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HVAC LEVEL 1 EXAM QUESTIONS WITH CORECT ANSWERS 2025

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HVAC LEVEL 1 EXAM QUESTIONS WITH CORECT ANSWERS 2025

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Uploaded on: January 18, 2025
Number of pages: 58
Written in: 2024/2025
Type: Exam (elaborations)
Contains: Questions & answers

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hvac level 1 exam questions with corect answers 20

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HVAC LEVEL 1 EXAM QUESTIONS WITH
CORECT ANSWERS 2025
WhatYareYtheY3YgasYlaws?Y-YCORRECTYANSWERY-BoylesYlaw,YCharlesYlaw,YgeneralYgasYlaw

WhatYisYoneYwattYequalYtoYinYbtu'sY-YCORRECTYANSWERY-3.412

WhatYisY1YhorsepowerYequalYtoYinYwatts?Y-YCORRECTYANSWERY-746Ywatts

whatYisY1YhorsepowerYofYworkY-YCORRECTYANSWERY-33,000Yft/lbs/min

WhatYisYnetYrefrigerationYeffectYformula,YNRE?Y-YCORRECTYANSWERY-evap.YoutY-Yevap.Yin

WhatYisYCOPYusedYfor?Y-YCORRECTYANSWERY-ratingYaYsystemYforYheating

whatYisYtheYseerYusedYforY-YCORRECTYANSWERY-ratingYaYsystemYforYcooling

whatYfactorsYareYusedYinYBoylesYlawY-YCORRECTYANSWERY-pressure,Yvolume

whatYfactorsYareYusedYinYCharlesYlawY-YCORRECTYANSWERY-volumeYandYtempurature

whatYfactorsYareYusedYinYtheYgeneralYgasYlawY-YCORRECTYANSWERY-pressure,YvolumeYandYtempurature

whatYisYinductiveYreactanceY-YCORRECTYANSWERY-OppositionYtoYcurrentYflowYinYaYcircuitYdueYtoYinduction.

whatYisYcapacitiveYreactanceY-YCORRECTYANSWERY-
TheYoppositionYofYACYcurrentYflowYcausedYbyYaYcapacitor.

WhatYisYimpedance?Y-YCORRECTYANSWERY-
ItYisYtheYcombinedYeffectYofYresistance,YinductiveYreactance,YandYcapacitiveYreactanceYinYanYACYcircuit.

,whatYisYheatYofYcompressionY-YCORRECTYANSWERY-
theYamountYofYheatYaddedYtoYrefrigerantYduringYcompression

whatYisYtheYheatYofYrejectionY-YCORRECTYANSWERY-
theYamountYofYheatYremovedYfromYtheYsystemYwhenYitYentersYtheYcondenser

WhatYisYsubcooling?Y-YCORRECTYANSWERY-
LoweringYliquidYrefrigerantYtemperatureYbelowYitsYsaturationYtemperature

WhatYisYflashYgas?Y-YCORRECTYANSWERY-
RoughlyY25%YofYtheYliquidYleavingYtheYmeteringYdeviceYthatYimmediatelyYvaporizes.

whatYisYtheYequationYforYcompressionYratioY-YCORRECTYANSWERY-
absoluteYhighYsideYpressureY/YabsoluteYlowYsideYpressure

whatYcanYcauseYaYhighYcompressionYratioYonYtheYhighYsideY-YCORRECTYANSWERY-
dirty/YblockedYcoil,YrecirculatingYair,YdefectiveYfan,YdefectiveYwiring,YdefectiveYmotorYcomponents

whatYcanYcauseYaYhighYcompressionYratioYonYtheYlowYsideY-YCORRECTYANSWERY-
dirty/YblockedYevaporator,YdirtyYairYfilterY,YdefectiveYevap.Yfan,YdirtyYblower,YbeltYissues(ifYbeltYdriven)

whatYisYanotherYnameYforYtheYblowerYwheelY-YCORRECTYANSWERY-squirlYcage

whatYpercentageYofYcallsYareYelectricalYorYmaintenanceYissuesY-YCORRECTYANSWERY-90%

whatYdoesYSEERYstandY-YCORRECTYANSWERY-seasonalYenergyYefficiencyYratio

whatYdoesYCOPYstandYforY-YCORRECTYANSWERY-CoefficientYofYperformance

WhatYisYdensity?Y-YCORRECTYANSWERY-MassYperYunitYvolume

,WhatYisYspecificYheat?Y-YCORRECTYANSWERY-
TheYamountYofYenergyYneededYtoYraiseYtheYtemperatureYofY1YgramYofYaYsubstanceYbyY1YdegreeYCelsius.

