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NATE Gas Exam Questions and Answers – practice questions with answers

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This document contains NATE Gas Exam questions with corresponding answers for study and certification preparation. It covers gas heating systems, furnace components, operation, troubleshooting, safety procedures, and essential HVAC concepts relevant to the NATE examination.

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NATE




NATE GAS EXAM QUESTIONS AND ANSWERS



What is the typical load rating of the branch circuit over-
current protection for a residential gas furnace? - correct
answer 15 Amp




When selecting a replacement indoor blower motor,
which criteria should be included? - correct answer Motor
horsepower


What is the primary purpose of an off-delay timer in a gas
furnace? - correct answer Remove residual hear and prevent
nuisance limit trips

, NATE



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
answer 700 to 900 fpm




What is recommended for a pressurization leak test of
fuel gas pipe? - correct answer Compressed air


Induced draft blowers in direct vent condensing furnaces
pull combustion air from - correct answer 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
answer 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 answer the
furnace manufacturer

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