HVAC EXCELLENCE CERTIFICATION
EXAMINATION PRACTICE 100+ QUESTIONS 2026 –
VERIFIED Q&A WITH RATIONALES FROM
CERTIFIED EXAMINER ACTUAL EXAM PREP 100%
FAST REVISION
TECHNICIAN LEVEL
Time Allowed: 2 Hours
Examining Board: HVAC Excellence Certification Board
Test Content Outline:
1. Safety Practices
2. Tools and Instruments
3. Basic Refrigeration Cycle
4. Electrical Fundamentals
5. Motors and Controls
6. Heating Systems
7. Air Conditioning Systems
8. Refrigerants and Oils
9. Troubleshooting Techniques
10.Codes and Standards
SECTION A:
1. What is the primary purpose of a fuse in an HVAC electrical circuit?
A. Increase voltage
B. Reduce resistance
C. Protect against overcurrent
D. Store electrical energy
Answer: C. Protect against overcurrent
Explanation: A fuse opens the circuit when current exceeds safe levels, preventing
damage to components.
,2. Which tool is used to measure electrical resistance?
A. Voltmeter
B. Ammeter
C. Ohmmeter
D. Manometer
Answer: C. Ohmmeter
Explanation: An ohmmeter measures resistance in ohms within an electrical circuit.
3. In the refrigeration cycle, where does heat absorption occur?
A. Compressor
B. Condenser
C. Expansion valve
D. Evaporator
Answer: D. Evaporator
Explanation: The evaporator absorbs heat from the surrounding air, causing
refrigerant to evaporate.
4. What type of motor is commonly used in HVAC blowers?
A. Stepper motor
B. DC motor
C. Induction motor
D. Servo motor
Answer: C. Induction motor
Explanation: Induction motors are reliable and commonly used for fans and
blowers.
5. Which refrigerant property is most important for heat transfer?
A. Color
B. Density
C. Latent heat
D. Odor
Answer: C. Latent heat
Explanation: Latent heat allows refrigerant to absorb and release large amounts of
energy during phase changes.
6. What is the function of a thermostat?
A. Increase airflow
, B. Regulate temperature
C. Control humidity
D. Measure pressure
Answer: B. Regulate temperature
Explanation: A thermostat controls system operation based on temperature settings.
7. Which component compresses refrigerant vapor?
A. Evaporator
B. Compressor
C. Condenser
D. Receiver
Answer: B. Compressor
Explanation: The compressor increases pressure and temperature of refrigerant
vapor.
8. What does a capacitor do in an HVAC system?
A. Stores electrical energy
B. Reduces airflow
C. Measures voltage
D. Increases resistance
Answer: A. Stores electrical energy
Explanation: Capacitors help start and run motors by storing and releasing energy.
9. Which safety gear protects eyes during HVAC work?
A. Gloves
B. Helmet
C. Safety goggles
D. Boots
Answer: C. Safety goggles
Explanation: Goggles protect eyes from debris, chemicals, and refrigerants.
10. What is superheat?
A. Heat removed from refrigerant
B. Temperature above boiling point
C. Pressure increase
D. Liquid cooling
Answer: B. Temperature above boiling point
EXAMINATION PRACTICE 100+ QUESTIONS 2026 –
VERIFIED Q&A WITH RATIONALES FROM
CERTIFIED EXAMINER ACTUAL EXAM PREP 100%
FAST REVISION
TECHNICIAN LEVEL
Time Allowed: 2 Hours
Examining Board: HVAC Excellence Certification Board
Test Content Outline:
1. Safety Practices
2. Tools and Instruments
3. Basic Refrigeration Cycle
4. Electrical Fundamentals
5. Motors and Controls
6. Heating Systems
7. Air Conditioning Systems
8. Refrigerants and Oils
9. Troubleshooting Techniques
10.Codes and Standards
SECTION A:
1. What is the primary purpose of a fuse in an HVAC electrical circuit?
A. Increase voltage
B. Reduce resistance
C. Protect against overcurrent
D. Store electrical energy
Answer: C. Protect against overcurrent
Explanation: A fuse opens the circuit when current exceeds safe levels, preventing
damage to components.
,2. Which tool is used to measure electrical resistance?
A. Voltmeter
B. Ammeter
C. Ohmmeter
D. Manometer
Answer: C. Ohmmeter
Explanation: An ohmmeter measures resistance in ohms within an electrical circuit.
3. In the refrigeration cycle, where does heat absorption occur?
A. Compressor
B. Condenser
C. Expansion valve
D. Evaporator
Answer: D. Evaporator
Explanation: The evaporator absorbs heat from the surrounding air, causing
refrigerant to evaporate.
4. What type of motor is commonly used in HVAC blowers?
A. Stepper motor
B. DC motor
C. Induction motor
D. Servo motor
Answer: C. Induction motor
Explanation: Induction motors are reliable and commonly used for fans and
blowers.
5. Which refrigerant property is most important for heat transfer?
A. Color
B. Density
C. Latent heat
D. Odor
Answer: C. Latent heat
Explanation: Latent heat allows refrigerant to absorb and release large amounts of
energy during phase changes.
6. What is the function of a thermostat?
A. Increase airflow
, B. Regulate temperature
C. Control humidity
D. Measure pressure
Answer: B. Regulate temperature
Explanation: A thermostat controls system operation based on temperature settings.
7. Which component compresses refrigerant vapor?
A. Evaporator
B. Compressor
C. Condenser
D. Receiver
Answer: B. Compressor
Explanation: The compressor increases pressure and temperature of refrigerant
vapor.
8. What does a capacitor do in an HVAC system?
A. Stores electrical energy
B. Reduces airflow
C. Measures voltage
D. Increases resistance
Answer: A. Stores electrical energy
Explanation: Capacitors help start and run motors by storing and releasing energy.
9. Which safety gear protects eyes during HVAC work?
A. Gloves
B. Helmet
C. Safety goggles
D. Boots
Answer: C. Safety goggles
Explanation: Goggles protect eyes from debris, chemicals, and refrigerants.
10. What is superheat?
A. Heat removed from refrigerant
B. Temperature above boiling point
C. Pressure increase
D. Liquid cooling
Answer: B. Temperature above boiling point
