Kansas HVAC Contractor
Examination Questions And Correct
Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant
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1. What is the primary purpose of a residential or commercial HVAC
system?
A. To increase electrical consumption
B. To control indoor temperature, humidity, air movement, and air
quality
C. To eliminate all outdoor air
D. To provide only refrigeration
Answer: B. To control indoor temperature, humidity, air movement,
and air quality
Rationale: HVAC systems are designed to provide thermal comfort and
acceptable indoor environmental conditions. Depending on the system,
they can heat, cool, dehumidify, humidify, ventilate, filter, and
distribute air.
2. Which measurement represents the temperature at which water
freezes under standard atmospheric pressure?
A. 0°F
B. 32°F
C. 50°F
D. 212°F
,Answer: B. 32°F
Rationale: Under standard atmospheric pressure, water freezes at
32°F. This reference point is frequently used in HVAC calculations
involving outdoor design temperatures, coil temperatures, and freeze
protection.
3. Which component is responsible for moving conditioned air
through most forced-air HVAC systems?
A. Compressor
B. Condenser
C. Blower or air handler fan
D. Expansion valve
Answer: C. Blower or air handler fan
Rationale: The blower or fan moves air through the return duct, filter,
heat exchanger or evaporator coil, supply ductwork, and conditioned
spaces. Compressors and expansion devices belong to the refrigeration
circuit rather than the air-distribution system.
4. What is sensible heat?
A. Heat associated with a change in temperature
B. Heat associated only with condensation
C. Heat associated only with evaporation
D. Heat that cannot be measured
Answer: A. Heat associated with a change in temperature
Rationale: Sensible heat changes the temperature of a substance
without changing its phase. Latent heat, by contrast, is associated with
phase changes such as evaporation or condensation.
5. What is latent heat in an air-conditioning application?
,A. Heat that changes air pressure only
B. Heat associated with moisture removal or addition
C. Heat produced by a compressor motor
D. Heat contained only in metal ductwork
Answer: B. Heat associated with moisture removal or addition
Rationale: Latent heat is involved when water changes state. During
cooling and dehumidification, moisture condenses from air on the
evaporator coil, requiring removal of latent heat.
6. Which device removes airborne particles from return air?
A. Filter
B. Compressor
C. Thermostat
D. Condenser fan
Answer: A. Filter
Rationale: Air filters capture particulate matter before air passes
through the equipment and is redistributed. Proper filter selection and
maintenance help protect equipment and improve indoor air quality.
7. What is the purpose of a thermostat?
A. To compress refrigerant
B. To sense and control temperature according to a set point
C. To filter combustion gases
D. To increase refrigerant pressure
Answer: B. To sense and control temperature according to a set
point
Rationale: A thermostat senses space or equipment temperature and
sends control signals to operate heating or cooling equipment. Modern
, thermostats may also control fan operation, humidity, scheduling, and
communicating equipment.
8. Which component rejects heat from refrigerant to the surrounding
environment in a standard vapor-compression system?
A. Evaporator
B. Condenser
C. Accumulator
D. Metering device
Answer: B. Condenser
Rationale: High-pressure refrigerant vapor releases heat in the
condenser and changes into a high-pressure liquid. In an air-cooled
system, a condenser fan moves outdoor air across the condenser coil.
9. Which component absorbs heat from the conditioned space?
A. Evaporator
B. Condenser
C. Receiver
D. Compressor
Answer: A. Evaporator
Rationale: The evaporator operates at a lower pressure and
temperature than the condenser. Refrigerant absorbs heat as it
evaporates inside the evaporator coil.
10. What is the function of the compressor?
A. Reduce refrigerant pressure
B. Increase refrigerant vapor pressure and circulate refrigerant
C. Remove dust from air
D. Control room humidity directly
Examination Questions And Correct
Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant
Download Pdf
1. What is the primary purpose of a residential or commercial HVAC
system?
A. To increase electrical consumption
B. To control indoor temperature, humidity, air movement, and air
quality
C. To eliminate all outdoor air
D. To provide only refrigeration
Answer: B. To control indoor temperature, humidity, air movement,
and air quality
Rationale: HVAC systems are designed to provide thermal comfort and
acceptable indoor environmental conditions. Depending on the system,
they can heat, cool, dehumidify, humidify, ventilate, filter, and
distribute air.
2. Which measurement represents the temperature at which water
freezes under standard atmospheric pressure?
A. 0°F
B. 32°F
C. 50°F
D. 212°F
,Answer: B. 32°F
Rationale: Under standard atmospheric pressure, water freezes at
32°F. This reference point is frequently used in HVAC calculations
involving outdoor design temperatures, coil temperatures, and freeze
protection.
3. Which component is responsible for moving conditioned air
through most forced-air HVAC systems?
A. Compressor
B. Condenser
C. Blower or air handler fan
D. Expansion valve
Answer: C. Blower or air handler fan
Rationale: The blower or fan moves air through the return duct, filter,
heat exchanger or evaporator coil, supply ductwork, and conditioned
spaces. Compressors and expansion devices belong to the refrigeration
circuit rather than the air-distribution system.
4. What is sensible heat?
A. Heat associated with a change in temperature
B. Heat associated only with condensation
C. Heat associated only with evaporation
D. Heat that cannot be measured
Answer: A. Heat associated with a change in temperature
Rationale: Sensible heat changes the temperature of a substance
without changing its phase. Latent heat, by contrast, is associated with
phase changes such as evaporation or condensation.
5. What is latent heat in an air-conditioning application?
,A. Heat that changes air pressure only
B. Heat associated with moisture removal or addition
C. Heat produced by a compressor motor
D. Heat contained only in metal ductwork
Answer: B. Heat associated with moisture removal or addition
Rationale: Latent heat is involved when water changes state. During
cooling and dehumidification, moisture condenses from air on the
evaporator coil, requiring removal of latent heat.
6. Which device removes airborne particles from return air?
A. Filter
B. Compressor
C. Thermostat
D. Condenser fan
Answer: A. Filter
Rationale: Air filters capture particulate matter before air passes
through the equipment and is redistributed. Proper filter selection and
maintenance help protect equipment and improve indoor air quality.
7. What is the purpose of a thermostat?
A. To compress refrigerant
B. To sense and control temperature according to a set point
C. To filter combustion gases
D. To increase refrigerant pressure
Answer: B. To sense and control temperature according to a set
point
Rationale: A thermostat senses space or equipment temperature and
sends control signals to operate heating or cooling equipment. Modern
, thermostats may also control fan operation, humidity, scheduling, and
communicating equipment.
8. Which component rejects heat from refrigerant to the surrounding
environment in a standard vapor-compression system?
A. Evaporator
B. Condenser
C. Accumulator
D. Metering device
Answer: B. Condenser
Rationale: High-pressure refrigerant vapor releases heat in the
condenser and changes into a high-pressure liquid. In an air-cooled
system, a condenser fan moves outdoor air across the condenser coil.
9. Which component absorbs heat from the conditioned space?
A. Evaporator
B. Condenser
C. Receiver
D. Compressor
Answer: A. Evaporator
Rationale: The evaporator operates at a lower pressure and
temperature than the condenser. Refrigerant absorbs heat as it
evaporates inside the evaporator coil.
10. What is the function of the compressor?
A. Reduce refrigerant pressure
B. Increase refrigerant vapor pressure and circulate refrigerant
C. Remove dust from air
D. Control room humidity directly
