LA STEAM ENGINEER LICENSE
EXAM
If the boiler feedwater pump is operating and the boiler feedwater is
not rising, what is the best thing to do? Can you increase the speed of
the feedwater pump for more water volume? - ANSWERS-One of the
options available is to decrease firing rate of the boiler and see if the
water level stabilizes. Another option is to bring the second pump on
line.If these two options do not remedy the situation and the boiler
water level cannot be maintained, the boiler must be secured.We
cannot increase speed of the feedwater pump.
What is the boiler water pH? What pH reading is considered acidic or
alkaline? Give an example. - ANSWERS-pH of the boiler water
should be in the range between 9.0 and 11.0.Power of hydrogen (pH)
has the range from 1 to 14, the middle point 7 is neutral, below 7 is
water has acidic properties, and above 7 water is alkaline.
What is a superheater? What is the purpose of superheating steam?
Does a superheater requirea safety valve? Are there any precautions to
be taken when bringing a superheater on line? - ANSWERS-A
superheater is a nest of tubes inside a boiler used to increase
temperature of the steam leaving the boiler to avoid condensate in the
steam line and to increase efficiency of the load (steam turbine, steam
engine, etc.)
Superheater must be equipped with a safety valve.Flow of steam must
be provided through the superheater at all times, that is why
, superheater drain must be open at the start up and kept open until the
boiler is on line.
What causes boiler tubes to overheat and fail? - ANSWERS-Scale
formation on waterside of the tubes causes overheating and failure.
How do you prevent corrosion or pitting? What effect has oxygen or
carbon dioxide on metals? - ANSWERS-Corrosion is prevented by
removing oxygen and other gases by preheating the boiler feedwater,
adding oxygenscavenging chemical sulfite and keeping boiler water
pH above 9.0 (prevents from acid corrosion).Oxygen causes pitting of
boiler metal and carbon dioxide forms a carbonic acid that can cause
acidic corrosion.
How long can an operating boiler be left unattended? - ANSWERS-10
minutes
If a boiler was very low on water and showed signs of
overheating,should you fill it withwater to cool it down? -
ANSWERS-Absolutely not. It might cause an explosion or at least
thermal shock to the boiler metal.
What are the precautions to be observed when starting any boiler that
has been closed dow overnight? Are there any special precautions
required starting a gas burning boiler? - ANSWERS-Make a physical
observation of the boiler and its systems, walk around the boilerto
check for any abnormal conditions such as flammable material at the
dampers, fuel leaks,damaged electrical conduits, etc. Check all boiler
systems (feedwater, fuel, etc). Very important issue in starting a gas
EXAM
If the boiler feedwater pump is operating and the boiler feedwater is
not rising, what is the best thing to do? Can you increase the speed of
the feedwater pump for more water volume? - ANSWERS-One of the
options available is to decrease firing rate of the boiler and see if the
water level stabilizes. Another option is to bring the second pump on
line.If these two options do not remedy the situation and the boiler
water level cannot be maintained, the boiler must be secured.We
cannot increase speed of the feedwater pump.
What is the boiler water pH? What pH reading is considered acidic or
alkaline? Give an example. - ANSWERS-pH of the boiler water
should be in the range between 9.0 and 11.0.Power of hydrogen (pH)
has the range from 1 to 14, the middle point 7 is neutral, below 7 is
water has acidic properties, and above 7 water is alkaline.
What is a superheater? What is the purpose of superheating steam?
Does a superheater requirea safety valve? Are there any precautions to
be taken when bringing a superheater on line? - ANSWERS-A
superheater is a nest of tubes inside a boiler used to increase
temperature of the steam leaving the boiler to avoid condensate in the
steam line and to increase efficiency of the load (steam turbine, steam
engine, etc.)
Superheater must be equipped with a safety valve.Flow of steam must
be provided through the superheater at all times, that is why
, superheater drain must be open at the start up and kept open until the
boiler is on line.
What causes boiler tubes to overheat and fail? - ANSWERS-Scale
formation on waterside of the tubes causes overheating and failure.
How do you prevent corrosion or pitting? What effect has oxygen or
carbon dioxide on metals? - ANSWERS-Corrosion is prevented by
removing oxygen and other gases by preheating the boiler feedwater,
adding oxygenscavenging chemical sulfite and keeping boiler water
pH above 9.0 (prevents from acid corrosion).Oxygen causes pitting of
boiler metal and carbon dioxide forms a carbonic acid that can cause
acidic corrosion.
How long can an operating boiler be left unattended? - ANSWERS-10
minutes
If a boiler was very low on water and showed signs of
overheating,should you fill it withwater to cool it down? -
ANSWERS-Absolutely not. It might cause an explosion or at least
thermal shock to the boiler metal.
What are the precautions to be observed when starting any boiler that
has been closed dow overnight? Are there any special precautions
required starting a gas burning boiler? - ANSWERS-Make a physical
observation of the boiler and its systems, walk around the boilerto
check for any abnormal conditions such as flammable material at the
dampers, fuel leaks,damaged electrical conduits, etc. Check all boiler
systems (feedwater, fuel, etc). Very important issue in starting a gas
