ESCO HVACR 2023 Air Conditioning Practic
Correct Answers
Refrigerant cR-134-A cvapor centers cthe ccondenser cat c125 cpsig, c100 cdegrees cF. cIt cleaves cas ca
csub-cooled c20 cF, cand cthe cpressure cwill cbe capproximately: c- cCORRECT cANS✔✔124 cpsig
Bubbles cin ca csight cglass ccould cbe can cindication cof: c- cCORRECT cANS✔✔a crefrigerant cblend c
Water cwill cvaporize cat c________________ ctemperature cin ca c28 cin cHg cvacuum. c- cCORRECT c
Back cSeating ca ctwo cway cservice cvalve cresults cin: c- cCORRECT cANS✔✔closed cservice cport cw
When ctopping coff can coperating csystem ccontaining ca cblended crefrigerant: c- cCORRECT cANS✔✔
cthe cjug cas ca cLIQUID cand cintroduce cthe crefrigerant cas ca cVAPOR cinto cthe clow cside cusing ca ct
cmanifold cgauge.
If ca csmall cair cconditioner chas conly ca cvery clow, cinsignificant crefrigerant cpressure cdrop cthrough
cmanufacturer cmay cuse? c- cCORRECT cANS✔✔an cinternal cequalized cthermostatic cexpansion cv
Air cor cother cnon-condensable cgases cin ca ccapillary ctube cair cconditioning csystem cwill ccause cthe
cANS✔✔low csuction cpressure cand chigh cdischarge cpressure
A cTXV csensing cbulb cwhich cbecomes cdetached cfrom cthe csuction cline cwill ccause cthese csympto
csuction cpressure cand clower cthan cnormal cdischarge cpressure
Heat cwhich ccauses ca cchange cin ctemperature cof ca csubstance cis ccalled: c- cCORRECT cANS✔✔
Heat cadded cto ca csubstance cwithout ca crise cin ctemperature; c(example: cliquid crefrigerant cto cgas
cCORRECT cANS✔✔Latent cHeat cof cVaporization
Heat cadded cto cthe crefrigerant cin ca cvapor cstate cafter cthe cevaporation cprocess cis ccalled: c- cCOR
Scroll cCompressors cmoves crefrigerant cby cmeans cof: c- cCORRECT cANS✔✔Involute cSpirals
The cmovement cof cheat cby cdirect ccontact cis: c- cCORRECT cANS✔✔Conduction
The cstandard cunit cfor cmeasuring cthe cquantity cof cheat cin ca csubstance cis: c- cCORRECT cANS✔
A crefrigerant cgives cup cheat cwhen; c- cCORRECT cANS✔✔it ccondenses
Why cmust crefrigerant cin cthe csuction cline cbe cslightly cwarmer cthan cthe csaturation ctemperature?
cliquid cslugging cof cthe ccompressor
Correct Answers
Refrigerant cR-134-A cvapor centers cthe ccondenser cat c125 cpsig, c100 cdegrees cF. cIt cleaves cas ca
csub-cooled c20 cF, cand cthe cpressure cwill cbe capproximately: c- cCORRECT cANS✔✔124 cpsig
Bubbles cin ca csight cglass ccould cbe can cindication cof: c- cCORRECT cANS✔✔a crefrigerant cblend c
Water cwill cvaporize cat c________________ ctemperature cin ca c28 cin cHg cvacuum. c- cCORRECT c
Back cSeating ca ctwo cway cservice cvalve cresults cin: c- cCORRECT cANS✔✔closed cservice cport cw
When ctopping coff can coperating csystem ccontaining ca cblended crefrigerant: c- cCORRECT cANS✔✔
cthe cjug cas ca cLIQUID cand cintroduce cthe crefrigerant cas ca cVAPOR cinto cthe clow cside cusing ca ct
cmanifold cgauge.
If ca csmall cair cconditioner chas conly ca cvery clow, cinsignificant crefrigerant cpressure cdrop cthrough
cmanufacturer cmay cuse? c- cCORRECT cANS✔✔an cinternal cequalized cthermostatic cexpansion cv
Air cor cother cnon-condensable cgases cin ca ccapillary ctube cair cconditioning csystem cwill ccause cthe
cANS✔✔low csuction cpressure cand chigh cdischarge cpressure
A cTXV csensing cbulb cwhich cbecomes cdetached cfrom cthe csuction cline cwill ccause cthese csympto
csuction cpressure cand clower cthan cnormal cdischarge cpressure
Heat cwhich ccauses ca cchange cin ctemperature cof ca csubstance cis ccalled: c- cCORRECT cANS✔✔
Heat cadded cto ca csubstance cwithout ca crise cin ctemperature; c(example: cliquid crefrigerant cto cgas
cCORRECT cANS✔✔Latent cHeat cof cVaporization
Heat cadded cto cthe crefrigerant cin ca cvapor cstate cafter cthe cevaporation cprocess cis ccalled: c- cCOR
Scroll cCompressors cmoves crefrigerant cby cmeans cof: c- cCORRECT cANS✔✔Involute cSpirals
The cmovement cof cheat cby cdirect ccontact cis: c- cCORRECT cANS✔✔Conduction
The cstandard cunit cfor cmeasuring cthe cquantity cof cheat cin ca csubstance cis: c- cCORRECT cANS✔
A crefrigerant cgives cup cheat cwhen; c- cCORRECT cANS✔✔it ccondenses
Why cmust crefrigerant cin cthe csuction cline cbe cslightly cwarmer cthan cthe csaturation ctemperature?
cliquid cslugging cof cthe ccompressor
