1|Page
NATE GAS & HEAT EXAM LATEST 2025/2026 ACTUAL EXAM WITH
COMPLETE QUESTIONS AND CORRECT DETAILED ANSWERS (100%
VERIFIED ANSWERS) |ALREADY GRADED A+| ||PROFESSOR
VERIFIED|| ||BRANDNEW!!!||
When furnaces are installed in attics or crawl spaces, special care
must be taken to ____.
a. distribute the weight properly
b. insulate the ductwork
c. protect water lines from freezing
d. all of the above - ANSWER-d
Which of the following is true of low-voltage control wiring?
a. It is exempt from NEC requirements
b. It may not be run in the same conduit as line-voltage wiring
c. It may not exceed 100 ft in length
d. It must be run in metal conduit - ANSWER-b
What is the maximum pressure that can be supplied to most
natural gas furnaces?
a. 3.5 in. w.g.
,2|Page
b. 14 in. w.g.
c. 2 psi
d. 5 psi - ANSWER-b
The sensor of an electronic leak detector can be affected by
_____, which may cause the instrument to give a false indication
of a gas leak.
a. cutting oil
b. moisture
c. pipe sealant
d. Teflon tape - ANSWER-c
What is the minimum diameter for condensate drain piping?
a. 1/2 in.
b. 3/4 in.
c. 1 in.
d. 1 1/4 in. - ANSWER-b
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Generally speaking, a residential thermostat should be mounted
_____.
a. approximately 5 ft off the floor
b. in the kitchen
c. near a supply register
d. on an exterior wall - ANSWER-a
Which is the proper terminal for heating on most thermostats?
a. C
b. G
c. W
d. Y - ANSWER-c
On an auto changeover thermostat, the difference between the
heating and cooling setpoints (that keeps the equipment from
cycling back and forth between heating and cooling) is known as
the _____.
a. deadband
b. droop
, 4|Page
c. offset
d. throttling range - ANSWER-a
In order to prevent condensation from forming in the heat
exchanger of a furnace, the cooling coil should always be
mounted ______.
a. above the heat exchanger
b. below the heat exchanger
c. downstream from the heat exchanger
d. upstream from the heat exchanger - ANSWER-c
In the summer months, the damper on a bypass humidifier should
be _____.
a. fully closed
b. fully open
c. partially open
d. removed - ANSWER-a
Which of the following is NOT true of a residential zoned system?
NATE GAS & HEAT EXAM LATEST 2025/2026 ACTUAL EXAM WITH
COMPLETE QUESTIONS AND CORRECT DETAILED ANSWERS (100%
VERIFIED ANSWERS) |ALREADY GRADED A+| ||PROFESSOR
VERIFIED|| ||BRANDNEW!!!||
When furnaces are installed in attics or crawl spaces, special care
must be taken to ____.
a. distribute the weight properly
b. insulate the ductwork
c. protect water lines from freezing
d. all of the above - ANSWER-d
Which of the following is true of low-voltage control wiring?
a. It is exempt from NEC requirements
b. It may not be run in the same conduit as line-voltage wiring
c. It may not exceed 100 ft in length
d. It must be run in metal conduit - ANSWER-b
What is the maximum pressure that can be supplied to most
natural gas furnaces?
a. 3.5 in. w.g.
,2|Page
b. 14 in. w.g.
c. 2 psi
d. 5 psi - ANSWER-b
The sensor of an electronic leak detector can be affected by
_____, which may cause the instrument to give a false indication
of a gas leak.
a. cutting oil
b. moisture
c. pipe sealant
d. Teflon tape - ANSWER-c
What is the minimum diameter for condensate drain piping?
a. 1/2 in.
b. 3/4 in.
c. 1 in.
d. 1 1/4 in. - ANSWER-b
,3|Page
Generally speaking, a residential thermostat should be mounted
_____.
a. approximately 5 ft off the floor
b. in the kitchen
c. near a supply register
d. on an exterior wall - ANSWER-a
Which is the proper terminal for heating on most thermostats?
a. C
b. G
c. W
d. Y - ANSWER-c
On an auto changeover thermostat, the difference between the
heating and cooling setpoints (that keeps the equipment from
cycling back and forth between heating and cooling) is known as
the _____.
a. deadband
b. droop
, 4|Page
c. offset
d. throttling range - ANSWER-a
In order to prevent condensation from forming in the heat
exchanger of a furnace, the cooling coil should always be
mounted ______.
a. above the heat exchanger
b. below the heat exchanger
c. downstream from the heat exchanger
d. upstream from the heat exchanger - ANSWER-c
In the summer months, the damper on a bypass humidifier should
be _____.
a. fully closed
b. fully open
c. partially open
d. removed - ANSWER-a
Which of the following is NOT true of a residential zoned system?
