Wisconsin HVAC Contractor Examination
Questions and Correct Answers (Verified Answers)
Plus Rationale 2027 Q&A| Instant Download Pdf
1. What is the primary purpose of an HVAC system in a conditioned
space?
A. To increase electrical consumption
B. To provide only cooling
C. To control temperature, humidity, air movement, and air quality
D. To eliminate the need for ventilation
Answer: C. To control temperature, humidity, air movement, and air
quality
Rationale: HVAC systems are designed to provide a controlled indoor
environment. Depending on the system, this includes heating, cooling,
ventilation, humidity control, filtration, and air distribution. A complete
HVAC system therefore addresses more than temperature alone.
2. Which Wisconsin agency is responsible for administering HVAC
contractor registration and related trades credentials?
,A. Wisconsin Department of Transportation
B. Wisconsin Department of Safety and Professional Services
C. Wisconsin Department of Revenue
D. Wisconsin Department of Natural Resources
Answer: B. Wisconsin Department of Safety and Professional Services
Rationale: The Wisconsin Department of Safety and Professional
Services (DSPS) administers the state's HVAC contractor registration and
HVAC-related trade credentials. Wisconsin rules identify HVAC
contractor registration under Wis. Admin. Code § SPS 305.70.
3. Under Wisconsin requirements, what generally distinguishes an
HVAC contractor registration from an HVAC qualifier certification?
A. The contractor registration applies to the business, while the
qualifier certification applies to an individual
B. Both credentials apply only to equipment manufacturers
C. The qualifier certification applies only to electrical contractors
D. There is no distinction
Answer: A. The contractor registration applies to the business, while
the qualifier certification applies to an individual
Rationale: Wisconsin treats HVAC contractor registration as a business
credential, while an HVAC qualifier certification is held by an individual.
,A business utilizing an HVAC qualifier may be recognized as a certified
HVAC business under the applicable Wisconsin requirements.
4. What is the basic purpose of a thermostat in a forced-air heating
system?
A. To increase duct pressure
B. To sense space temperature and control system operation
C. To filter return air
D. To regulate refrigerant pressure
Answer: B. To sense space temperature and control system operation
Rationale: A thermostat monitors the temperature of the conditioned
space and signals the heating or cooling equipment when operation is
required. It is part of the control system and does not directly regulate
refrigerant pressure or filter air.
5. What does sensible heat refer to?
A. Heat associated with a change in temperature
B. Heat associated only with condensation
C. Heat stored exclusively in refrigerant
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
a phase change such as evaporation or condensation.
6. Which instrument is commonly used to measure temperature
difference across an HVAC component?
A. Manometer
B. Thermometer or temperature probe
C. Megohmmeter
D. Tachometer
Answer: B. Thermometer or temperature probe
Rationale: Temperature probes or thermometers are used to measure
air, refrigerant, water, and equipment temperatures. Comparing
temperatures before and after a component can help diagnose system
performance.
7. What is the primary function of a furnace heat exchanger?
A. To circulate refrigerant
B. To transfer heat from combustion products to the circulating air
without mixing the two streams
C. To increase return-air humidity
D. To remove dust from outdoor air
Questions and Correct Answers (Verified Answers)
Plus Rationale 2027 Q&A| Instant Download Pdf
1. What is the primary purpose of an HVAC system in a conditioned
space?
A. To increase electrical consumption
B. To provide only cooling
C. To control temperature, humidity, air movement, and air quality
D. To eliminate the need for ventilation
Answer: C. To control temperature, humidity, air movement, and air
quality
Rationale: HVAC systems are designed to provide a controlled indoor
environment. Depending on the system, this includes heating, cooling,
ventilation, humidity control, filtration, and air distribution. A complete
HVAC system therefore addresses more than temperature alone.
2. Which Wisconsin agency is responsible for administering HVAC
contractor registration and related trades credentials?
,A. Wisconsin Department of Transportation
B. Wisconsin Department of Safety and Professional Services
C. Wisconsin Department of Revenue
D. Wisconsin Department of Natural Resources
Answer: B. Wisconsin Department of Safety and Professional Services
Rationale: The Wisconsin Department of Safety and Professional
Services (DSPS) administers the state's HVAC contractor registration and
HVAC-related trade credentials. Wisconsin rules identify HVAC
contractor registration under Wis. Admin. Code § SPS 305.70.
3. Under Wisconsin requirements, what generally distinguishes an
HVAC contractor registration from an HVAC qualifier certification?
A. The contractor registration applies to the business, while the
qualifier certification applies to an individual
B. Both credentials apply only to equipment manufacturers
C. The qualifier certification applies only to electrical contractors
D. There is no distinction
Answer: A. The contractor registration applies to the business, while
the qualifier certification applies to an individual
Rationale: Wisconsin treats HVAC contractor registration as a business
credential, while an HVAC qualifier certification is held by an individual.
,A business utilizing an HVAC qualifier may be recognized as a certified
HVAC business under the applicable Wisconsin requirements.
4. What is the basic purpose of a thermostat in a forced-air heating
system?
A. To increase duct pressure
B. To sense space temperature and control system operation
C. To filter return air
D. To regulate refrigerant pressure
Answer: B. To sense space temperature and control system operation
Rationale: A thermostat monitors the temperature of the conditioned
space and signals the heating or cooling equipment when operation is
required. It is part of the control system and does not directly regulate
refrigerant pressure or filter air.
5. What does sensible heat refer to?
A. Heat associated with a change in temperature
B. Heat associated only with condensation
C. Heat stored exclusively in refrigerant
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
a phase change such as evaporation or condensation.
6. Which instrument is commonly used to measure temperature
difference across an HVAC component?
A. Manometer
B. Thermometer or temperature probe
C. Megohmmeter
D. Tachometer
Answer: B. Thermometer or temperature probe
Rationale: Temperature probes or thermometers are used to measure
air, refrigerant, water, and equipment temperatures. Comparing
temperatures before and after a component can help diagnose system
performance.
7. What is the primary function of a furnace heat exchanger?
A. To circulate refrigerant
B. To transfer heat from combustion products to the circulating air
without mixing the two streams
C. To increase return-air humidity
D. To remove dust from outdoor air
