by compressing the vapor.
3. What happens to the refrigerant in the condenser coil?
a) It changes from vapor to liquid
b) It changes from liquid to vapor
c) It absorbs heat from the air
d) It expands to lower pressure
Rationale: In the condenser, refrigerant releases heat and condenses
into a liquid state.
4. The evaporator coil primarily functions to:
a) Reject heat
b) Absorb heat from indoor air
c) Compress refrigerant
d) Store refrigerant
Rationale: The evaporator coil absorbs heat from the indoor air,
cooling the space.
5. The term “superheat” refers to:
a) Liquid refrigerant cooling below saturation
b) Vapor refrigerant temperature above its saturation point
c) Subcooled liquid refrigerant
d) Air temperature leaving the condenser
Rationale: Superheat is the temperature of vapor refrigerant above
its saturation temperature at a given pressure.
, 6. What type of metering device uses a movable pin to regulate
refrigerant flow?
a) Thermostatic Expansion Valve (TXV)
b) Capillary tube
c) Fixed orifice
d) Float valve
Rationale: A TXV modulates refrigerant flow based on evaporator
temperature and pressure.
7. Which refrigerant is commonly used in residential air conditioning
systems?
a) R-410A
b) R-12
c) R-717
d) R-134a
Rationale: R-410A replaced R-22 in most modern residential systems
due to environmental regulations.
8. The suction line in a refrigeration system carries:
a) High-pressure vapor
b) Low-pressure vapor
c) High-pressure liquid
d) Low-pressure liquid
Rationale: The suction line carries low-pressure vapor from the
evaporator to the compressor.
