FreeASEStudyGuidePracticeTest TrueorFalse.Chlorinewasfoundtododamagetotheozonelayer?-ANS-True TrueorFalse.Differentrefrigerantareoktobemixedtogether.Pressurecharacteristics arealittlebitdifferentbutshouldnotmatter.-ANS-False.Highpressurecharacteristics betweenR12andR134avaryconsiderably.Willresultinhighheadpressureandhigh system.Avehiclehaspoorairconditioningperformance.ThecustomerhasaddedR134a refrigeranttothesystem.TechnicianAsaystousearefrigerantidentifier.TechnicianB saysrefrigerantmixturesarenotrecommended,butwillnotaffectsystempressures.Whoiscorrect?A.TechA B.TechB C.Both D.Neither-ANS-TechAiscorrect Asquealisheardonlywhenthecompressorclutchfirstengages.TechnicianAsaysthis iscausedbyalooseserpentinebelt.TechnicianBsaysthisiscausedbyawornclutch pulleybearing.Whoiscorrect?A.TechA B.TechB C.Both D.Neither-ANS-Techiscorrect Anairconditioningsystemwithavariabledisplacementcompressorhaspoor
performanceinhighdemandsituations.AllofthesecouldbethecauseEXCEPT:
A.Alowrefrigerantcharge.B.Afaultycontrolvalve.C.Afaultylowpressureswitch.D.Aweakcompressor.-ANS-C WhatkindofA/Ccompressorusesacontrolvalvetoaltersystempressures- ANS-Variabledisplacementcompressor
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