Download HVAC Systems: Troubleshooting and Safety Q&A and more Assignments Advanced Education in PDF only on Docsity!
1 | P a g e
NATE EXAM CORE ESSENTIALS |ACTUAL QUESTIONS
WITH 100% CORRECT ANSWERS
d (very important) - correct answer- The ability to utilize all types of communication skills is to the HVACR technician. a. not as important as "hands-on" technical skills b. somewhat important c. unimportant d. very important d (all of the above: clear, complete, concise) - correct answer- It is important to be in filling out service orders so that office staff, other technicians, and customers will know what work you completed on the job. a. clear b. complete c. concise
2 | P a g e d. all of the above
d. remind nthe ncustomer nthat nyou nare nthe nprofessional nand nget non nwith nyour nwork b n(1,600 nft3) n- ncorrect nanswer- nWhat nis nthe nvolume nof na nroom nthat nmeasures n 10 nft nby n 20 nft nwith nan n 8 - ft nceiling? a. 800 nft b. 1,600 nft c. 2,400 nft d. 3,200 nft b n(1,200 nCFM) n- ncorrect nanswer- nWhat nis nthe nCFM nrequirements nfor nan n1,800-ft2 nhouse nwith n 8 - ft nceilings, nif nfive nair nchanges nper nhour nare nneeded? a. 400 nCFM b. 1,200 nCFM c. 1,600 nCFM d. 2,400 nCFM c n(1,600 nCFM) n- ncorrect nanswer- nWhat nis nthe nCFM nrequirement nfor nan n2,400-ft2 nhouse nwith n 8 - ft nceilings, nif nfive nair nchanges nper nhour nare nneeded?
a. 400 nCFM b. 1,200 nCFM c. 1,600 nCFM d. 2,400 nCFM a n(79 nin2) n- ncorrect nanswer- nWhat nis nthe ncross-sectional narea nof na n 10 - in nround nmetal nduct? a. 79 nin b. 200 nin c. 314 nin d. 418 nin Note:nArea nof na ncircle n= nπ nx nradius^ d n(1,800 nft/min) n- ncorrect nanswer- nHow nfast ndoes nair nwith na nvelocity npressure nof n0.20 nin. nw.g. nmove nthrough na nround nduct? a. 400 nft/min b. 1,200 nft/min c. 1,600 nft/min d. 1,800 nft/min
a. ask nthe ncustomer nfor nreferrals b. collect npayment nin ncash nif npossible c. demonstrate nsystem noperation nand ndescribe nbasic nmaintenance nprocedures nto nthe ncustomer d. try nto nsell nthe ncustomer nan nequipment nupgrade d n(All nof nthe nabove: nit ncan ncut nhard nor nsoft ndrawn ncopper; nit nleaves nno nmetal nshavings nto ncontaminate nthe nsystem; nit nproduces na nclean, nsquare ncut.) n- ncorrect nanswer- nWhat nis nthe nadvantage nof nusing na ntube ncutter nto ncut ncopper npipe? a. It ncan ncut nhard nor nsoft ndrawn ncopper b. It nleaves nno nmetal nshavings nto ncontaminate nthe nsystem c. It nproduces na nclean, nsquare ncut d. All nof nthe nabove a n(soft ndrawn ncopper) n- ncorrect nanswer- nSpring-type nbenders nmay nbe nused non n. a. soft ndrawn ncopper b. hard ndrawn ncopper c. all ncopper npipe d. steel npipe
a n(make na nmechanical njoint nin ntubing) n- ncorrect nanswer-nAnflaring ntool nis nused nto n. a. make na nmechanical njoint nin ntubing b. measure npipe ndiameters c. remove nburrs nfrom npiping d. solder ntubing nwithout nthe nuse nof ncoupling d n(solder ntubing nwithout nthe nuse nof ncouplings) n- ncorrect nanswer- nA nswaging ntool nis nused nto n. a. cut ncopper ntubing b. make na nmechanical njoint nin ntubing c. remove nburrs nfrom npiping d. solder ntubing nwithout nthe nuse nof ncouplings a n(It nis nvery naccurate) n- ncorrect nanswer- nWhat nis none nof nthe nadvantages nof na nglass-stem nthermometer? a. It nis nvery naccurate b. It nis nvery ndurable c. It ncomes nwith na ndigital nreadout
b. Bourdon ntube c. Diaphragm d. Spring c n(30 nin. nHg nto n 350 npsig) n- ncorrect nanswer- nWhat nis nthe npressure nrange nof na nstandard ncompound ngauge non na nrefrigerant nmanifold? a. 0 nto n 350 npsig b. 0 nto n 500 npsig c. 30 nin. nHg nto n 350 npsig d. 30 nin. nHg nto n 500 npsig d n(Vacuum npump) n- ncorrect nanswer- nWhat nis nthe nbest ntool nfor nremoving nmoisture nand nnon-condensibles nfrom na nsystem nbefore nadding nrefrigerant? a. Manifold ngauge b. Micron nanalyzer c. Recovery nmachine d. Vacuum npump
b n(microns) n- ncorrect nanswer-nA nvacuum ngauge nreads npressure nin n. a. inches nof nmercury b. microns c. psia d. psig c n(Micronic) n- ncorrect nanswer- nWhich nof nthe nfollowing nis nnot na nmethod nof nleak ndetection? a. Soap nbubbles b. Electronic c. Micronic d. Ultrasonic a n(Recovery nmachine) n- ncorrect nanswer- nTo nprevent nthe nrelease nof nrefrigerant nto nthe natmosphere nwhile nremoving nit nfrom na nsystem, nwhat ntype nof nequipment nmust nbe nused? a. Recovery nmachine b. Recycling nmachine c. Reclaim nmachine d. Vacuum npump
