LA STEAM ENGINEER EXAM STUDY GUIDE QUESTIONS AND ANSWERS
ALL VERIFIED BY AN EXPECT A+ GRADED
Superheater fire side deposits -
Answer--Would most likely lead to lower fuel consumption, lower stack temperature,
higher steam outlet pressure, and lower steam outlet temperature.
Automatically fired packaged boiler lockout causes -
Answer--Can be caused by excessive fuel pressure, an insensitive combustion control
element, too much delay for ignition, or not enough air for combustion.
Draft system under pressure above atmospheric -
Answer--When air or the products of combustion are caused to flow to or through a unit
by maintaining them at a pressure above atmospheric, the draft system is said to be
under induced draft, forced draft, balanced draft, or both forced and induced draft.
Protection of waterside of flat-glass boiler gauge glass -
Answer--Protected from the etching action of steam by polyethylene, asbestos, sheet
mica, or graphite.
Use of preheated combustion air -
Answer--Speeds up combustion, improves combustion at low loads, increases efficiency,
or all of the above.
Continuous blowdown -
Answer--Is necessary on high make up boilers to conserve heat in the blowdown,
maintain correct water level, maintain proper dissolved boiler water solids, and
keep blowdown line from plugging.
Steam separation -
Answer--Is less effective when there is excessive steam temp, low boiler water alkalinity,
high steam drum pressure, or high water level in drum.
Heat transfer in a boiler -
Answer--Occurs by conduction, convection, and radiation.
Vibration and overheating of a centrifugal boiler feed pump -
Answer--Is probably due to excessive pressure in the boiler, obstruction in the suction
line, excessive feed water temperature, or corrosion on the inlet.
Too much water in a boiler -
Answer--Can cause the steam pressure to rise, the boiler pop valve to open at frequent
intervals, the boiler to foam, or the boiler to prime.
Dry pipe in a boiler -
Answer--Is for the purpose of removing sludge, maintaining proper water level, improving
the quality of the steam, and measuring steam enthalpy.
, Stuck safety valve on a boiler -
Answer--Should be addressed by lifting the valve lifting mechanism a number of times to
loosen the valve spindle, reducing the fire and maintaining the water level near the
center of the gauge glass, driving the valve spindle back to a close position, or gagging
the safety valve.
ALL VERIFIED BY AN EXPECT A+ GRADED
Superheater fire side deposits -
Answer--Would most likely lead to lower fuel consumption, lower stack temperature,
higher steam outlet pressure, and lower steam outlet temperature.
Automatically fired packaged boiler lockout causes -
Answer--Can be caused by excessive fuel pressure, an insensitive combustion control
element, too much delay for ignition, or not enough air for combustion.
Draft system under pressure above atmospheric -
Answer--When air or the products of combustion are caused to flow to or through a unit
by maintaining them at a pressure above atmospheric, the draft system is said to be
under induced draft, forced draft, balanced draft, or both forced and induced draft.
Protection of waterside of flat-glass boiler gauge glass -
Answer--Protected from the etching action of steam by polyethylene, asbestos, sheet
mica, or graphite.
Use of preheated combustion air -
Answer--Speeds up combustion, improves combustion at low loads, increases efficiency,
or all of the above.
Continuous blowdown -
Answer--Is necessary on high make up boilers to conserve heat in the blowdown,
maintain correct water level, maintain proper dissolved boiler water solids, and
keep blowdown line from plugging.
Steam separation -
Answer--Is less effective when there is excessive steam temp, low boiler water alkalinity,
high steam drum pressure, or high water level in drum.
Heat transfer in a boiler -
Answer--Occurs by conduction, convection, and radiation.
Vibration and overheating of a centrifugal boiler feed pump -
Answer--Is probably due to excessive pressure in the boiler, obstruction in the suction
line, excessive feed water temperature, or corrosion on the inlet.
Too much water in a boiler -
Answer--Can cause the steam pressure to rise, the boiler pop valve to open at frequent
intervals, the boiler to foam, or the boiler to prime.
Dry pipe in a boiler -
Answer--Is for the purpose of removing sludge, maintaining proper water level, improving
the quality of the steam, and measuring steam enthalpy.
, Stuck safety valve on a boiler -
Answer--Should be addressed by lifting the valve lifting mechanism a number of times to
loosen the valve spindle, reducing the fire and maintaining the water level near the
center of the gauge glass, driving the valve spindle back to a close position, or gagging
the safety valve.
