STATIONARY ENGINEER EXAM 2026
What are two types of commonly used feed water pumps - ANSWER-Injectors
and Inspirator
What is blistering caused by? - ANSWER-A Slag Inclusion forming a
lamination at time the plate was rolled in the steel mill and it is actually a
separation of the metal from the shell plate; caused by impurities rolled into the
shell plate when formed
Grooving is a form of deterioration of boiler plate by a combination of
________ and ______________. - ANSWER-localized corrosion ; stress
concentration
What compound is not a heat producer? - ANSWER-Nitrogen
How many types of flame detectors are there? - ANSWER-6 Types
On a package boiler; how many ways could cause fire puffs when it is starting
up? - ANSWER-6 ways
Air is _____% oxygen by weight & ______% by volume. - ANSWER-Air is
23% oxygen by weight & 21% by volume.
The hardgrove index is a measurement of___________. - ANSWER-
Grindability
How many pounds of oxygen are required to properly burn 1 pound of
methane? - ANSWER-4 lbs of oxygen
,How much excess air is required to burn coal? - ANSWER-50%
How much air is required to correctly atomize #4 fuel oil and lighter fuel? -
ANSWER-20 psi for #4 and lighter fuel 10 psi
ANSWER-Once a shift
In a 24hr operation; how often should you check the boiler water level? -
ANSWER-Once a shift
How often is it recommended to check the low water cut off (LWCO)? -
ANSWER-Once a shift
How often should you check the high limit switch? - ANSWER-Annually
How often should the testing and inspecting of boiler components be done? -
ANSWER-Semi annually
How often should you test an operating control? - ANSWER-Annually
How often should you test water columns and water glass level be checked on a
high Pressure boiler? - ANSWER-At the beginning of every shift/ beginning of
work efforts
How often do you test your float controls on a high-pressure boiler? -
ANSWER-Every shift
How often do you test your float controls on a hot water boiler? - ANSWER-
Weekly
,How often do you test a safety valve with pressure? - ANSWER-Annually
How often do you test a safety valve with a lever test? - ANSWER-Monthly
What controls blowback on a safety valve? - ANSWER-The blowback ring or
adjusting ring
What is the most important safety device on a boiler? - ANSWER-Relief valve
The_______ _______ or______ _______ _______ sense heat to prove flame in
a boiler. - ANSWER-Stack switch - rectifying flame rod
Rectifying phototubes and cadmium sulfide phototube both prove flame in the
boiler by sensing __________ ________. - ANSWER-Visible light
The chief heat producing elements in fuels are_____; ______ and__________. -
ANSWER-carbon hydrogen sulfer
The presence of _________ in flue gas is an indication of incomplete
combustion. - ANSWER-Carbon monoxide
The EPA limits the amount of particulate emission to ________ pounds per 1
000 000 btu's input. - ANSWER-.10
When NOx combines with organic gases ________ is produced. - ANSWER-
Ozone
Anthracite coal is very hard and has a high percentage of fixed________ and a
heating value of ________btu's per pound. - ANSWER-fixed carbon - 14000
, __________ is the lowest grade of coal; has a claylike appearance and a heating
value range of _______ to _______btu's per lb. - ANSWER-Lignate 7000 to
11000 btu's per lb
Spreader and chain grate stokers are types of ___________ stokers - ANSWER-
over feed
#2 fuel oil is classified as _________ domestic fuel oil. - ANSWER-medium
#6 fuel oil is also known as?? - ANSWER-Bunker C
#4 fuel oil has about________ btu's per lb. - ANSWER-18
Which fuels require heaing prior to being sprayed into a furnace? - ANSWER-
4;5;6
As the temperature of a fuel oil rises; the visosity goes_____. - ANSWER-
Down
What burner can burn almost any fuel at any temperature?? - ANSWER-steam
atomizing
Steam atomization typically consumes about ____ percent of the steam
produced by the boiler. - ANSWER-2%
An air atomizing burner requires______psi air pressure above the oil pressure
when burning heavy oil. - ANSWER-20
What are two types of commonly used feed water pumps - ANSWER-Injectors
and Inspirator
What is blistering caused by? - ANSWER-A Slag Inclusion forming a
lamination at time the plate was rolled in the steel mill and it is actually a
separation of the metal from the shell plate; caused by impurities rolled into the
shell plate when formed
Grooving is a form of deterioration of boiler plate by a combination of
________ and ______________. - ANSWER-localized corrosion ; stress
concentration
What compound is not a heat producer? - ANSWER-Nitrogen
How many types of flame detectors are there? - ANSWER-6 Types
On a package boiler; how many ways could cause fire puffs when it is starting
up? - ANSWER-6 ways
Air is _____% oxygen by weight & ______% by volume. - ANSWER-Air is
23% oxygen by weight & 21% by volume.
