LA STEAM ENGINEER EXAM STUDY GUIDE | QUESTIONS AND
ANSWERS | VERIFIED AND WELL DETAILED ANSWERS | EXAM
ALREADY GRADED A+ | LATEST EXAM VERSION
Superheater fire side deposits - CORRECT 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 - CORRECT 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 - CORRECT 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 - CORRECT ANSWER -
Protected from the etching action of steam by polyethylene, asbestos, sheet mica,
or graphite.
Use of preheated combustion air - CORRECT ANSWER - Speeds up
combustion, improves combustion at low loads, increases efficiency, or all of the
above.
Continuous blowdown - CORRECT 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 - CORRECT 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 - CORRECT ANSWER - Occurs by conduction,
convection, and radiation.
Vibration and overheating of a centrifugal boiler feed pump - CORRECT
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 - CORRECT 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 - CORRECT 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 - CORRECT 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.
Soft sludge in the waterside of a boiler - CORRECT ANSWER - Can be readily
produced by metal oxides, neutral water, dissolved oxygen, or insoluble salts.
, Potential hazard of an automatically fired boiler with the fire out - CORRECT
ANSWER - Includes over pressurizing and dry firing, spalling damage to the
brickwork, severe furnace explosion, or heat damage to the atomizer.
Initial valve opening in a huddling chamber type safety valve - CORRECT
ANSWER - Is caused by static pressure acting on the compression screw, steam
pressure acting on the compression screw, steam flow passing through the
calibrated adjusting ring, or steam pressure acting on the bottom area of the valve
disc.
Furnace refractory spalling in a boiler - CORRECT ANSWER - Is caused by
thermal shock due to faulty atomization, rapid uneven heating, high combustion
rate, or high furnace pressure.
Distinction between safety valves and relief valves - CORRECT ANSWER -
Safety valves do not open automatically, do not provide full pressure relief, pop
open instantly, and first open slightly at a specified pressure.
Super heater safety valve - CORRECT ANSWER - Is set to release before the
drum safety to ensure flow through the super heater, prevent excessive superheater
pressure, protect the drum, and prevent upset when drum safety pops.
Frequent replacement of flange gasket on steam line - CORRECT ANSWER -
May be due to excess priming of the boiler, too high steam pressure, settlement of
the steam header or one of the supports for the boiler, or too high firing rate.
Try ***** on the boiler water column showing steam - CORRECT ANSWER -
When the glass is half full of water, you should immediately install a new gauge
ANSWERS | VERIFIED AND WELL DETAILED ANSWERS | EXAM
ALREADY GRADED A+ | LATEST EXAM VERSION
Superheater fire side deposits - CORRECT 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 - CORRECT 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 - CORRECT 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 - CORRECT ANSWER -
Protected from the etching action of steam by polyethylene, asbestos, sheet mica,
or graphite.
Use of preheated combustion air - CORRECT ANSWER - Speeds up
combustion, improves combustion at low loads, increases efficiency, or all of the
above.
Continuous blowdown - CORRECT 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 - CORRECT 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 - CORRECT ANSWER - Occurs by conduction,
convection, and radiation.
Vibration and overheating of a centrifugal boiler feed pump - CORRECT
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 - CORRECT 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 - CORRECT 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 - CORRECT 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.
Soft sludge in the waterside of a boiler - CORRECT ANSWER - Can be readily
produced by metal oxides, neutral water, dissolved oxygen, or insoluble salts.
, Potential hazard of an automatically fired boiler with the fire out - CORRECT
ANSWER - Includes over pressurizing and dry firing, spalling damage to the
brickwork, severe furnace explosion, or heat damage to the atomizer.
Initial valve opening in a huddling chamber type safety valve - CORRECT
ANSWER - Is caused by static pressure acting on the compression screw, steam
pressure acting on the compression screw, steam flow passing through the
calibrated adjusting ring, or steam pressure acting on the bottom area of the valve
disc.
Furnace refractory spalling in a boiler - CORRECT ANSWER - Is caused by
thermal shock due to faulty atomization, rapid uneven heating, high combustion
rate, or high furnace pressure.
Distinction between safety valves and relief valves - CORRECT ANSWER -
Safety valves do not open automatically, do not provide full pressure relief, pop
open instantly, and first open slightly at a specified pressure.
Super heater safety valve - CORRECT ANSWER - Is set to release before the
drum safety to ensure flow through the super heater, prevent excessive superheater
pressure, protect the drum, and prevent upset when drum safety pops.
Frequent replacement of flange gasket on steam line - CORRECT ANSWER -
May be due to excess priming of the boiler, too high steam pressure, settlement of
the steam header or one of the supports for the boiler, or too high firing rate.
Try ***** on the boiler water column showing steam - CORRECT ANSWER -
When the glass is half full of water, you should immediately install a new gauge
