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BOMA-HVAC QUESTIONS WITH COMPLETE ANSWERS LATEST UPDATE
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BOMA-HVAC QUESTIONS WITH COMPLETE ANSWERS LATEST UPDATE
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BOMA-HVAC QUESTIONS WITHCOMPLETE ANSWERS LATEST UPDATE
laminar ffflow ff- ffAnswer ff- ffA ffstreamline ffor ffviscous ffflow.
- fflayers ffof ffwater ffflowing ffover ffone ffanother ffat ffdifferent ffspeeds ffwith ffvirtually ffno
ffmixing ffbetween fflayers.
- ffFluid ffparticles ffmove ffin ffdefinite ffand ffobservable ffpaths ffor ffstream fflines.
- ffThe ffflow ffis ffcharacteristic ffof ffviscous ff(thick) fffluid ffor ffis ffone ffin ffwhich ffviscosity ffof
ffthe fffluid ffplays ffa ffsignificant ffpart.
turbulent ffflow ff- ffAnswer ffIrregular ffmovement ffof ffparticles ffof ffthe fffluid.
What ffdo ffyou ffuse ffto ffdetermine ffquantity ffof ffair ffflowing ffthrough ffthe ffduct? ff-
ffAnswer ffCFM
What ffdo ffyou ffuse ffto ffdetermine ffthe ffspeed, ffrate ffor ffvelocity ffof ffair ffflow ffthrough ffa
ffduct? ff- ffAnswer ffFPM
What ffis ffthe ffstandard ffthat ffhad ffbeen ffused ffin ffdetermining ffthe ffamount ffof ffairflow
ffin ffrelation ffto ffrefrigeration ffeffect ff(tonnage)? ff- ffAnswer ff400 ffCFM ffper ffton ffof
ffcooling
What ffis ffit ffrecommended ffthat ffyou ffkeep ffyour fffacilities ffhumidity fflevels? ff- ffAnswer
ff30%-50% ff
Try ffto ffaim fffor ff45%
What ffare ffthe ffrecommended ffsummer ffand ffwinter fftemperatures? ff- ffAnswer
ffSummer- ff73 ffto ff79
Winter- ff68 ffto ff74
Metabolic ffrate ff- ffAnswer ffEverybody ffproduces ffheat ffdifferently
Psychrometry ff- ffAnswer ff- ffLooking ffat ffthe ffinteraction ff(relationship) ffof ffthe ffmoisture
ff( ffhumidity) ffand ffthe ffair ffitself.
- ffhow ffthe ffair ffis ffmoving ffor fftransferring ffheat ffthrough ffthe ffbuilding.
Dry ffBulb ff- ffAnswer ffThe fftemperature ffreading fffound ffon ffa fftypical ffthermometer.
Wet ffBulb ff- ffAnswer ffA fftypical ffthermometers ffstandard ffreading ffif ffthe ffsensing ffbulb
ffis ffcovered ffwith ffa ffwet ffwick ffor ffsock ffand ffexposed ffto ffair ffflow.
, Dew ffPoint ff- ffAnswer ff-At ffthis fftemperature, ffmoisture ffstarts ffcondensing fffrom ffthe
ffair.
-used ffto ffdefine ffthe fflevel ffthat ffair ffcan ffno fflonger ffhold ffextra ffmoisture, ffit ffhas
ffreached ff100% ffcapacity.
Specific ffVolume ff& ffDensity ff- ffAnswer ff- ffmeasured ffin ffcubic fffeet ffper ffpound.
- ffThe ffamount ffof ffspace ffair ffoccupies ffper ffpound ffof ffweight.
Enthalpy ff( ffheat ffcontent ffof ffa ffsubstance) ff- ffAnswer ff-The ffmeasurement ffof ffheat
ffenergy.
- ffmeasured ffby ffBTU.
Sensible ffheat ffratio ff- ffAnswer ffThe fftotal ffsensible ffheat ffflow ffdivided ffby ffthe fftotal
ffheat ffflow
Sensible ffheat ffflow ff- ffAnswer ffSupply ffair fftemperature ffminus ffconditioned ffroom
fftemperature
Moisture ffcontent ff(Humidity ffRatio) ff- ffAnswer ffThe fftotal ffweight ffof ffwater ffvapor ffper
ffpound ffof ffdry ffair
Relative ffhumidity ff- ffAnswer ffThe ffpercentage ffof ffwater ffvapor ffper ffpound ffof ffdry ffair
ffin ffrelation ffto ffhow ffmuch ffthe ffair ffcan ffhold ffat ffits ffcurrent fftemperature
Vapor ffpressure ff- ffAnswer ffMeasured ffin ffinches ffof ffmercury ffand ffrepresents ffthe
ffpressure ffexerted ffby ffwater ffvapor ffin ffair
The fffirst fflaw ffof ffthermodynamics ff- ffAnswer ffEnergy ffcan ffneither ffbe ffcreated ffnor
ffcan ffit ffbe ffdestroyed, ffbut ffcan ffonly ffchange ffforms.
The ffsecond fflaw ffof ffthermodynamics ff- ffAnswer ffHeat ffflows fffrom ffa ffhotter
fftemperature ff(intensity) ffto ffa ffcolder fftemperature ff(intensity)
What ffis ffthe ffdifference ffbetween ffheat ffand fftemperature? ff- ffAnswer ffHeat ffis ffa ffform
ffof ffenergy, ffwhile fftemperature ffis ffhow ffhot ffor ffcold ffsomething ffis.
Newton's fflaw ffof ffcooling ff- ffAnswer ffThe ffrate ffof ffheat ffloss ffof ffa ffbody ffis
ffproportional ffto ffthe ffdifference ffin fftemperatures ffbetween ffthe ffbody ffand ffits
ffsurroundings.
Effective ff- ffAnswer ffThe fftemperature ffat ffwhich ffmotionless ffsaturated ffair ffwould
ffinduce ffThe ffsame ffsensation ffof ffcomfort ffas ffthat ffinduced ffby ffthe ffactual ffconditions
ffof fftemperature, ffhumidity, ffand ffair ffmovement.
Wet-bulb ffdepression ff- ffAnswer ffThe ffdifference ffbetween ffthe ffdry ffbulb ffand ffthe ffwet
ffbulb fftemperature ffreadings.
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