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HVAC PRETEST BOMA QUESTIONS WITH COMPLETE ANSWERS
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HVAC PRETEST BOMA QUESTIONS WITH COMPLETE ANSWERS
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HVAC PRETEST BOMA QUESTIONSWITH COMPLETE ANSWERS
Two ppbasic ppcategories ppof ppchillers ppare ppthe pp___.
a. ppCompression ppcycle ppand ppabsorption
b. pppurge ppand ppabsorption
c. ppabsorption ppand pplithium ppbromide
d. pppurge ppand pplithium ppbromide pp- ppAnswer ppa. ppCompression ppcycle ppand
ppabsorption
The ppfive pprequirements ppfor ppcomfort ppare ppproper pptemperature, pphumidity,
ppfiltration, pp_____, ppand ppventilation.
a. ppcirculation
b. ppvelocity
c. ppsq.ft.
d. ppnone ppof ppthe ppabove pp- ppAnswer ppa. ppcirculation
The ppprimary ppfunction ppof ppan ppexpansion ppdevice ppis ppto pp____.
a. ppproduce ppa ppreduction ppin ppthe pppressure ppon ppthe ppliquid pprefrigerant
b. ppregulate ppthe ppflow ppof pprefrigerant ppinto ppthe ppevaporator
c. pplower ppthe ppboiling pppoint ppof ppthe pprefrigerant ppfar ppenough ppbelow ppthe
pptemperature ppof ppthe ppload ppto ppget ppthe ppneeded ppheat pptransfer pprate
d. ppall ppof ppthe ppabove pp- ppAnswer ppd. ppall ppof ppthe ppabove
The ppwet-bulb ppdepression ppis pp____.
a. ppthe ppdifference ppbetween ppthe ppdry-bulb ppand ppwet-bulb pptemperatures
b. ppthe ppsame ppas ppthe ppwet-bulb pptemperatures
c. ppthe ppsame ppas ppthe ppdry-bulb pptemperatures
d. ppwhen ppthe ppair ppis ppsaturated ppwith ppmoisture pp- ppAnswer ppa. ppthe ppdifference
ppbetween ppthe ppdry-bulb ppand ppwet-bulb pptemperatures
,The ppdew-point pptemperature ppis ppthe pp___.
a. pptemperature ppwhen ppthe ppair ppis ppsaturated ppwith ppmoisture
b. pptemperature ppwhen ppthe ppmoisture ppbegins ppto ppcondense ppout ppof ppthe ppair
c. ppdifference ppbetween ppthe ppdry-bulb ppand ppwet-bulb pptemperatures
d. pptemperature ppof ppthe ppair ppat pp50% pprelative pphumidity pp- ppAnswer ppb.
pptemperature ppwhen ppthe ppmoisture ppbegins ppto ppcondense ppout ppof ppthe ppair
How ppmany ppBtus ppare pprequired ppto ppchange ppone pppound ppof ppice ppat pp20°F ppto
ppsteam ppat pp220°F? pp
a. pp1,304 ppBtu/h
b. pp2,608 ppBtu/h
c. pp6,520 ppBtu/h
d. pp3,912 ppBtu/h pp- ppAnswer ppa. pp1,304 ppBtu/h
If ppan ppR-12 pprefrigeration ppsystem ppis ppoperating ppwith ppa pp25.4 pppsig ppsuction
pppressure, ppwhat ppis ppthe ppevaporator ppsuperheat ppif ppthe ppevaporator ppoutlet
pptemperature ppis pp34 ppdegrees ppF.
a. pp9°F
b. pp59°F
c. pp34°F
d. pp25°F pp- ppAnswer ppa. pp9°F
On ppan ppR-11 ppor ppR-123 ppsystem, ppthe pprefrigerant ppremoval ppprocess ppnormally
ppstarts ppwith ppthe ppremoval ppof pp____. pp
a. ppwater
b. ppliquid pprefrigerant
c. ppvapor pprefrigerant
d. ppoil pp- ppAnswer ppb. ppliquid pprefrigerant
The ppcondenser ppin ppa pprefrigeration ppsystem pp___.
a. ppdesuperheats ppthe ppvapor ppfrom ppthe ppcompressor
b. ppcondenses ppthe ppvapor ppfrom ppthe ppcompressor
c. ppsubcools ppthe ppliquid pprefrigerant ppbefore ppit ppleaves ppthe ppcondenser
d. ppall ppof ppthe ppabove pp- ppAnswer ppd. ppall ppof ppthe ppabove
The pphuman ppbody ppgives ppoff ppheat ppby ppwhich ppof ppthe ppfollowing?
a. ppconvection
b. ppradiation
c. ppconduction
d. ppall ppof ppthe ppabove pp- ppAnswer ppd. ppall ppof ppthe ppabove
, If ppthe pptemperature ppremains ppconstant ppand ppthe ppvolume ppthat ppa ppgas ppoccupies
ppincreases, ppthe pppressure ppwill pp____. pp
a. ppdecrease
b. ppincrease
c. ppremain ppthe ppsame
d. ppcannot ppbe ppdetermined ppfrom ppthe ppinformation ppgiven. pp- ppAnswer ppa.
ppdecrease
Transformers ppare pprated ppusing pp___.
a. ppvolt-amperes
b. ppvolt-ohms
c. ppamperes-ohms
d. ppvolt-resistance pp- ppAnswer ppa. ppvolt-amperes
Measuring ppvelocity pppressure ppin ppa ppduct ppindicates ppthe pp___.
a. ppvolume ppof ppair ppthrough ppa ppduct
b. ppspeed ppat ppwhich ppthe ppair ppis ppmoving
c. pppressure ppagainst ppthe ppsides ppof ppthe ppduct.
d. ppweight ppof ppthe ppair ppmoving ppthrough ppthe ppduct. pp- ppAnswer ppb. ppspeed ppat
ppwhich ppthe ppair ppis ppmoving
A ppsolid ppmaterial ppexerts ppa pppressure ppor ppforce pp___.
a. ppin ppall ppdirections
b. ppdownward pponly
c. ppoutward ppand ppdownward
d. ppoutward pponly pp- ppAnswer ppb. ppdownward pponly
Pure ppwater ppboils ppat ppa pptemperature ppof pp212°F ppat ppwhich ppof ppthe ppfollowing
ppstandard ppconditions?
a. pp12.967psi
b. pp13.967psi
c. pp14.967psi
d. pp15.967psi pp- ppAnswer ppc. pp14.967psi
Which ppof ppthe ppfollowing ppwould ppallow ppa ppsystem ppto ppoperate ppmore ppefficiently?
pp
a. ppcondenser ppthat pphad pprefrigerant ppleaving ppwith pp10° ppof ppsubcooling
b. ppcondenser ppthat pphad pprefrigerant ppleaving ppwith pp15° ppof ppsubcooling
c. ppcondenser ppthat pphad pprefrigerant ppleaving ppas pp100% ppvapor
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