BOILER OPERATOR LICENSING
EXAM QUESTIONS WITH ANSWERS
1YorYmoreYsafetyYvalvesY-YCORRECTYANSWERS-allYsteamYboilersYmustYhave
LockedYclosedY-YCORRECTYANSWERS-
beforeYanyoneYentersYtheYboilerYdrum,YtheYmainYsteamYstopYvalve,YbottomYblowdownYvalves,Y&Yfe
edwaterYvalvesYshouldYbe
212YdegreesYFY-YCORRECTYANSWERS-
atYatmosphericYpressure,YwaterYbeginsYtoYboilYatYapproximately
FuelYoil,Ygas,Y&YcoalY-YCORRECTYANSWERS-fuelsYmostYcommonlyYusedYinYboilers
SteamYpressureYgaugeY-YCORRECTYANSWERS-
mustYbeYconnectedYtoYtheYhighestYpartYofYtheYsteamYsideYofYtheYboiler
HalfYfullY-YCORRECTYANSWERS-withYanYNOWLYinYaYboiler,YtheYgaugeYglassYisYapproximately
FoamingY-YCORRECTYANSWERS-aYhighYsurfaceYtensionYonYtopYofYtheYboilerYwaterYcanYleadYto
MudYdrumY-YCORRECTYANSWERS-
BottomYblowdownYonYaYboilerYremovesYsludgeY&YsedimentYfromYthe
TinY-YCORRECTYANSWERS-aYboilerYfusibleYplugYisYbrassYorYbronzeYwithYaYcoreYof
PoundsYperYsquareYinchY-YCORRECTYANSWERS-aYsteamYpressureYgaugeYisYcalibratedYin
, TryYcocksY-YCORRECTYANSWERS-aYsecondaryYmeansYofYdeterminingYboilerYwaterYlevel
OilyYwasteYragYstorageY-YCORRECTYANSWERS-
firesYcausedYbyYspontaneousYcombustionYareYmostYlikelyYtoYoccurYinYthe
SteamY-YCORRECTYANSWERS-
aYsiphonYinstalledYbetweenYtheYboilerY&YtheYpressureYgaugeYprotectsYtheYBourdonYtubeYfrom
PreventYformationYofYscaleY-YCORRECTYANSWERS-boilerYfeedwaterYisYchemicallyYtreatedYto
InsideYtubeYsurfaceY-YCORRECTYANSWERS-inYaYfiretubeYboiler,YsootYaccumulatesYonYthe
1.5YtimesYtheYMAWPY-YCORRECTYANSWERS-
theYpressureYappliedYonYtheYboilerYduringYaYhydrostaticYtestYshouldYbe
DecreasedY-YCORRECTYANSWERS-asYfuelYoilYisYheated,YitsYviscosityYis
ChimneyY-YCORRECTYANSWERS-theYinducedYdraftYfanYisYlocatedYbetweenYtheYboilerY&Ythe
FlashYwhenYexposedYtoYanYopenYflameY-YCORRECTYANSWERS-
theYflashYpointYofYfuelYoilYisYtheYminimumYtemperatureYatYwhichYtheYfuelYwill
BurnYcontinuallyY-YCORRECTYANSWERS-
theYfireYpointYofYfuelYoilYisYtheYminimumYtemperatureYatYwhichYtheYfuelYwill
Lowest;YflowY-YCORRECTYANSWERS-
theYpourYpointYofYfuelYoilYisYtheY____YtemperatureYatYwhichYfuelYoilYwillY____
EXAM QUESTIONS WITH ANSWERS
1YorYmoreYsafetyYvalvesY-YCORRECTYANSWERS-allYsteamYboilersYmustYhave
LockedYclosedY-YCORRECTYANSWERS-
beforeYanyoneYentersYtheYboilerYdrum,YtheYmainYsteamYstopYvalve,YbottomYblowdownYvalves,Y&Yfe
edwaterYvalvesYshouldYbe
212YdegreesYFY-YCORRECTYANSWERS-
atYatmosphericYpressure,YwaterYbeginsYtoYboilYatYapproximately
FuelYoil,Ygas,Y&YcoalY-YCORRECTYANSWERS-fuelsYmostYcommonlyYusedYinYboilers
SteamYpressureYgaugeY-YCORRECTYANSWERS-
mustYbeYconnectedYtoYtheYhighestYpartYofYtheYsteamYsideYofYtheYboiler
HalfYfullY-YCORRECTYANSWERS-withYanYNOWLYinYaYboiler,YtheYgaugeYglassYisYapproximately
FoamingY-YCORRECTYANSWERS-aYhighYsurfaceYtensionYonYtopYofYtheYboilerYwaterYcanYleadYto
MudYdrumY-YCORRECTYANSWERS-
BottomYblowdownYonYaYboilerYremovesYsludgeY&YsedimentYfromYthe
TinY-YCORRECTYANSWERS-aYboilerYfusibleYplugYisYbrassYorYbronzeYwithYaYcoreYof
PoundsYperYsquareYinchY-YCORRECTYANSWERS-aYsteamYpressureYgaugeYisYcalibratedYin
, TryYcocksY-YCORRECTYANSWERS-aYsecondaryYmeansYofYdeterminingYboilerYwaterYlevel
OilyYwasteYragYstorageY-YCORRECTYANSWERS-
firesYcausedYbyYspontaneousYcombustionYareYmostYlikelyYtoYoccurYinYthe
SteamY-YCORRECTYANSWERS-
aYsiphonYinstalledYbetweenYtheYboilerY&YtheYpressureYgaugeYprotectsYtheYBourdonYtubeYfrom
PreventYformationYofYscaleY-YCORRECTYANSWERS-boilerYfeedwaterYisYchemicallyYtreatedYto
InsideYtubeYsurfaceY-YCORRECTYANSWERS-inYaYfiretubeYboiler,YsootYaccumulatesYonYthe
1.5YtimesYtheYMAWPY-YCORRECTYANSWERS-
theYpressureYappliedYonYtheYboilerYduringYaYhydrostaticYtestYshouldYbe
DecreasedY-YCORRECTYANSWERS-asYfuelYoilYisYheated,YitsYviscosityYis
ChimneyY-YCORRECTYANSWERS-theYinducedYdraftYfanYisYlocatedYbetweenYtheYboilerY&Ythe
FlashYwhenYexposedYtoYanYopenYflameY-YCORRECTYANSWERS-
theYflashYpointYofYfuelYoilYisYtheYminimumYtemperatureYatYwhichYtheYfuelYwill
BurnYcontinuallyY-YCORRECTYANSWERS-
theYfireYpointYofYfuelYoilYisYtheYminimumYtemperatureYatYwhichYtheYfuelYwill
Lowest;YflowY-YCORRECTYANSWERS-
theYpourYpointYofYfuelYoilYisYtheY____YtemperatureYatYwhichYfuelYoilYwillY____