1|Page
NATE CORE EXAM ACTUAL STUDY GUIDE
VERIFIED QUESTIONS & 100% ACCURATE
ANSWERS | COMPLETELY UPDATED 2025–2026
EDITION A+ PERFORMANCE GUARANTEED
The material that is used over roof beams or rafters as a base for the roofing is
called:
A. flashing
B. sheathing
C. fascia
D. baseboard - ANSWER: B. Sheathing
If one end of a copper tube is heating, the other end will soon become very hot
also. The heat moves from one end to the other by:
A. conduction
B. convection
C. air movement within the tube
D. wave energy - ANSWER: A. conduction
Before beginning any electrical checkout procedure, what steps must always be
taken after the equipment disconnect or circuit breaker has been turned off?
A. Ensure you are always properly grounded
B. Check for the presence of voltage
,2|Page
C. Check resistance to ground
D. Replace the defective equipment - ANSWER: B. Check the presence of voltage
To properly test the accuracy of a thermometer, it should be immersed in:
A. a thermometer well
B. a saltwater and ice bath
C. a water and ice bath
D. water with a second thermometer - ANSWER: C. a water and ice bath
When measuring temperature rise, why is it important to factor in radiant heat?
A. it increases the value
B. it increases the latent change
C. it decreases the value
D. it decreases the latent change - ANSWER: A. It increases the value
When making a flare, the height of the tubing above the flaring block is critical
because a flare with too much starting height will:
A. loosen over time
B. slip through the flare nut
C. not fit in the flare nut
D. leak over time - ANSWER: C. not fit into the flare nut
, 3|Page
To change the direction of rotation of a fan driven by a three-phase induction
motor, it is necessary to reverse:
A. run and start connections
B. the connections of any two motor leads
C. the brush leads
D. the capacitor connections - ANSWER: B. the connections of any two motor
leads
Which meter setting should a technician use to determine whether or not a set of
contacts are open in an energized circuit?
A. watts
B. Ohms
C. Volts
D. Amperes - ANSWER: C. Volts
What is a Ground Fault Circuit Interrupter (GFCI) receptacle?
A. a receptacle that shuts all voltage off to its terminals when a plug is removed
B. a circuit breaker that is used to protect auxiliary heating elements during a
blower shutdown
C. an electrical receptacle with a built in 15 or 20 amp auto reset circuit breaker
D. a receptacle that is used to protect against electrical shocks from appliances and
extension cords - ANSWER: D. a receptacle that is used to protect against
electrical shocks from appliances and extension cords
NATE CORE EXAM ACTUAL STUDY GUIDE
VERIFIED QUESTIONS & 100% ACCURATE
ANSWERS | COMPLETELY UPDATED 2025–2026
EDITION A+ PERFORMANCE GUARANTEED
The material that is used over roof beams or rafters as a base for the roofing is
called:
A. flashing
B. sheathing
C. fascia
D. baseboard - ANSWER: B. Sheathing
If one end of a copper tube is heating, the other end will soon become very hot
also. The heat moves from one end to the other by:
A. conduction
B. convection
C. air movement within the tube
D. wave energy - ANSWER: A. conduction
Before beginning any electrical checkout procedure, what steps must always be
taken after the equipment disconnect or circuit breaker has been turned off?
A. Ensure you are always properly grounded
B. Check for the presence of voltage
,2|Page
C. Check resistance to ground
D. Replace the defective equipment - ANSWER: B. Check the presence of voltage
To properly test the accuracy of a thermometer, it should be immersed in:
A. a thermometer well
B. a saltwater and ice bath
C. a water and ice bath
D. water with a second thermometer - ANSWER: C. a water and ice bath
When measuring temperature rise, why is it important to factor in radiant heat?
A. it increases the value
B. it increases the latent change
C. it decreases the value
D. it decreases the latent change - ANSWER: A. It increases the value
When making a flare, the height of the tubing above the flaring block is critical
because a flare with too much starting height will:
A. loosen over time
B. slip through the flare nut
C. not fit in the flare nut
D. leak over time - ANSWER: C. not fit into the flare nut
, 3|Page
To change the direction of rotation of a fan driven by a three-phase induction
motor, it is necessary to reverse:
A. run and start connections
B. the connections of any two motor leads
C. the brush leads
D. the capacitor connections - ANSWER: B. the connections of any two motor
leads
Which meter setting should a technician use to determine whether or not a set of
contacts are open in an energized circuit?
A. watts
B. Ohms
C. Volts
D. Amperes - ANSWER: C. Volts
What is a Ground Fault Circuit Interrupter (GFCI) receptacle?
A. a receptacle that shuts all voltage off to its terminals when a plug is removed
B. a circuit breaker that is used to protect auxiliary heating elements during a
blower shutdown
C. an electrical receptacle with a built in 15 or 20 amp auto reset circuit breaker
D. a receptacle that is used to protect against electrical shocks from appliances and
extension cords - ANSWER: D. a receptacle that is used to protect against
electrical shocks from appliances and extension cords
