STATIONARY ENGINEER QUESTIONS AND CORRECT VERIFIED ANSWERS

STATIONARY ENGINEER QUESTIONS
AND CORRECT VERIFIED ANSWERS
HowA2muchA2clearanceA2fromA2theA2topA2ofA2theA2boilerA2isA2neededA2forA2aA2HPA2boilerA2t
hatA2producesA270000A2lbsA2ofA2steam?A2-A2Ans--7A2feet

OnA2aA2gasA2firedA2boilerA2whatA2isA2theA2properA2gasA2toA2airA2mixtureA2-A2Ans--30%-
70%A2andA2inA2specialA2arrangementsA2itA2canA2beA2asA2highA2asA2100%A2.A2ANSWERA2C
HAPTERA211A2remember%

WhatA2isA2theA2totalA2hardnessA2inA2aA2systemA2thatA2wasA2foundA2toA2haveA2calciumA2har
dnessA2ofA260ppmA2andA2magnesiumA2hardnessA2ofA218ppmA2andA2carbonA2hardnessA2of
A212A2ppm?A2-A2Ans--TH=(CaA2xA22.5)A2+A2(MgA2xA24.1)\nTH=(60A2xA22.5)A2+A2(18A2xA24.1)\
nTH=A2150+73.8A2=(A2223.8A2PPM)

HowA2oftenA2shouldA2aA2completeA2externalA2inspectionA2ofA2theA2boilerA2beA2done?A2-
A2Ans--OnceA2aA2Shift


WithA224A2hrA2operationA2howA2oftenA2doA2youA2checkA2theA2waterA2level?A2-A2Ans--
OnceA2perA2shift

HowA2oftenA2doA2youA2checkA2theA2LWCO?A2-A2Ans--OnceA2perA2shift

HowA2oftenA2doA2youA2checkA2theA2HighA2LimitA2Switch?A2-A2Ans--Annually

AA22"A2pipeA2wasA2foundA2toA2beA2deliveringA2waterA2atA2100A2psiaA2atA21040ftA2perA2seco
nd.A2HowA2manyA2gallonsA2perA2hourA2willA2itA2deliver?A2-A2Ans--
GPM=A2VA2(diameterA2squared)A2dividedA2byA2.4085A2ANSWERA2pgA2469A2BOG

WhatA2controlsA2theA2amountA2ofA2blowbackA2onA2aA2safetyA2valve?A2-A2Ans--
BlowbackA2ringA2orA2adjustingA2ring

OnA2aA2openA2airA2expansionA2tankA2hotA2waterA2boilerA2system;A2howA2highA2shouldA2itA2
beA2mounted?A2-A2Ans--(4A2FeetA2)A2aboveA2theA2highestA2heatingA2element.

WhatA2isA2theA2minimumA2topA2clearanceA2ofA2boilersA2withA2manholes?A2-A2Ans--5A2feet

PackageA2boilers;A2steamA2heatingA2boilersA2andA2hotA2waterA2heatingA2boilersA2shallA2ha
veA2aA2minimumA2clearanceA2of?A2-A2Ans--
2A2feetA2fromA2ceiling.A2CodeA2chapterA210A2page76

MostA2importantA2safetyA2deviceA2onA2aA2boiler?A2-A2Ans--SafetyA2reliefA2valve

,WhatA2doesA2aA2BlackA2LiquorA2BoilerA2do?A2-A2Ans--
BlackA2LiquorA2isA2theA2byA2productA2ofA2woodA2pulpA2processingA2inA2theA2paperA2making
A2industry.


WhatA2doesA2BlackA2liquorA2boilerA2knownA2for?A2-A2Ans--
SteamA2generationA2andA2recoveryA2ofA2sodaA2ash

MaximumA2lineA2voltageA2forA2controlA2onA2aA2boiler?A2-A2Ans--150A2volts

UnderA2whatA2codeA2areA2boilersA2designedA2andA2constructed?A2-A2Ans--ASME-
A2CSDA21


HowA2manyA2lowA2waterA2cutA2offsA2areA2neededA2perA2codeA2forA2aA2hotA2waterA2systemA
2whenA2aA2boilerA2hasA2inputsA2greaterA2thanA2400,000A2btuA2perA2hrA2-A2Ans--
1A2LWCOA2isA2needed.