c. proper nstorage nof nmaterials d. all nof nthe nabove b n(Goggles) n- ncorrect nanswer- nWhat ntype nof neye nprotection nshould nyou nwear nwhen ndrilling noverhead? a. Face nshield b. Goggles c. Side nshields d. Spectacles b n(DOT) n- ncorrect nanswer- nWhat nagency nregulates ncylinders nand nchemicals ntransported nin na nservice nvehicle? a. ASHRAE b. DOT c. EPA d. OSHA a n(contain ninformation nabout npersonal nprotective nequipment) n- ncorrect nanswer- nMaterial nsafety ndata nsheets n. a. contain ninformation nabout npersonal nprotective nequipment
b. do nnot nprovide nrecommendations nregarding nemergency nprocedures c. should nbe nkept nin na nsafe nplace noff-site d. should nbe nread nafter nany nchemical nproducts nhave nbeen nused d n(Never) n- ncorrect nanswer- nWhen nshould noxygen nbe nused nin na nrefrigeration nsystem? a. To nclear na nrestriction nin nthe nline b. Tonpressurizenfornleak-testing c. To npurge nlines nfor nbrazing d. Never c n(Class nA nis nan n"ordinary" nfire nthat ninvolves nthe nburning nof nwood, npaper, nor ntextile nproducts, nextinguishing nagent: nwater. nClass nB nis na nfire nthat ncontains noil, ngrease, npaint, nvarnish, nor nother nchemicals, nextinguishing nagent: nfoam. nClass nC nis nan nelectrical nfire, nextinguishing nagent: ncarbon ndioxide.) n- ncorrect nanswer- nWhich nof nthe nfollowing nclassifications nof nfire nextinguishers nshould nbe nused nfor nelectrical nfires? a. A b. B c. C d. D
b. 4 nft c. 5 nft d. 6 nft c n(maintain nthree npoints nof ncontact) n- ncorrect nanswer- nWhen nusing na nladder, nyou nshould nalways n. a. extend nthe nladder n 18 nin. nabove nthe nroof nline b. face naway nfrom nthe nladder c. maintain nthree npoints nof ncontact d. straddle nthe nspace nbetween nthe nladder nand na nnearby nobject a n(Disconnect nand nlock nout npower nbefore nstarting nunless ntesting nrequires nthe npower nto nbe non) n- ncorrect nanswer- nWhat nis none nof nthe nmost nimportant nsafety nprecautions nthat nyou ncan ntake nwhen nworking non nelectrical nequipment? a. Disconnect nand nlock nout npower nbefore nstarting nunless ntesting nrequires nthe npower nto nbe non b. Keep none nhand nin nyour npocket nwhile nworking non nthe npower ncircuit c. Label nall nhot nwires nbefore nstarting d. Wear ngloves nsuitable nfor nhigh nvoltages
a n(When ncurrent ntravels nthrough na nground npath nother nthan nthe nneutral) n- ncorrect nanswer- nWhen ndoes na nground nfault ncircuit ninterrupter nopen nan nelectric ncircuit? a. When ncurrent ntravels nthrough na nground npath nother nthan nthe nneutral b. When nthe ncircuit nis noverloaded c. When nthere nis na nshort ncircuit d. All nof nthe nabove b n(only nby nthe nperson nwho ninstalled nthe nlocks) n- ncorrect nanswer- nProper nlockout/tagout nprocedures nstate nthat nlocks nplaced non na nlockout ndevice nmay nbe nremoved n. a. by nanyone non nthe njob nsite b. only nby nthe nperson nwho ninstalled nthe nlocks c. only nafter nall nfuses nhave nbeen nreplaced d. only nwhen nthe nequipment nis ngrounded c n(evaporation) n- ncorrect nanswer- nA nnatural ncooling nprocess nproduced nby nmoisture non nthe nskin nchanging nto nlow-pressure nsteam nis ncalled n. a. conduction b. convection
a. liquid b. solid c. gas d. all nof nthe nabove c n(potential) n- ncorrect nanswer- nStored nenergy nis ncalled n energy. a. controlled b. kinetic c. potential d. quantum c n(sensible) n- ncorrect nanswer- nHeat nthat nyou ncan nfeel nand nmeasure ndirectly nwith na nthermometer nis ncalled n heat. a. absolute b. latent c. sensible d. super b n(latent) n- ncorrect nanswer- nThe nheat nenergy nchange nassociated nwith na nphase n(state) nchange nis ncalled n heat.
a. absolute b. latent c. sensible d. super d n(specific) n- ncorrect nanswer- nThe namount nof nheat n(Btu) nneeded nto nraise nthe ntemperate nof n 1 nlb nof na nsubstance n1°F nis ncalled nthe heat nof nthe nsubstance. a. absolute b. latent c. sensible d. specific b n(liquid, nsolid) n- ncorrect nanswer- nThe nlatent nheat nof nfusion nis nthe namount nof nenergy nrequired nto nchange n 1 nlb nof na nsubstance nfrom nthe n phase nto nthe n phase nwithout nchanging nits ntemperature. a. liquid, nvapor b. liquid, nsolid c. solid, nvapor d. vapor, nliquid
