NATEl Gasl l Heatl Examl Latestl 2026l

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

Q:l Thel threel majorl furnacel configurationsl are:

l A:l Up-flow,l down-flowl andl lowboy

l B:l Up-flow,l down-flowl andl horizontal

l C:l Up-flow,l down-flowl andl cross-flow

l D:l Nonel ofl thesel isl correct

Answer:

B:l Up-flow,l down-flowl andl horizontal

Q:l Residentiall gasl furnacesl usel blowersl poweredl byl whichl typesl ofl motors?

l A:l Poly-phase,l twol phase,l singlel phasel andl capacitorl start

l B:l Shadedl pole,l split-phase,l capacitorl startl andl PSC

l C:l Threel phase,l shadedl polel andl PSC

l D:l Split-phase,l inductionl start-inductionl runl andl variablel speedl DC

Answer:

D:l Split-phase,l inductionl start-inductionl runl andl variablel speedl DC

Q:l Thel horsepowerl rangel ofl residentiall heatingl blowerl motorsl is:

l A:l 1⁄8l tol 1⁄16l hp

l B:l 1⁄4l tol 1⁄2l hp

l C:l 1⁄2l tol 2l hp

l D:l 3⁄4l tol 2l hp

Answer:

B:l 1⁄4l tol 1⁄2l hp

Q:l Al heatl anticipatorl isl wired: l A:l Inl seriesl withl thel "W"l terminal 1 / 4

l B:l Inl parallell withl thel "W"l terminal

l C:l Inl seriesl withl thel "R"l terminal

l D:l Inl parallell withl thel "R"l terminal

Answer:

A:l Inl seriesl withl thel "W"l terminal

Q:l Placingl al jumperl wirel betweenl thel "R"l terminall andl thel "G"l terminall onl al

thermostatl subbasel willl energizel the:

l A:l Gasl valve

l B:l Indoorl fanl motor

l C:l Outdoorl fanl motor

l D:l Compressor

Answer:

B:l Indoorl fanl motor

Q:l Placingl al jumperl wirel betweenl thel "R"l terminall andl thel "W"l terminall onl al

thermostatl sub-basel willl energizel the:

l A:l Gasl valve

l B:l Indoorl fanl motor

l C:l Outdoorl fanl motor

l D:l Compressor

Answer:

A:l Gasl valve

Q:l Carbonl monoxidel isl a:

l A:l Productl ofl incompletel combustion

l B:l Poisonousl gas

l C:l Odorlessl gas

l D:l Alll ofl thel abovel arel correct

Answer:

D:l Alll ofl thel abovel arel correct

Q:l Thel chemicall symboll forl carbonl monoxidel is:

l A:l CO2 2 / 4

l B:l CO

l C:l H2O

l D:l NH3

Answer:

B:l CO

Q:l Selectingl al lowerl speedl tapl settingl onl al furnacel indoorl blowerl motorl willl cause:

l A:l Thel temperaturel risel throughl thel furnacel tol increase

l B:l Thel temperaturel risel throughl thel furnacel tol decrease

l C:l Thel temperaturel risel throughl thel furnacel willl notl bel affected

l D:l Thel furnacel tol actl asl al humidifier

Answer:

A:l Thel temperaturel risel throughl thel furnacel tol increase

Q:l "Carryl over"l channelsl orl "crossl overs"l arel usedl to: l A:l Carryl unusedl excessl fuell backl tol thel fluel wherel itl isl sentl upl thel stack

l B:l Carryl primaryl airl tol thel heatl exchanger

l C:l Carryl secondaryl airl tol thel heatl exchanger

l D:l Carryl thel flamel froml thel firstl burnerl thatl lightsl tol thel remainingl burners

Answer:

D:l Carryl thel flamel froml thel firstl burnerl thatl lightsl tol thel remainingl burners

Q:l Modernl high-efficiencyl burnersl usel combustionl blowers.l Whatl arel thel twol majorl typesl ofl combustionl blowers?

l A:l Inducedl draftl andl forcedl draft

l B:l Highl pressurel andl lowl pressure

l C:l Impellerl typel andl centrifugall type

l D:l Liquidl andl vaporl types

Answer:

A:l Inducedl draftl andl forcedl draft

Q:l Thel purposel ofl thel combustionl blowerl isl to: l A:l Causel anl adequatel amountl ofl oxygen-richl airl tol mixl withl thel fuell forl betterl combustion 3 / 4

l B:l Pushl thel productsl ofl combustionl outl ofl thel building

l C:l Preventl carbonl monoxidel froml enteringl thel heatl exchanger

l D:l Givel thel largerl blowerl motorl al rest

Answer:

A:l Causel anl adequatel amountl ofl oxygen-richl airl tol mixl withl thel fuell forl betterl combustion

Q:l Heatl transfersl froml anl objectl orl areal atl al higherl temperaturel tol anl objectl orl areal atl al lowerl temperature.l Al heatedl heatl exchangerl transfersl heatl tol thel airl by:

l A:l Conduction

l B:l Naturall convection

l C:l Radiation

l D:l Forcedl convection

Answer:

D:l Forcedl convection

Q:l Thel voltagel thatl createsl al sparkl onl al sparkl ignitionl systeml isl approximately:

l A:l 240l volts

l B:l 5,000l volts

l C:l 15,000l volts

l D:l 25,000l volts

Answer:

C:l 15,000l volts

Q:l Thel capacityl ofl al naturall gasl furnacel isl de-ratedl byl _______l forl everyl 1000l feetl

abovel seal level:

l A:l 1%

l B:l 2%

l C:l 3%

l D:l 4%

Answer:

D:l 4%

Q:l Al crackl inl al heatl exchangerl can:

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