NATEl Gasl l Heatl Examl Latestl 2026l

NATEl Gasl &l Heatl Examl (Latestl 2026/l 2027l Update)l Prep|l 100%l Verifiedl Questionsl &l Answersl |l Gradel A

Q:l Al technicianl measuresl thel returnl airl temperaturel ofl al 100,000l BTUl outputl gasl furnacel tol bel 65l degreesl andl thel supplyl sidel airl temperaturel isl 135l degrees:

Answer:

Thel CFMl wouldl bel 1323

Q:l Al dirtyl orl cloggedl airl filterl inl anl operatingl gasl furnacel canl causel an:

Answer:

Increasel temperaturel rise

Q:l Bentl vanesl onl al directl drivel blowerl wheell inl al gasl furnacel canl causel a:

Answer:

Lossl inl airflow,l excessivel blowerl motorl wear,l andl increasel noise

Q:l Al gasl clothesl dryerl canl interferel withl thel operationl ofl al nearbyl naturall draftl gasl

furnacel withl anl atmosphericl burnerl by:

Answer:

Stealingl combustionl airl preventingl completel fuell burning

Q:l Duringl al preventivel maintenancel checkl ofl al gasl furnace:

Answer: 1 / 3

Ductworkl shouldl alwaysl bel checkedl forl leaksl andl damage

Q:l Whenl performingl al cyclel checkl duringl al preventivel maintenancel call,l thel

technicianl should:

Answer:

First,l checkl withl ownerl forl equipmentl performance Next,l turnl thel unitl offl atl thel thermostatl systeml switch Next,l setl fanl switchl tol ONl andl checkl thatl thel blowerl isl running

Q:l Thel measurementsl requiredl tol calculatel thel CFMl ofl al gasl furnacel are:

Answer:

Enteringl airl temperature Leavingl airl temperature Outdoorl ambientl andl ratedl capacity

Q:l Thel reasonl forl checkingl thel temperaturel risel acrossl thel heatl exchangerl ofl al gasl

furnacel isl to:

Answer:

Comparel temperaturel differentiall tol nameplatel rating

Q:l Thel technicianl isl servicingl al gasl furnacel locatedl inl al basementl andl thel complaintl isl "notl enoughl heat".l Thel followingl conditionsl exist:l Properlyl sizedl furnacel isl operatingl correctly;l Temperaturel risel isl withinl specification;l Filterl isl cleanl andl CFMl froml blowerl isl running.

Answer:

Thel mostl likelyl probleml withl thisl systeml isl thel airl sidel isl leakingl atl onel orl morel supplyl ducts

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Q:l Thel technicianl isl checkingl thel operationl ofl anl inducedl draftl furnacel withl anl atmosphericl burnerl andl al directl ignitionl system.l Onl al calll forl heatl the:l Ventl blowerl comesl on;l Igniterl glows;l Mainl burnerl doesl notl light;

Answer:

Thel nextl checkl wouldl bel thel gasl supplyl and/orl gasl valve

Q:l Thel complaintl isl thatl therel isl staticl electricityl throughoutl thel house.l Thel homel hasl al bypassl humidifier.l Thel technicianl hasl checkedl thel humidistatl andl verifiedl thatl itl isl setl properly.

Answer:

Thel nextl checkl wouldl bel tol seel ifl thel humidifierl damperl isl open.

Q:l Al customerl complainsl thel unitl isl "blowingl coldl air".l Thel technicianl determinesl thatl thel probleml occursl atl thel endl ofl thel heatingl sequence.l Thel furnacel usedl anl electronicl integratedl blowerl control.

Answer:

Thel likelyl probleml withl thel systeml isl thel blowerl offl delayl isl setl tool long.

Q:l Undersizedl ductworkl causes:

Answer:

Highl soundl levels;l Insufficientl airl quantities;l Highl staticl pressure

Q:l Forl accuracy,l thel preferredl locationsl forl thel temperaturel probesl whenl measuringl

temperaturel risel acrossl al heatl exchangerl inl al gasl furnacel isl to:

Answer:

Readl inletl templ inl thel returnl plenuml asl closel asl possiblel tol thel heatl exchanger.l Readl outletl templ inl supplyl plenuml asl closel asl possible,l butl beyondl "linel ofl sight"l tol thel heatl exchanger.

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