WhatA2isA2theA2minimumA2andA2maximumA2sizeA2forA2aA2safetyA2valveA2perA2codeA2forA2bo
ilers?A2-A2Ans--MinimumA23/4"A2andA2MaximumA24A21/2"

WhatA2stampA2isA2putA2onA2aA2boilerA2afterA2repairs?A2-A2Ans--"R"

WhatA2isA2theA2equalizingA2systemA2usedA2for?A2-A2Ans--
TheA2equalizingA2systemA2isA2forA2warmingA2upA2theA2steamA2lead.

AA2blowdownA2valveA2isA2locatedA2atA2theA2lowestA2waterA2spaceA2ofA2aA2boilerA2forA2three
A2purposesA2-A2Ans--1.A2toA2removeA2precipitatedA2sludgeA2orA2looseA2scaleA2\
n2.A2ToA2permitA2rapidA2loweringA2ofA2theA2boilerA2waterA2ifA2itA2hasA2becomeA2tooA2highA2
accidentallyA2\
n3.A2AsA2aA2meansA2ofA2removingA2waterA2fromA2theA2boilerA2soA2thatA2freshA2waterA2may
A2beA2addedA2toA2keepA2theA2concentrationA2ofA2solidsA2belowA2theA2pointA2whereA2difficult
iesA2mayA2beA2experienced.

InA2theA2oldA2powerA2boilerA2whichA2typeA2ofA2feed-waterA2regulatorsA2wereA2notA2used?
A2-A2Ans--Electronic


AfterA2openingA2aA2boilerA2forA2repairsA2howA2muchA2oxygenA2isA2needed?A2-A2Ans--19%

WhatA2isA2theA2firstA2thingA2youA2doA2whenA2shuttingA2downA2aA2boiler?A2-A2Ans--
TurnA2offA2(extinguishA2fire)

WhatA2isA2theA2legalA2limitA2ofA2acceptableA2asbestosA2particlesA2?A2-A2Ans--
0.1A2fibersA2perA2cubicA2centimeter

WhatA2isA2CREEP?A2-A2Ans--
CreepA2isA2definedA2asA2theA2slowA2deformationA2ofA2materialA2withA2time;A2withA2theA2def
ormationA2takingA2placeA2atA2elevatedA2temperaturesA2withA2noA2increaseA2inA2stress.

,WhatA2isA2theA2BTUA2contentA2ofA2AnthraciteA2coal?A2-A2Ans--14000A2btu/lb

WhatA2substanceA2transfersA2electricalA2currentA2inA2aA2photocell?A2-A2Ans--
ElectricityA2willA2flowA2whenA2theA2CADMIUMA2isA2exposedA2toA2sufficientA2light.

WhatA2deviceA2actsA2asA2aA2checkA2valveA2inA2bothA2directionsA2andA2keepsA2pumpsA2pri
med?A2-A2Ans--
FOOTA2VALVESA2areA2usedA2forA2pumpsA2underA2suctionA2pressureA2toA2preventA2backfl
owA2primed?A2onA2theA2suctionA2line.

WhatA2protectsA2boilersA2fromA2explosionA2inA2theA2furnace?A2-A2Ans--
AA2flameA2guardA2systemA2isA2anA2arrangementA2ofA2flameA2detectionA2system;A2interlock
s;A2andA2relaysA2whichA2willA2senseA2theA2presenceA2ofA2aA2properA2flameA2inA2aA2furnace
A2andA2causeA2fuelA2toA2beA2shutA2offA2toA2theA2furnaceA2ifA2aA2hazardousA2conditionA2dev
elopsA2(improperA2flameA2orA2combustion).

WhatA2sizeA2pipeA2isA2usedA2asA2aA2headerA2inA2aA2boilerA2operatingA2atA2100psi?A2-
A2Ans--6A2inches


WhatA2deviceA2isA2usedA2toA2measureA2flueA2gassesA2-A2Ans--TheA2OrsatA2Analyzer

WhichA2lowA2waterA2cutA2offA2doesA2notA2haveA2aA2mercuryA2switch?A2-A2Ans--
TheA2SubmergedA2electrodeA2type

WhatA2isA2theA2btuA2outputA2perA2lbA2ofA2#4A2fuelA2oil?A2-A2Ans--18

WhatA2substanceA2isA2usedA2forA2theA2electricA2transmissionA2inA2anA2RTD?A2-A2Ans--
PlatinumA2isA2usedA2becauseA2ofA2itsA2stabilityA2atA2highA2temperatures

HowA2muchA2airA2isA2neededA2forA2theA2combustionA2ofA2pulverizedA2coal;A2gas;A2oil?A2-
A2Ans--50%A2forA2coalA2andA210-30%A2forA2gasA2&A2oil


