BLACK SEAL HIGH PRESSURE STUDY EXAMS
GUIDE ALL QUESTIONS AND ANSWERS SURE A+
✔✔What should the pH level of boiler water be? - ✔✔11
✔✔_____ can lead to water hammer. - ✔✔carryover
✔✔Oxygen in boiler water causes _____. - ✔✔pitting
✔✔What dial range must a boiler pressure gauge have? - ✔✔1 1/2 times the boiler's
MAWP
✔✔What is the first thing a boiler operator should do after entering the boiler room? -
✔✔check the boiler water level
✔✔Preparation for a boiler inspection requires having the boiler _____. - ✔✔cooled,
opened and thoroughly cleaned
✔✔Cast iron sectional boilers are built for what type of draft firing? - ✔✔mechanical
forced and/or induced
✔✔A furnace explosion can be prevented by _____. - ✔✔purging after ignition failure
, ✔✔What chemical is used to control alkalinity? - ✔✔caustic soda
✔✔As solids and alkalinity in boiler water increase: - ✔✔waterside scaling is increased
✔✔What is the most readily discernible indication of firing with insufficient secondary
air? - ✔✔black smoke coming from the stack
✔✔In a two-pipe direct return hot water heating system, the supply and return flow in
the same direction. - ✔✔false
✔✔What is the maximum size of the bottom blowdown line? - ✔✔2.5"
✔✔To avoid the danger of a furnace explosion during start-up, the firing sequence
allows for: - ✔✔a pre-purge period
✔✔Which of the following would cause scale in a boiler? - ✔✔calcium and magnesium
✔✔What is the pressure called in an idle boiler? - ✔✔static pressure
✔✔What is the main purpose of an automatic FW (feedwater) regulator? - ✔✔maintain
boiler water level
✔✔What happens if a steam trap blows through? - ✔✔steam vents from condensate
tank
✔✔A log book is needed in all plants that have over how much horsepower? - ✔✔100
horsepower
✔✔In a plant that has only 100 horsepower, a licensed operator is required. - ✔✔False
✔✔What is the heat content of one therm of natural gas? - ✔✔100,000 Btu's
✔✔Carryover can lead to: - ✔✔water hammer
✔✔What is the most common cause of problems in a hydronic system? - ✔✔air
✔✔The metering combustion control system is sensitive to changes in: - ✔✔steam flow
and pressure
✔✔If a boiler has been dry fired, what device did not work properly? - ✔✔low water cut-
off
GUIDE ALL QUESTIONS AND ANSWERS SURE A+
✔✔What should the pH level of boiler water be? - ✔✔11
✔✔_____ can lead to water hammer. - ✔✔carryover
✔✔Oxygen in boiler water causes _____. - ✔✔pitting
✔✔What dial range must a boiler pressure gauge have? - ✔✔1 1/2 times the boiler's
MAWP
✔✔What is the first thing a boiler operator should do after entering the boiler room? -
✔✔check the boiler water level
✔✔Preparation for a boiler inspection requires having the boiler _____. - ✔✔cooled,
opened and thoroughly cleaned
✔✔Cast iron sectional boilers are built for what type of draft firing? - ✔✔mechanical
forced and/or induced
✔✔A furnace explosion can be prevented by _____. - ✔✔purging after ignition failure
, ✔✔What chemical is used to control alkalinity? - ✔✔caustic soda
✔✔As solids and alkalinity in boiler water increase: - ✔✔waterside scaling is increased
✔✔What is the most readily discernible indication of firing with insufficient secondary
air? - ✔✔black smoke coming from the stack
✔✔In a two-pipe direct return hot water heating system, the supply and return flow in
the same direction. - ✔✔false
✔✔What is the maximum size of the bottom blowdown line? - ✔✔2.5"
✔✔To avoid the danger of a furnace explosion during start-up, the firing sequence
allows for: - ✔✔a pre-purge period
✔✔Which of the following would cause scale in a boiler? - ✔✔calcium and magnesium
✔✔What is the pressure called in an idle boiler? - ✔✔static pressure
✔✔What is the main purpose of an automatic FW (feedwater) regulator? - ✔✔maintain
boiler water level
✔✔What happens if a steam trap blows through? - ✔✔steam vents from condensate
tank
✔✔A log book is needed in all plants that have over how much horsepower? - ✔✔100
horsepower
✔✔In a plant that has only 100 horsepower, a licensed operator is required. - ✔✔False
✔✔What is the heat content of one therm of natural gas? - ✔✔100,000 Btu's
✔✔Carryover can lead to: - ✔✔water hammer
✔✔What is the most common cause of problems in a hydronic system? - ✔✔air
✔✔The metering combustion control system is sensitive to changes in: - ✔✔steam flow
and pressure
✔✔If a boiler has been dry fired, what device did not work properly? - ✔✔low water cut-
off