whatYisYspecificYgravityY-YCORRECTYANSWERY-
theYratioYofYtheYdensityYofYaYsubstanceYtoYtheYdensityYofYwater

whatYisYspecificYvolumeY-YCORRECTYANSWERY-volumeYperYunitYmass(YreciprocalYofYdensity)

whatYisYenergyYpurchasedYinY-YCORRECTYANSWERY-kilowatts

whatYisYtheYequationYforYworkY-YCORRECTYANSWERY-workY=YforceYxYdistance

whatYisYtheYconversionYfromYwattYtoYkilowattY-YCORRECTYANSWERY-1YkW=Y1000YW

whatYisYabsoluteYpressureY-YCORRECTYANSWERY-14.696

WhatYisYtypeYL-YcopperYtubingYusedYfor?Y-YCORRECTYANSWERY-branchYwaterYsupply

whatYisYtypeYkYcopperYusedYforY-YCORRECTYANSWERY-waterYlines,Yoil

WhatYisYPVCYusedYfor?Y-YCORRECTYANSWERY-PVC:YWellies,Yraincoats,Y

uPVC:YDrainpipes,Ywindow/doorYframes

ElectricalYwireYinsulation

whatYisYbrazingYtemperaturesY-YCORRECTYANSWERY-1205f-Y1550f

whatYisYsolderingYtemp.Y-YCORRECTYANSWERY-361f-Y500f

, whatYisYsilverYsolderYtemp.Y-YCORRECTYANSWERY-800fYtoY1200f

whatYisYsilverYsolderYusedYforY-YCORRECTYANSWERY-copperYtoYcopperYandYcopperYtoYbrassYconnections

whatYareYtheY3YforcesYofYaYthermostaticYexpansionYvalveY-YCORRECTYANSWERY-
bulbYpressure,YspringYpressureYandYequalizingYpressure

refrigerantYtanksYcanYonlyYbe___________YfullY-YCORRECTYANSWERY-80%

WhatYisYtareYweight?Y-YCORRECTYANSWERY-TheYweightYofYanYemptyYcylinder.

UsedYrefrigerantYthatYhasYbeenYreprocessedYtoYbringYitYupYtoYtheYstandardsYrequiredYofYnewYrefrigerantYisY
calledY_________?Y-YCORRECTYANSWERY-reclaim

AYclassYofYrefrigerantsYthatYcontainsYhydrogen,Ychlorine,Yfluorine,YandYcarbonYisYcalledY_______?Y-
YCORRECTYANSWERY-HCFCY(Hydrochlorofluorocarbon)YRefrigerant.

A(n)Y___________YisYaYheatYexchangerYthatYtransfersYheatYfromYtheYairYflowingYoverYitYtoYtheYcoolerYrefrige
rantYflowingYthroughYit.Y-YCORRECTYANSWERY-evaporator

AYclassYofYrefrigerantsYthatYcontainsYchlorine,Yfluorine,YandYcarbonYisYcalledY__________?Y-
YCORRECTYANSWERY-CFCY(Chlorofluorocrbon)Yrefrigerant.

TheYremovalYandYtemporaryYstorageYofYrefrigerantYinYcontainersYapprovedYforYthatYpurposeYisYcalledY____
_______.Y-YCORRECTYANSWERY-Recovery

AYliquidYmeteringYdeviceYisYalsoYknownYasYa(n)Y__________?Y-YCORRECTYANSWERY-expansionYdevice

WhatYdoesYtheYcondenserYdo?Y-YCORRECTYANSWERY-RemovesYlatentYheatYandYchangesYvaporYtoYliquid

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HVAC LEVEL 1 EXAM QUESTIONS WITH CORECT ANSWERS 2025

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