Exam (elaborations)
COMMERCIAL REFRIGERATION FINAL TEST WITH ALL ANSWERS verified
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COMMERCIAL REFRIGERATION FINAL TEST WITH ALL ANSWERS verified
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HVAC nESCO nBasic nTestnReview
1. A nliquid nto nsuction nheat nexchanger nis noften nused nto
A. Decrease n Vapor n Superheat
B. Increase nliquid nsubcooling
C. Decrease nhead npressure
D. Increase nFlash ngas nin nthe nsuction nline: nB. nIncrease nliquid nsubcooling
2. The nterm, nrefrigerant nconditions nrefer nto nwhich nof nthe nfollowing
A. Saturated n,superheat, nor nsubcooling nrefrigerant
B. Pressurized nrefrigerant nonly
C. A nsystem nin na ncomplete nvacuum
D. the noutdoor nambient nair ntemperature: nA. nSaturated, nsuperheat, nor
nsubcooling
3. The ncomponent nin nthe nrefrigeration nsystem nused nto ncatch nand nprevent
nliquid nfrom nentering nthe ncompressor nis ncalled nthe
A. Liquid nreceiver
B. The naccumulator
C. The noil nseparator
D. The nfilter ndryer: nB. nThe nAccumulator
4. An nair nconditioning nsystem nor nheat npump nmust nhave
A. 550-600 ncubic nfeet nof nair nper nminute nacross nthe nevaporator ncoil
B. 500-550 ncubic nfeet nof nair nper nminute nacross nthe nevaporator ncoil
C. 400-450 ncubic nfeet nof nair nper nminute nacross nthe nevaporator ncoil
D. Less nthan n400 ncubic nfeet nof nair nper nminute nacross nthe nevaporator
ncoil: nC. n400-450 ncubic nfeet nof nair nper nminute nacross nthe nevaporator
ncoil
5. The nrefrigerant ncharge nin na nTXV nremote nbulb nor npower nelement nmust
A. Be nchanged nwhen nthe nfilter ndryer nis nchanged
B. Have nsimilar ncharacteristics nto nthe nrefrigerant nin nthe nsystem
C. Be ndischarged nbefore nit nis neffective
D. Have npressure nsimilar nto nR-134A: nB. nHave nsimilar ncharacteristics nto
nthe nrefrig- nerant nin nthe nsystem
6. The nremote nbulb nof na nTXV nshould nbe nfastened nto nthe
A. Outlet nof nthe nTXV, nabout n6 ninches
B. Inlet nof nthe nTXV nabout n6 ninches
C. Outlet nof nthe ncondenser, nand non nthe nsuperheat nline
D. Outlet nof nthe nevaporator: nD. nOutlet nof nthe nevaporator
7. which nof nthe nfollowing nis nTRUE, nof na nsolenoid nvalue nin na npump ndown
nsystem?
A. It nis nlocated nafter nthe nmetering ndevice
1 n/
, HVAC nESCO nBasic nTest
nReview
B. It nis nlocated nbefore nthe nmetering ndevice
C. It nis nlocated nafter nthe nevaporator
D. It nis nused ninstead nof na nmetering ndevice: nB. nIt nis nlocated nbefore nthe
nmetering ndevice
2 n/
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