Study Guide Questions (LA Steam
Engineer License Exam)
How do you determine whether or not feedwater take a look at valve for the boiler isn't always
last? - ANS-Check the temperature differential at the take a look at valve whilst feedwater pump
isn't always in operation.
How do you prevent corrosion or pitting? What effect has oxygen or carbon dioxide on metals? -
ANS-Corrosion is prevented by doing away with oxygen and different gases via preheating the
boiler feedwater, including oxygenscavenging chemical sulfite and retaining boiler water pH
above 9.0 (prevents from acid corrosion).Oxygen causes pitting of boiler metal and carbon
dioxide bureaucracy a carbonic acid which could cause acidic corrosion.
How do you test a protection valve to look if it operates at the proper set strain? What is the
distinction among a safety valve and a comfort valve? How regularly do you test these valves?
How is leaking safety valve repaired? - ANS-Pressure valves may be examined hydrostatically
(boiler filled up with water stress).Safety valves open straight away and remedy valves do no
longer open completely with a hard and fast pressure.Safety valves are tested manually once a
month and stress tested once a yr.Safety valves can be simplest repaired by means of a
manufacturer or a licensed organization.
How lengthy can an running boiler be left unattended? - ANS-10 minutes
How often need to a boiler be blown down? If the boiler water is handled, is it vital to blow down
the boiler regular? Why? What is the reason of treating the boiler water? What is TDS? -
ANS-Boiler ought to be blown down at least as soon as every 24 hours, even if the boiler water
is treated. By doing bottom blowdown we cast off mud-like sludge and strong sediments that
settle on the mud drum backside. We chemically deal with boiler water to prevent formation of
scale on boiler heating surfaces,pitting of boiler steel, foaming and priming. TDS stands for
"total dissolved solids". For a boiler up to 250 psi amount of TDS shall not exceed 3000 -3500
ppm.
If a boiler changed into very low on water and showed symptoms of overheating,ought to you fill
it withwater to chill it down? - ANS-Absolutely now not. It may cause an explosion or at least
thermal surprise to the boiler metal.
If the boiler feedwater pump is operating and the boiler feedwater isn't always growing, what's
the satisfactory thing to do? Can you growth the velocity of the feedwater pump for more water
extent? - ANS-One of the alternatives available is to decrease firing rate of the boiler and spot if
the water level stabilizes. Another alternative is to convey the second pump on-line.If those two
Engineer License Exam)
How do you determine whether or not feedwater take a look at valve for the boiler isn't always
last? - ANS-Check the temperature differential at the take a look at valve whilst feedwater pump
isn't always in operation.
How do you prevent corrosion or pitting? What effect has oxygen or carbon dioxide on metals? -
ANS-Corrosion is prevented by doing away with oxygen and different gases via preheating the
boiler feedwater, including oxygenscavenging chemical sulfite and retaining boiler water pH
above 9.0 (prevents from acid corrosion).Oxygen causes pitting of boiler metal and carbon
dioxide bureaucracy a carbonic acid which could cause acidic corrosion.
How do you test a protection valve to look if it operates at the proper set strain? What is the
distinction among a safety valve and a comfort valve? How regularly do you test these valves?
How is leaking safety valve repaired? - ANS-Pressure valves may be examined hydrostatically
(boiler filled up with water stress).Safety valves open straight away and remedy valves do no
longer open completely with a hard and fast pressure.Safety valves are tested manually once a
month and stress tested once a yr.Safety valves can be simplest repaired by means of a
manufacturer or a licensed organization.
How lengthy can an running boiler be left unattended? - ANS-10 minutes
How often need to a boiler be blown down? If the boiler water is handled, is it vital to blow down
the boiler regular? Why? What is the reason of treating the boiler water? What is TDS? -
ANS-Boiler ought to be blown down at least as soon as every 24 hours, even if the boiler water
is treated. By doing bottom blowdown we cast off mud-like sludge and strong sediments that
settle on the mud drum backside. We chemically deal with boiler water to prevent formation of
scale on boiler heating surfaces,pitting of boiler steel, foaming and priming. TDS stands for
"total dissolved solids". For a boiler up to 250 psi amount of TDS shall not exceed 3000 -3500
ppm.
If a boiler changed into very low on water and showed symptoms of overheating,ought to you fill
it withwater to chill it down? - ANS-Absolutely now not. It may cause an explosion or at least
thermal surprise to the boiler metal.
If the boiler feedwater pump is operating and the boiler feedwater isn't always growing, what's
the satisfactory thing to do? Can you growth the velocity of the feedwater pump for more water
extent? - ANS-One of the alternatives available is to decrease firing rate of the boiler and spot if
the water level stabilizes. Another alternative is to convey the second pump on-line.If those two
