NATE A/C & HVAC PRACTICE TEST 2026
UPDATED QUESTIONS WITH DETAILED
ANSWERS
●● What is the purpose of the evaporator coil in a residential heating
and cooling system?
A) To filter the air
B) To control the temperature
C) To remove unwanted particles
D) To absorb heat from the air
Answer: D) To absorb heat from the air. Answer: Answer: D) To absorb
heat from the air
Explanation: The evaporator coil absorbs heat from the air inside the
home to keep it cool during the
summer. It is located inside the air handler or attached to the furnace.
●● Which component of the heating and cooling system manages the
temperature inside the home?
A) Gas furnace
B) Air handler
C) Thermostat
D) Condensing unit. Answer: Answer: C) Thermostat
, Explanation: The thermostat is responsible for managing the temperature
inside the home. It is usually
found on an inside wall and allows the owner to control the desired
temperature.
●● What is the purpose of the electrical panel in a heating and cooling
system?
A) To control the electrical current
B) To turn off power for maintenance
C) To heat or cool the air
D) To move air to different rooms. Answer: Answer: A) To control the
electrical current
Explanation: The electrical panel controls the electrical current within
the system. It is located on an
interior wall and allows the technician to turn off power in various
locations of the home for safe
maintenance and service.
●● Which type of wrench has a U-shaped opening to grip the face of a
bolt or nut?
A) Open-ended wrench
B) Adjustable wrench
C) Box-end wrenchD) Ratchet-type box wrench. Answer: Answer: A)
Open-ended wrench
UPDATED QUESTIONS WITH DETAILED
ANSWERS
●● What is the purpose of the evaporator coil in a residential heating
and cooling system?
A) To filter the air
B) To control the temperature
C) To remove unwanted particles
D) To absorb heat from the air
Answer: D) To absorb heat from the air. Answer: Answer: D) To absorb
heat from the air
Explanation: The evaporator coil absorbs heat from the air inside the
home to keep it cool during the
summer. It is located inside the air handler or attached to the furnace.
●● Which component of the heating and cooling system manages the
temperature inside the home?
A) Gas furnace
B) Air handler
C) Thermostat
D) Condensing unit. Answer: Answer: C) Thermostat
, Explanation: The thermostat is responsible for managing the temperature
inside the home. It is usually
found on an inside wall and allows the owner to control the desired
temperature.
●● What is the purpose of the electrical panel in a heating and cooling
system?
A) To control the electrical current
B) To turn off power for maintenance
C) To heat or cool the air
D) To move air to different rooms. Answer: Answer: A) To control the
electrical current
Explanation: The electrical panel controls the electrical current within
the system. It is located on an
interior wall and allows the technician to turn off power in various
locations of the home for safe
maintenance and service.
●● Which type of wrench has a U-shaped opening to grip the face of a
bolt or nut?
A) Open-ended wrench
B) Adjustable wrench
C) Box-end wrenchD) Ratchet-type box wrench. Answer: Answer: A)
Open-ended wrench
