MN BOILER OPERATOR EXAM PREP 1A + CHIEF QUESTIONS AND CORRECT ANSWERS

MN BOILER OPERATOR EXAM PREP 1A +
CHIEF QUESTIONS AND CORRECT
ANSWERS
WhatA2isA2meantA2byA2A.S.M.E.?A2-A2Ans--
AmericanA2SocietyA2ofA2MechanicalA2Engineers

InA2theA2eventA2aA2boilerA2wouldA2explode,A2overheatA2dueA2toA2aA2lowA2waterA2condition,A
2orA2aA2furnaceA2explosion,A2etc.A2andA2beforeA2repairsA2areA2madeA2orA2theA2boilerA2isA2a
ttemptedA2toA2beA2returnedA2toA2service,A2whoA2shouldA2beA2notified?A2-A2Ans--
CodeA2AdministrationA2andA2InspectionA2ServicesA2(BoilerA2Inspection)

AA2steamA2flowA2meterA2measures?A2-A2Ans--quantityA2ofA2steam

WhyA2areA2waterA2tubeA2boilersA2consideredA2lessA2dangerousA2thanA2fireA2tubeA2boilers?
A2-A2Ans--containA2lessA2water


WhatA2isA2theA2purposeA2ofA2floodingA2aA2super-heaterA2onA2startA2up?A2-A2Ans--
preventA2dryA2firingA2ofA2theA2super-heater

WhatA2isA2theA2purposeA2ofA2de-superheating?A2-A2Ans--controlA2temperatureA2ofA2steam

AnA2economizerA2isA2aA2heat-exchangerA2locatedA2inA2theA2-A2Ans--
gasA2passageA2betweenA2theA2boilerA2andA2theA2stack

OnA2someA2hotA2waterA2boilersA2aA2three-
wayA2mixingA2valveA2isA2used.A2WhatA2isA2itsA2purpose?A2-A2Ans--
controlsA2temperatureA2ofA2waterA2circulatingA2inA2heatingA2system

AA2hotA2waterA2boilerA2isA2consideredA2toA2beA2aA2highA2pressureA2boilerA2whenA2it:A2-
A2Ans--exceedsA2250A2degreesA2and/orA2160A2psi


IfA2itA2isA2necessaryA2toA2testA2theA2relievingA2capacityA2ofA2aA2safetyA2valve:A2-A2Ans--
anA2accumulationA2testA2isA2putA2onA2boiler

TheA2switchA2thatA2provesA2combustionA2airA2andA2isA2foundA2inA2theA2windboxA2enteringA
2theA2furnaceA2isA2-A2Ans--airA2switchA2(sail)A2switch


AnA2indicationA2ofA2boilerA2efficiencyA2isA2obtainedA2fromA2-A2Ans--
temperatureA2ofA2exitA2gases

AsA2theA2pressureA2ofA2steamA2isA2increased,A2theA2volumeA2isA2-A2Ans--decreased

, BeforeA2startingA2aA2fire,A2whenA2firingA2withA2oil,A2pulverizedA2fuel,A2orA2gas,A2whatA2prec
autionA2mustA2beA2takenA2withA2aA2furnace?A2-A2Ans--
purgeA2allA2unburnedA2gasesA2ofA2theA2boiler

AA2steamA2gaugeA2dialA2mustA2beA2graduatedA2toA2atA2leastA2whatA2percentA2ofA2theA2safe
A2workingA2pressureA2ofA2theA2boiler?A2-A2Ans--150%


AssumingA2allA2componentsA2inA2aA2hydronicA2systemA2areA2working,A2whatA2wouldA2beA2t
heA2mainA2reasonA2beA2forA2noA2heat?A2-A2Ans--airA2inA2theA2system

WhatA2isA2aA2highA2temperatureA2waterA2boiler?A2-A2Ans--
waterA2boilerA2operatingA2overA2160A2psiA2and/orA2250A2degreesA2Fahrenheit

WhatA2boilerA2attachmentA2isA2usedA2toA2increaseA2theA2steamA2temperatureA2aboveA2the
A2temperatureA2ofA2theA2waterA2fromA2whichA2itA2isA2evaporated?A2-A2Ans--superheater


AsA2theA2pressureA2increases,A2theA2densityA2ofA2theA2steamA2-A2Ans--increases

WhenA2stopA2valvesA2overA22A2inchesA2inA2diameterA2areA2usedA2onA2aA2boiler,A2theyA2sha
llA2beA2-A2Ans--risingA2stem

HowA2canA2vaporizationA2ofA2theA2feedA2waterA2fromA2anA2openA2feedA2waterA2heaterA2toA2
theA2pumpA2beA2eliminated?A2-A2Ans--
increaseA2theA2suctionA2headA2byA2eitherA2raisingA2theA2feedA2waterA2heaterA2orA2lowering
A2theA2pump


WhenA2aA2boilerA2isA2beingA2putA2on-
line,A2theA2steamA2pressureA2onA2theA2incomingA2boilerA2shouldA2beA2-A2Ans--
slightlyA2lowerA2thanA2theA2lineA2pressure

AfterA2aA2liquidA2boilerA2hasA2beenA2inspected,A2andA2isA2thenA2refilledA2withA2liquid,A2what
A2mustA2beA2doneA2beforeA2thisA2liquidA2boilerA2canA2beA2restoredA2toA2normalA2service?
A2-A2Ans--airA2mustA2beA2evacuatedA2fromA2theA2system


WhatA2doesA2highA2carbonA2monoxideA2(CO)A2inA2theA2flueA2gassesA2indicate?A2-A2Ans--
combustionA2isA2incomplete

TheA2readingA2ofA2theA2draftA2gaugeA2isA2referredA2toA2asA2-A2Ans--inchesA2ofA2water

ElectrostaticA2precipitatorsA2areA2effectiveA2inA2removingA2-A2Ans--
smallA2dustA2particlesA2fromA2theA2gases

SteamA2impingingA2onA2boilerA2tubesA2wouldA2-A2Ans--
cutA2throughA2theA2boilerA2tubesA2inA2aA2veryA2shortA2periodA2ofA2time