STATIONARY ENGINEERING EXAM STUDY
GUIDE 2026 PRACTICE QUESTIONS WITH FULL
SOLUTION GRADED A+
◉ All impurities are in one of four states Answer: they are ________;
__________; _________; and _________.
◉ The capacity of a substance to combine with another substance is
its _____________. Answer: Valence
◉ Calcium and Magnesium bicarbonate produce ___________ hardness.
Answer: temporary
◉ Scale that is soft and muddy simular to magnesium carbonate
is___________________. Answer: calcium carbonate
◉ In order to prevent corrosion Answer: boiler water pH is
maintained between ________________.
◉ __________ _________ is used to internally remove oxygen from the
boiler. Answer: sodium sulfite
,◉ In order to remove one pound of oxygen Answer: it takes ________
lbs of sodium sulfate.
◉ __________ are added to the boiler to prevent steam line and
condensate line corrosion. These chemicals are used because they
will blow off with the steam. Answer: amines
◉ When boiler water has high levels of solids; steam bubbles can be
trapped below the water line causing water level fluctuations known
as __________. Answer: Foaming
◉ ___________ is when water impurities leave the boiler with the
steam. Answer: carryover
◉ The loss of metal that forms smooth Answer: rolling contour as a
result of an acid attack is called __________.
◉ __________ blowdown lowers the TDS level in the boiler. Answer:
surface
◉ The electrolytic flow between dissimilar metals in a waterborne
environment which results in localized corrosion is known as
_____________. Answer: galvanic action
,◉ 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
GUIDE 2026 PRACTICE QUESTIONS WITH FULL
SOLUTION GRADED A+
◉ All impurities are in one of four states Answer: they are ________;
__________; _________; and _________.
◉ The capacity of a substance to combine with another substance is
its _____________. Answer: Valence
◉ Calcium and Magnesium bicarbonate produce ___________ hardness.
Answer: temporary
◉ Scale that is soft and muddy simular to magnesium carbonate
is___________________. Answer: calcium carbonate
◉ In order to prevent corrosion Answer: boiler water pH is
maintained between ________________.
◉ __________ _________ is used to internally remove oxygen from the
boiler. Answer: sodium sulfite
,◉ In order to remove one pound of oxygen Answer: it takes ________
lbs of sodium sulfate.
◉ __________ are added to the boiler to prevent steam line and
condensate line corrosion. These chemicals are used because they
will blow off with the steam. Answer: amines
◉ When boiler water has high levels of solids; steam bubbles can be
trapped below the water line causing water level fluctuations known
as __________. Answer: Foaming
◉ ___________ is when water impurities leave the boiler with the
steam. Answer: carryover
◉ The loss of metal that forms smooth Answer: rolling contour as a
result of an acid attack is called __________.
◉ __________ blowdown lowers the TDS level in the boiler. Answer:
surface
◉ The electrolytic flow between dissimilar metals in a waterborne
environment which results in localized corrosion is known as
_____________. Answer: galvanic action
,◉ 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