The hardgrove index is a measurement of___________. - ANSWER-
Grindability
How many pounds of oxygen are required to properly burn 1 pound of
methane? - ANSWER-4 lbs of oxygen
,How much excess air is required to burn coal? - ANSWER-50%
How much air is required to correctly atomize #4 fuel oil and lighter fuel? -
ANSWER-20 psi for #4 and lighter fuel 10 psi
ANSWER-Once a shift
In a 24hr operation; how often should you check the boiler water level? -
ANSWER-Once a shift
How often is it recommended to check the low water cut off (LWCO)? -
ANSWER-Once a shift
How often should you check the high limit switch? - ANSWER-Annually
How often should the testing and inspecting of boiler components be done? -
ANSWER-Semi annually
How often should you test an operating control? - ANSWER-Annually
How often should you test water columns and water glass level be checked on a
high Pressure boiler? - ANSWER-At the beginning of every shift/ beginning of
work efforts
How often do you test your float controls on a high-pressure boiler? -
ANSWER-Every shift
How often do you test your float controls on a hot water boiler? - ANSWER-
Weekly
,How often do you test a safety valve with pressure? - ANSWER-Annually
How often do you test a safety valve with a lever test? - ANSWER-Monthly
What controls blowback on a safety valve? - ANSWER-The blowback ring or
adjusting ring
What is the most important safety device on a boiler? - ANSWER-Relief valve
The_______ _______ or______ _______ _______ sense heat to prove flame in
a boiler. - ANSWER-Stack switch - rectifying flame rod
Rectifying phototubes and cadmium sulfide phototube both prove flame in the
boiler by sensing __________ ________. - ANSWER-Visible light
The chief heat producing elements in fuels are_____; ______ and__________. -
ANSWER-carbon hydrogen sulfer
The presence of _________ in flue gas is an indication of incomplete
combustion. - ANSWER-Carbon monoxide
The EPA limits the amount of particulate emission to ________ pounds per 1
000 000 btu's input. - ANSWER-.10
When NOx combines with organic gases ________ is produced. - ANSWER-
Ozone
Anthracite coal is very hard and has a high percentage of fixed________ and a
heating value of ________btu's per pound. - ANSWER-fixed carbon - 14000
, __________ is the lowest grade of coal; has a claylike appearance and a heating
value range of _______ to _______btu's per lb. - ANSWER-Lignate 7000 to
11000 btu's per lb
Spreader and chain grate stokers are types of ___________ stokers - ANSWER-
over feed
#2 fuel oil is classified as _________ domestic fuel oil. - ANSWER-medium
#6 fuel oil is also known as?? - ANSWER-Bunker C
#4 fuel oil has about________ btu's per lb. - ANSWER-18
Which fuels require heaing prior to being sprayed into a furnace? - ANSWER-
4;5;6
As the temperature of a fuel oil rises; the visosity goes_____. - ANSWER-
Down
What burner can burn almost any fuel at any temperature?? - ANSWER-steam
atomizing
Steam atomization typically consumes about ____ percent of the steam
produced by the boiler. - ANSWER-2%
An air atomizing burner requires______psi air pressure above the oil pressure
when burning heavy oil. - ANSWER-20
