ARIZONA HVAC CONTRACTOR EXAM NEWEST
2025-2026 UPDATE REAL PRACTICE EXAM
QUESTIONS & CORRECT ANSWERS | ALREADY
GRADED A+
Content covered (most tested areas): load calculations,
refrigeration cycle, electrical controls, motors, safety, codes,
duct design, airflow, combustion, heat pumps,
troubleshooting, installation practices, EPA refrigerant
handling, permits and inspections, Arizona climate
considerations, gas furnaces, rooftop units, hydronics basics,
controls and sequence of operation
1. What instrument is used to measure external static pressure in an
air distribution system?
A. Psychrometer
B. Manometer
C. Tachometer
D. Anemometer
Answer: B. Manometer
Measures pressure differences in duct systems to assess airflow
resistance.
2. Superheat is defined as:
A. Temperature below saturation
B. Pressure above ambient
C. Temperature above refrigerant boiling point
D. Latent heat removed
, Answer: C. Temperature above refrigerant boiling point
Indicates vapor is fully boiled off and heated further.
3. A capacitor in a PSC motor primarily:
A. Reduces voltage
B. Increases current draw
C. Creates phase shift
D. Stores mechanical energy
Answer: C. Creates phase shift
Provides starting torque by shifting current between windings.
4. The primary purpose of a TXV is to:
A. Increase head pressure
B. Regulate superheat
C. Control subcooling
D. Reduce airflow
Answer: B. Regulate superheat
Maintains proper evaporator feeding.
5. Which refrigerant has been commonly used in modern residential
systems as an R-22 replacement?
A. R-134a
B. R-404A
C. R-410A
D. R-123
Answer: C. R-410A
High-pressure HFC widely used in residential AC.
6. Heat pumps in heating mode extract heat from:
A. Indoor air
B. Electrical heaters
, C. Outdoor air
D. Ground water only
Answer: C. Outdoor air
Even cold air contains usable heat energy.
7. Excessive airflow across an evaporator coil will result in:
A. Low superheat
B. High superheat
C. Coil icing
D. Compressor slugging
Answer: B. High superheat
Refrigerant evaporates too quickly due to insufficient heat transfer
time.
8. A cracked heat exchanger is dangerous because it can release:
A. Ozone
B. Nitrogen
C. Carbon monoxide
D. Refrigerant vapor
Answer: C. Carbon monoxide
Incomplete combustion produces toxic CO.
9. The minimum clearance around gas furnaces is specified by:
A. Manufacturer instructions
B. Utility company
C. Thermostat type
D. Duct size
Answer: A. Manufacturer instructions
Codes require following listed equipment guidelines.
2025-2026 UPDATE REAL PRACTICE EXAM
QUESTIONS & CORRECT ANSWERS | ALREADY
GRADED A+
Content covered (most tested areas): load calculations,
refrigeration cycle, electrical controls, motors, safety, codes,
duct design, airflow, combustion, heat pumps,
troubleshooting, installation practices, EPA refrigerant
handling, permits and inspections, Arizona climate
considerations, gas furnaces, rooftop units, hydronics basics,
controls and sequence of operation
1. What instrument is used to measure external static pressure in an
air distribution system?
A. Psychrometer
B. Manometer
C. Tachometer
D. Anemometer
Answer: B. Manometer
Measures pressure differences in duct systems to assess airflow
resistance.
2. Superheat is defined as:
A. Temperature below saturation
B. Pressure above ambient
C. Temperature above refrigerant boiling point
D. Latent heat removed
, Answer: C. Temperature above refrigerant boiling point
Indicates vapor is fully boiled off and heated further.
3. A capacitor in a PSC motor primarily:
A. Reduces voltage
B. Increases current draw
C. Creates phase shift
D. Stores mechanical energy
Answer: C. Creates phase shift
Provides starting torque by shifting current between windings.
4. The primary purpose of a TXV is to:
A. Increase head pressure
B. Regulate superheat
C. Control subcooling
D. Reduce airflow
Answer: B. Regulate superheat
Maintains proper evaporator feeding.
5. Which refrigerant has been commonly used in modern residential
systems as an R-22 replacement?
A. R-134a
B. R-404A
C. R-410A
D. R-123
Answer: C. R-410A
High-pressure HFC widely used in residential AC.
6. Heat pumps in heating mode extract heat from:
A. Indoor air
B. Electrical heaters
, C. Outdoor air
D. Ground water only
Answer: C. Outdoor air
Even cold air contains usable heat energy.
7. Excessive airflow across an evaporator coil will result in:
A. Low superheat
B. High superheat
C. Coil icing
D. Compressor slugging
Answer: B. High superheat
Refrigerant evaporates too quickly due to insufficient heat transfer
time.
8. A cracked heat exchanger is dangerous because it can release:
A. Ozone
B. Nitrogen
C. Carbon monoxide
D. Refrigerant vapor
Answer: C. Carbon monoxide
Incomplete combustion produces toxic CO.
9. The minimum clearance around gas furnaces is specified by:
A. Manufacturer instructions
B. Utility company
C. Thermostat type
D. Duct size
Answer: A. Manufacturer instructions
Codes require following listed equipment guidelines.
