ESCO LIGHT COMMERCIAL
REFRIGERATION EXAM WITH ALL
ANSWERS
In ba bdry btype b(direct bexpansion) bevaporator, bliquid brefrigerant bmust bboil baway
bas bclose bto bthe bend bof bthe bcoil bas bpossible bin border bto: b- bcorrect banswer-
The bdifference bbetween bthe btemperature bof bthe brefrigerant bboiling bin bthe
bevaporator band bthe btemperature bat btheevaporator boutlet bis bknown bas: b- bcorrect
banswer-
An bexpansion bdevice bthat bis bstuck bopen bwill bcause: b- bcorrect banswer-
When bmeasuring bevaporator bsuperheat bon ba bcommercial bsystem bthat bhas ba
blong bsuction bline, bthe bpressure breading bshould bbe btaken bat bthe: b- bcorrect
banswer-
Superheat bmeasurements bare bbest btaken: b- bcorrect banswer-
Atechnician bis bchecking bthe bsuperheat bon ba bmulti-circuit bevaporator band bfinds
bone bof bthe bcircuits bhas ba bsuperheat bthat bis bhigher bthan bthe bothers. bThis
bcould bbe bcaused bby: b- bcorrect banswer-
A bTEV bwith ban bexternal bequalizer bis bused bon: b- bcorrect banswer-
Some bspecial bapplications buse baflooded bevaporator b(operated bfull bof
brefrigerant). bnI border bto bmaintain bthe bproper blevel bof bliquid brefrigerant, ba
type bmetering bdevice bis bused. b- bcorrect banswer-
A bproperly bfunctioning bcondenser bwill bfirst; b- bcorrect banswer-
The beffect bof ban binefficient bwater bcooled bcondenser bwill; b- bcorrect banswer-
The brefrigerant bcondensing btemperature bin ba bwater bcooled bcondenser bis
bnormally babout
higher bthan bthe bleaving bwater. b- bcorrect banswer-
The brefrigerant bin ban bair bcooled bcondenser bwill bnormally bcondense bat
bapproximately
higher btemperature bthan bthe bair bpassing bover bit. b- bcorrect banswer-
he bthermostatic bexpansion bvalve b(TV) bmaintains ba bconstant__________ bin bthe
bevaporator. b- bcorrect banswer-
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