NATE CORE SERVICE CERTIFICATION
EXAM QUESTION AND CORRECT
ANSWERS(VERIFIED ANSWERS) PLUS
RATIONALES 2026 Q&A INSTANT
DOWNLOAD PDF
1. Which organization administers the NATE certification program?
A. EPA
B. OSHA
C. North American Technician Excellence (NATE)
D. ACCA
Answer: C
Rationale: NATE stands for North American Technician Excellence and is
the certifying body.
2. What is the primary purpose of the NATE Core exam?
A. To test specialty system knowledge only
B. To test fundamental HVAC knowledge common to all technicians
C. To replace EPA certification
D. To test only electrical skills
Answer: B
Rationale: The Core exam covers general HVAC fundamentals required for
all specialties.
3. Which safety organization sets workplace safety standards in the U.S.?
A. EPA
B. OSHA
C. NATE
D. ASHRAE
, Answer: B
Rationale: OSHA establishes and enforces workplace safety regulations.
4. What type of fire extinguisher is used for electrical fires?
A. Class A
B. Class B
C. Class C
D. Class D
Answer: C
Rationale: Class C extinguishers are designed for energized electrical fires.
5. What personal protective equipment protects eyes from debris?
A. Gloves
B. Hard hat
C. Safety glasses
D. Ear plugs
Answer: C
Rationale: Safety glasses shield eyes from flying particles and debris.
6. Which voltage is most commonly found in residential HVAC systems?
A. 24 volts only
B. 120/240 volts
C. 480 volts
D. 600 volts
Answer: B
Rationale: Residential systems commonly use 120V or 240V power.
7. What instrument measures electrical resistance?
A. Ammeter
B. Voltmeter
C. Ohmmeter
D. Wattmeter
Answer: C
Rationale: Resistance is measured in ohms using an ohmmeter.
8. What does a capacitor do in an HVAC system?
A. Reduces voltage
B. Stores and releases electrical energy
, C. Converts AC to DC
D. Measures current
Answer: B
Rationale: Capacitors store electrical energy to help motors start and run.
9. What is the function of a transformer?
A. Increase current only
B. Change voltage levels
C. Convert AC to DC
D. Control temperature
Answer: B
Rationale: Transformers step voltage up or down as needed.
10.Which color wire is typically used for grounding?
A. Black
B. Red
C. White
D. Green
Answer: D
Rationale: Green or bare wires are used for grounding.
11.What law states that voltage equals current times resistance?
A. Faraday’s Law
B. Watt’s Law
C. Ohm’s Law
D. Newton’s Law
Answer: C
Rationale: Ohm’s Law defines the relationship between voltage, current,
and resistance.
12.What unit is used to measure electrical current?
A. Volts
B. Ohms
C. Amps
D. Watts
Answer: C
Rationale: Electrical current is measured in amperes (amps).
EXAM QUESTION AND CORRECT
ANSWERS(VERIFIED ANSWERS) PLUS
RATIONALES 2026 Q&A INSTANT
DOWNLOAD PDF
1. Which organization administers the NATE certification program?
A. EPA
B. OSHA
C. North American Technician Excellence (NATE)
D. ACCA
Answer: C
Rationale: NATE stands for North American Technician Excellence and is
the certifying body.
2. What is the primary purpose of the NATE Core exam?
A. To test specialty system knowledge only
B. To test fundamental HVAC knowledge common to all technicians
C. To replace EPA certification
D. To test only electrical skills
Answer: B
Rationale: The Core exam covers general HVAC fundamentals required for
all specialties.
3. Which safety organization sets workplace safety standards in the U.S.?
A. EPA
B. OSHA
C. NATE
D. ASHRAE
, Answer: B
Rationale: OSHA establishes and enforces workplace safety regulations.
4. What type of fire extinguisher is used for electrical fires?
A. Class A
B. Class B
C. Class C
D. Class D
Answer: C
Rationale: Class C extinguishers are designed for energized electrical fires.
5. What personal protective equipment protects eyes from debris?
A. Gloves
B. Hard hat
C. Safety glasses
D. Ear plugs
Answer: C
Rationale: Safety glasses shield eyes from flying particles and debris.
6. Which voltage is most commonly found in residential HVAC systems?
A. 24 volts only
B. 120/240 volts
C. 480 volts
D. 600 volts
Answer: B
Rationale: Residential systems commonly use 120V or 240V power.
7. What instrument measures electrical resistance?
A. Ammeter
B. Voltmeter
C. Ohmmeter
D. Wattmeter
Answer: C
Rationale: Resistance is measured in ohms using an ohmmeter.
8. What does a capacitor do in an HVAC system?
A. Reduces voltage
B. Stores and releases electrical energy
, C. Converts AC to DC
D. Measures current
Answer: B
Rationale: Capacitors store electrical energy to help motors start and run.
9. What is the function of a transformer?
A. Increase current only
B. Change voltage levels
C. Convert AC to DC
D. Control temperature
Answer: B
Rationale: Transformers step voltage up or down as needed.
10.Which color wire is typically used for grounding?
A. Black
B. Red
C. White
D. Green
Answer: D
Rationale: Green or bare wires are used for grounding.
11.What law states that voltage equals current times resistance?
A. Faraday’s Law
B. Watt’s Law
C. Ohm’s Law
D. Newton’s Law
Answer: C
Rationale: Ohm’s Law defines the relationship between voltage, current,
and resistance.
12.What unit is used to measure electrical current?
A. Volts
B. Ohms
C. Amps
D. Watts
Answer: C
Rationale: Electrical current is measured in amperes (amps).
