MN Boiler License Questions with Correct Answers 100% Pass

MN Boiler License Questions with
Correct Answers 100% Pass
1. whatRareRtheRconditionsRnecessaryRforRgoodRcombustion?
a) lowRsulfurRcontentR
b) Thermal,Rthermocoupler,Rtubular
c) turbulence,Rtemperature,RtimeR3T'sR-RCORRECTRANSWERR-
c)Rturbulence,Rtemperature,RtimeR3T's



2. whyRisRsecondaryRairRnecessaryRinRhandRfiredRboilers?R
a) NecessaryRtoRburnRtheRcombustibleRgases
b) ifRprimaryRairRshouldRfail
c) usedRonlyRifRsulfurRcontentRisRhighR-RCORRECTRANSWERR-
a)RNecessaryRtoRburnRtheRcombustibleRgases



3. whenRpressureRincreasesRonRsteamRfromRaRgivenRamountRofRwaterRwhatRhappensRtoRitsRvol
umeRandRlatentRheat?R
a) increases
b) decreases
c) remainsRtheRsameR-RCORRECTRANSWERR-b)Rdecreases



4. whenRpressureRincreasesRonRsteamRfromRaRgivenRamountRofRwaterRwhatRhappensRtoRitsRte
mperature?R
a) increases
b) decreasesR
c) remainsRtheRsameR-RCORRECTRANSWERR-a)Rincreases



5. whenRcarbonRmonoxideR(co)RisRformedRandRcarbonRdioxideR(co2)RisRveryRhighRwhatRdoesRitR
generallyRsignify?R
a) MoreR"underRtheRfireRair"RisRneeded
b) lessR"underRtheRfireRair"RisRrequiredR
c) moreR"overRtheRfire"RairRisRneeded

, d) lessR"overRtheRfire"RisRneededRlessR-RCORRECTRANSWERR-
c)RmoreR"overRtheRfire"RairRisRneeded



6. excessRairRisRanRexpressionRthatRrefersRto:R
a) overabundanceRofRairR
b) theoreticalRamountRofRair
c) airRsuppliedRaboveRthatRtheoreticallyRrequiredR-RCORRECTRANSWERR-
c)RairRsuppliedRaboveRthatRtheoreticallyRrequired



7. aRgoodRpercentageRofRcarbonRdioxideRwhenRburningRoilRis:
a) 12%
b) 8R%R
c) 10%R-RCORRECTRANSWERR-a)R12%



8. whatRisRdraftRonRaRboilerRinRoperation?R
a) FlowRofRgasesRthroughRboiler
b) differenceRinRpressureRbetweenRatmosphereRandRfurnaceRorRfireboxR
c) differenceRbetweenRatmosphericRpressureRandRbreechingR-RCORRECTRANSWERR-
b)RdifferenceRinRpressureRbetweenRatmosphereRandRfurnaceRorRfirebox



9. whichRhasRgreaterRheatingRvalueRperRpound?
a) oilR
b) coalR-RCORRECTRANSWERR-a)RoilR(18000R-R19500RBTU)R
10. (coalRhasR(6900R-R12910RBTU))



11. heavyRoilRmustRbeRheatedRbeforeRenteringRtheRburnerRto:
a) increaseRcarbonRcontent
b) decreasedRsulfurRcontent
c) getRproperRatomizationR-RCORRECTRANSWERR-c)RgetRproperRatomization



12. whyRshouldRaRdailyRlogRbeRkeptRofRflueRgasRtemperature?R
a) ValuableRinformationRinRcaseRofRexplosionR

, b) superintendentRfilesRthem
c) changeRanRoperation,RcausingRheatRloss,RcanRbeRdetectedR-RCORRECTRANSWERR-
c)RchangeRanRoperation,RcausingRheatRloss,RcanRbeRdetected



13. findRSWPRofRaRboilerR72RinchesRinRdiameter,RthicknessRofRone-
halfRinch,RtensileRstrengthRofR55,000Rpounds,RquadrupleRrivetedRbuttRandRstrapRjointR(.94)Rf
actorRofRsafetyR5:
a) 14.3
b) 143.6
c) 1436R-RCORRECTRANSWERR-b)R143.6



14. theRtotalRheatRofRsteamRisR1,188RBTUs,RandRfeedRwaterRtemperatureRisR182RdegreesRFahren
heit.RWhatRisRtheRfactorRofRevaporation?
a) 107R
b) 10.7R
c) 1.07R-RCORRECTRANSWERR-c)R1.07



15. whyRwouldRviscosityRbeRimportantRinRfuelRoil?
a) moreRheatRisRrecoveredRinRwaterR
b) hasRmoreRvolatileRhydrocarbons
c) affectsReaseRwithRwhichRitRcanRbeRhandledR-RCORRECTRANSWERR-
c)ReffectsReaseRwithRwhichRitRcanRbeRhandled



16. whyRisRtooRmuchRairRobjectionable?R
a) CostRtooRhigh
b) lossRofRefficiency
c) corrosiveReffectR-RCORRECTRANSWERR-b)RlossRofRefficiency



17. whatRisRaRfyriteRusedRfor?
a) flueRgasRanalyzerR
b) combustionRprogrammerR
c) waterRanalysisR-RCORRECTRANSWERR-a)RflueRgasRanalyzer

, 18. absoluteRpressureRisR(ABS):
a) atmosphericRpressureR-RgaugeRpressureR
b) gaugeRpressureRminusRatmosphericRpressureR
c) atmosphericRpressureR+RgaugeRpressureR-RCORRECTRANSWERR-
c)RatmosphericRpressureR+RgaugeRpressure



19. whenRpressureRofRsteamRincreases,RwhatRhappensRtoRtheRtemperature?R
a) GoesRupR
b) goesRdown
c) remainsRtheRsameR-RCORRECTRANSWERR-a)RGoesRup



20. findRtheRsquareRfeetRofRheatingRsurfaceRofRaRfluR4"RinRdiameterRandR20'RinRlength:R
a) 25'sq
b) 251.32'sq
c) 2513'sq
d) 20.93'sqR-RCORRECTRANSWERR-d)R20.93'sq



21. whatRisRtheRminimumRsizeRofRtheRpipesRconnectingRtheRboilerRtoRtheRwaterRcolumn?
a) 3/4Rinch
b) 1Rinch
c) 1/2RinchR-RCORRECTRANSWERR-a)R3/4Rinch



22. whyRareRcrossesRusedRinsteadRofRellsRonRwaterRcolumnRconnections?
a) CostRless
b) hasRmoreRstrength
c) lineRmayRbeReasilyRcleanedR-RCORRECTRANSWERR-c)RlineRmayRbeReasilyRcleaned



23. canRyouRhaveRvalvesRbetweenRboilerRandRwaterRcolumn?
a) Yes,RifRtheyRareRlockedRorRsealedRopen
b) no,RtheyRmightRbeRclosedRaccidentally
c) onlyRifRtheRboilerRisRunderR100RhorsepowerR-RCORRECTRANSWERR-
a)RYes,RifRtheyRareRlockedRorRsealedRopen