NATE Gas questions with correct
answers 2026
What-is-the-typical-load-rating-of-the-branch-circuit-over-current-protection-for-a-residential-
gas-furnace?---correct-answers--15-Amp
When-selecting-a-replacement-indoor-blower-motor,-which-criteria-should-be-included?---
correct-answers--Motor-horsepower
What-is-the-primary-purpose-of-an-off-delay-timer-in-a-gas-furnace?---correct-answers--
Remove-residual-hear-and-prevent-nuisance-limit-trips
To-minimize-noise-problems-in-residential-duct-systems,-what-is-the-range-(recommended-to-
maximum)-of-design-air-velocity-in-the-rectangular-main-supply-trunk?---correct-answers--700-
to-900-fpm
What-is-recommended-for-a-pressurization-leak-test-of-fuel-gas-pipe?---correct-answers--
Compressed-air
Induced-draft-blowers-in-direct-vent-condensing-furnaces-pull-combustion-air-from---correct-
answers--outdoors-only
, Combustion-air-is-often-brought-into-a-non-direct-vent-gas-furnace,-located-in-an-interior-
closet-(confined-space).-What-consideration-is-important-to-remember?---correct-answers--
Two-permanent-openings-of-sufficient-size-must-be-used
The-height-limitation-for-a-vertical-combustion-air-intake-on-a-condensing-gas-furnace-is-set-
by---correct-answers--the-furnace-manufacturer
When-working-on-burners-in-a-gas-function---correct-answers--the-individual-burners-must-be-
mounted-in-correct-alignment
A-thermopile-system-usually-generates-its-own-control-circuit-voltage-of---correct-answers--
750-mV
There-are-two-generally-used-methods-for-controlling-temperature-and-humidity-within-
individual-zones-of-a-residence.-One-is-to-use-dampers-to-control-supply-airflow-to-each-
zone.-What-is-the-other-method?---correct-answers--Use-separate-and-independent-systems-
to-condition-the-air-in-each-zone
The-complaint-is-that-there-is-static-electricity-throughout-the-house.-The-home-has-a-bypass-
humidifier.-The-technician-has-checked-the-humidistat-and-verified-that-it-is-set-properly.
What-would-the-technician-check-next?---correct-answers--Check-that-the-humidifier-damper-
is-open
A-line-voltage-fuse-is-sized-to---correct-answers--protect-from-excessive-voltage
14.-With-a-non-direct-vented-furnace-located-in-a-basement,-what-are-the-requirements-for-
the-space-to-qualify-as-an-"unconfined-space"?---correct-answers--At-least-50-ft-of-air-volume-
for-every
1000-Btu/h-capacity-of-ail-combustion-appliances-in-the-space
answers 2026
What-is-the-typical-load-rating-of-the-branch-circuit-over-current-protection-for-a-residential-
gas-furnace?---correct-answers--15-Amp
When-selecting-a-replacement-indoor-blower-motor,-which-criteria-should-be-included?---
correct-answers--Motor-horsepower
What-is-the-primary-purpose-of-an-off-delay-timer-in-a-gas-furnace?---correct-answers--
Remove-residual-hear-and-prevent-nuisance-limit-trips
To-minimize-noise-problems-in-residential-duct-systems,-what-is-the-range-(recommended-to-
maximum)-of-design-air-velocity-in-the-rectangular-main-supply-trunk?---correct-answers--700-
to-900-fpm
What-is-recommended-for-a-pressurization-leak-test-of-fuel-gas-pipe?---correct-answers--
Compressed-air
Induced-draft-blowers-in-direct-vent-condensing-furnaces-pull-combustion-air-from---correct-
answers--outdoors-only
, Combustion-air-is-often-brought-into-a-non-direct-vent-gas-furnace,-located-in-an-interior-
closet-(confined-space).-What-consideration-is-important-to-remember?---correct-answers--
Two-permanent-openings-of-sufficient-size-must-be-used
The-height-limitation-for-a-vertical-combustion-air-intake-on-a-condensing-gas-furnace-is-set-
by---correct-answers--the-furnace-manufacturer
When-working-on-burners-in-a-gas-function---correct-answers--the-individual-burners-must-be-
mounted-in-correct-alignment
A-thermopile-system-usually-generates-its-own-control-circuit-voltage-of---correct-answers--
750-mV
There-are-two-generally-used-methods-for-controlling-temperature-and-humidity-within-
individual-zones-of-a-residence.-One-is-to-use-dampers-to-control-supply-airflow-to-each-
zone.-What-is-the-other-method?---correct-answers--Use-separate-and-independent-systems-
to-condition-the-air-in-each-zone
The-complaint-is-that-there-is-static-electricity-throughout-the-house.-The-home-has-a-bypass-
humidifier.-The-technician-has-checked-the-humidistat-and-verified-that-it-is-set-properly.
What-would-the-technician-check-next?---correct-answers--Check-that-the-humidifier-damper-
is-open
A-line-voltage-fuse-is-sized-to---correct-answers--protect-from-excessive-voltage
14.-With-a-non-direct-vented-furnace-located-in-a-basement,-what-are-the-requirements-for-
the-space-to-qualify-as-an-"unconfined-space"?---correct-answers--At-least-50-ft-of-air-volume-
for-every
1000-Btu/h-capacity-of-ail-combustion-appliances-in-the-space