InA2oldA2powerA2boilersA2whichA2typeA2ofA2feedwaterA2regulatorsA2wereA2notA2used?A2\
n(A)A2hydraulicA2\n(B)A2floatA2\n(C)A2thermostaticA2expansionA2\n(D)A2electronicA2-A2Ans--
ANSWERA2DA2electronic/electro-magnetic

WhatA2isA2hardA2formingA2scale?A2-A2Ans--Silica

WithA2hydroxideA2presentA2andA2normalA2oxygenA2levelsA2whichA2chemicalA2willA2causeA2
problems?A2-A2Ans--Chlorine

TheA2resultA2fromA2steelA2manufacturingA2andA2underA2pressureA2inA2boilersA2tendsA2toA2c
auseA2buldging?A2AA2buldgeA2isA2causedA2byA2?A2-A2Ans--
AA2buldgeA2isA2causedA2byA2overheatingA2ofA2theA2shellA2platesA2andA2itA2affectsA2theA2enti
reA2thicknessA2ofA2theA2plate.

, AA2blisterA2isA2causedA2byA2whatA2?A2-A2Ans--
SlagA2inclusionA2formingA2aA2laminationA2atA2theA2timeA2theA2plateA2wasA2rolledA2atA2theA2s
teelA2mill.A2AA2blisterA2isA2aA2separationA2ofA2theA2metalA2fromA2theA2shellA2plateA2causedA2
byA2impuritiesA2rolledA2intoA2theA2shellA2plateA2whenA2formed.

WithA2normalA2oxygenA2andA2lowA2alkalinity.A2whatA2isA2addedA2toA2theA2boilerA2water?A2-
A2Ans--NeutralizingA2Amines


WhichA2chemicalA2isA2usedA2toA2combatA2scale?A2-A2Ans--
CombinedA2phosphateA2treatment-A2sodiumA2phosphate

OtherA2thanA2sulfiteA2whatA2chemicalA2isA2usedA2toA2combatA2corrosionA2inA2boilers?A2-
A2Ans--Hydrazine


WhatA2willA2neutralizeA2acid?A2-A2Ans--AlkaliA2andA2LimeA2Soda

WhatA2mechanicalA2deviceA2isA2usedA2toA2removeA2scaleA2fromA2firetubes?A2-A2Ans--
AA2tubeA2rattlerA2orA2vibrator

WhatA2percentageA2ofA2theA2pressureA2shouldA2aA2boilerA2haveA2beforeA2youA2testA2theA2l
everA2ofA2aA2safetyA2valve?A2-A2Ans--75%

WhereA2isA2internalA2corrosionA2mostA2likelyA2toA2occurA2onA2aA2verticalA2tubeA2boiler?A2-
A2Ans--WaterA2leg-MudA2leg


WhatA2areA2theA2minimumA2andA2maximumA2sizesA2permittedA2forA2blowA2downA2valvesA2
orA2connections?A2-A2Ans--3/4"minimumA22A2½A2"A2maximum

AA2boilerA2operatingA2atA2aA2pressureA2ofA265lbs.A2WhatA2isA2theA2smallestA2sizeA2feedA2an
dA2blowA2offA2connectionsA2ifA2theA2safetyA2valveA2isA2setA2atA290A2psi?A2-A2Ans--
½A2"A2feedA2¾A2"A2blowA2off

HowA2oftenA2shouldA2waterA2columnsA2andA2waterA2glassA2levelsA2beA2checkedA2onA2aA2hi
ghA2pressureA2boiler?A2-A2Ans--(OnceA2AA2Shift)\nAtA2theA2beginningA2ofA2eachA2shiftA2-
A2beginningA2ofA2theA2workA2effort


WhatA2takesA2noA2actualA2actionA2chemicalA2partA2inA2combustion?A2-A2Ans--Nitrogen

HowA2manyA2ppmA2ofA2EDTAA2areA2neededA2toA2tieA2upA21ppmA2ofA2hardness?A2-A2Ans--
EDTAA2requiresA210ppmA2ofA2EDTAA2andA25A2NTAA2toA2tieA2upA2eachA21ppmA2hardness.

OnA2aA2packageA2boiler;A2howA2manyA2waysA2couldA2causeA2fireA2puffsA2whenA2itA2isA2star
tedA2up?A2-A2Ans--6A2waysA21-poorA2startingA2draftA22-incorrectA2fireboxA23-
wrongA2burnerA2nozzleA24-leanA2fireA25-
A2insufficientA2gasA2pilotA2orA2excessiveA2gasA2pilotA26-waterA2inA2theA2oil