OHIO BOILERS STUDY EXAMS GUIDE QUESTIONS
AND ANSWERS SURE A+
✔✔how quickly must a flame detector in an industrial boiler detect loss of flame? -
✔✔within 4 seconds
✔✔(LP) when lighting a low pressure gas burner on a LP boiler, what is the last step? -
✔✔lift the manual reset valve
✔✔the primary difference between a high pressure gas burner and a low pressure gass
burner is? - ✔✔the location where the air and fuel are mixed
✔✔(LP) what is the pressure on a low pressure gas burner? - ✔✔0psi
✔✔gas flames have a tendency to pulsate, this can be eliminated by? - ✔✔increasing
draft
✔✔what is the percentage of excess air needed for complete combustion when using a
fuel oil burner? - ✔✔3-15%
✔✔what is not a type of automatic combustion control system? - ✔✔regulating
, ✔✔what is the only way you know for sure how much carbon monoxide you have
coming out of the stack? - ✔✔flue gasanalysis
✔✔what items is the electronic flue gas analyzer capable of reading? - ✔✔02, CO2,
CO, temperature, and smoke
✔✔on what type of boiler are sootblowers used? - ✔✔watertube
✔✔if it is determined that sootblowers are needed to be operated on a boiler and theyre
operated manually, what should be done first? - ✔✔open the drain to remove
condensate from the sootblowers steam supply
✔✔when are the sootblowers for heating surfaces used when firing coal? - ✔✔once per
shift
✔✔when are soot blowers for economizers and air preheaters used when firing coal? -
✔✔dialy
✔✔what are results of flame impingement? - ✔✔slagging of the boiler tubes, high boiler
tube temp, accelerated tube corrosion on the fire side
✔✔in what type of draft system is the chimney design the least important? - ✔✔induced
draft
✔✔which type of draft created a pressure lower than atmospheric pressure in the
furnace? - ✔✔induced or balanced
✔✔which fan blade design is best for preventing erosion due to flyash particles
entrained in the flue gas flow? - ✔✔radial straight
✔✔what limits the amount of coal that may be burned per sq ft. of grate surface? -
✔✔the amount of combustion air that may be delivered by the FD fan
✔✔when using a soker caol-fired boiler, what are the recommended percentages of
underfire air vs. overfire air? - ✔✔65% under, 35% over
✔✔what is not used to measure the quantity of combustion air? - ✔✔rotometer
✔✔during normal boiler operation, what cant you use to determine relative air quantity
delivered to the furnace? - ✔✔venturi flow meter
✔✔what is a way to check the relative quantity of air being supplied to the furnace? -
✔✔flue gas analysis
AND ANSWERS SURE A+
✔✔how quickly must a flame detector in an industrial boiler detect loss of flame? -
✔✔within 4 seconds
✔✔(LP) when lighting a low pressure gas burner on a LP boiler, what is the last step? -
✔✔lift the manual reset valve
✔✔the primary difference between a high pressure gas burner and a low pressure gass
burner is? - ✔✔the location where the air and fuel are mixed
✔✔(LP) what is the pressure on a low pressure gas burner? - ✔✔0psi
✔✔gas flames have a tendency to pulsate, this can be eliminated by? - ✔✔increasing
draft
✔✔what is the percentage of excess air needed for complete combustion when using a
fuel oil burner? - ✔✔3-15%
✔✔what is not a type of automatic combustion control system? - ✔✔regulating
, ✔✔what is the only way you know for sure how much carbon monoxide you have
coming out of the stack? - ✔✔flue gasanalysis
✔✔what items is the electronic flue gas analyzer capable of reading? - ✔✔02, CO2,
CO, temperature, and smoke
✔✔on what type of boiler are sootblowers used? - ✔✔watertube
✔✔if it is determined that sootblowers are needed to be operated on a boiler and theyre
operated manually, what should be done first? - ✔✔open the drain to remove
condensate from the sootblowers steam supply
✔✔when are the sootblowers for heating surfaces used when firing coal? - ✔✔once per
shift
✔✔when are soot blowers for economizers and air preheaters used when firing coal? -
✔✔dialy
✔✔what are results of flame impingement? - ✔✔slagging of the boiler tubes, high boiler
tube temp, accelerated tube corrosion on the fire side
✔✔in what type of draft system is the chimney design the least important? - ✔✔induced
draft
✔✔which type of draft created a pressure lower than atmospheric pressure in the
furnace? - ✔✔induced or balanced
✔✔which fan blade design is best for preventing erosion due to flyash particles
entrained in the flue gas flow? - ✔✔radial straight
✔✔what limits the amount of coal that may be burned per sq ft. of grate surface? -
✔✔the amount of combustion air that may be delivered by the FD fan
✔✔when using a soker caol-fired boiler, what are the recommended percentages of
underfire air vs. overfire air? - ✔✔65% under, 35% over
✔✔what is not used to measure the quantity of combustion air? - ✔✔rotometer
✔✔during normal boiler operation, what cant you use to determine relative air quantity
delivered to the furnace? - ✔✔venturi flow meter
✔✔what is a way to check the relative quantity of air being supplied to the furnace? -
✔✔flue gas analysis
