4B POWER ENGINEERING ACTUAL TEST
QUESTIONS WITH VERIFIED CORRECT
ANSWERS
●● Aqua-Stat
Answer: A hot water boiler fitting that starts and stops the temperature of
the water. The term "AQUASTATTM is a trademark of burner by
sensing the Honeywell International, Inc., originally filed in 1923.
●● Ash
Answer: The non-combustible product of combustion left from the
burning of solid fuel.
●● Atmospheric Burner
Answer: A device for burning gaseous fuels, where combustion air is
delivered to the burner at atmospheric pressure, with no additional
mechanical means.
●● Blowdown
Answer: With regard to boiler waterside operations, the continuous
removal of a portion of boiler water for the purpose of reducing
dissolved solids concentration.
,●● Blowoff
Answer: With regard to boiler waterside operations, the intermittent
removal of a portion of boiler water to discharge sludge.
●● Boil Out
Answer: To remove greasy contaminants from the waterside of a boiler
by first adding caustic or basic chemicals to the boiler water and then
adding heat.
●● Carryover
Answer: The entrainment of water droplets in the steam leaving the
boiler drum.
●● Coalescing Filter
Answer: A filter used to remove water and oil aerosols from compressed
air, by causing smaller particles to come together to form larger
particles.
●● Combustion Air Opening
Answer: An opening from a mechanical room where combustion
equipment is housed that provides the fresh air required for satisfactory
combustion of a fuel, including excess air.
●● Condensate
, Answer: Fluid formed when steam is cooled to below its saturation
temperature.
●● Continuous Blowdown (CBD)
Answer: The continuous removal of concentrated boiler water from a
boiler. This reduces the total solids concentration in the remaining water
●● Cutting In
Answer: The activity of adding a previously non-operating piece of
equipment, such as a boiler, into a system that is already in operation.
●● Day Tank
Answer: A local supply of fuel oil for boilers, emergency generators, or
other oil-fired equipment.
●● Dew Point
Answer: The temperature at which the water vapour in the air is
saturated; the temperature at which water vapour begins to condense out
of the air.
●● Dilution Air
Answer: diverter, or draft regulator, to cool combustion products. The
ambient air that is admitted to a venting system at the draft hood, draft
QUESTIONS WITH VERIFIED CORRECT
ANSWERS
●● Aqua-Stat
Answer: A hot water boiler fitting that starts and stops the temperature of
the water. The term "AQUASTATTM is a trademark of burner by
sensing the Honeywell International, Inc., originally filed in 1923.
●● Ash
Answer: The non-combustible product of combustion left from the
burning of solid fuel.
●● Atmospheric Burner
Answer: A device for burning gaseous fuels, where combustion air is
delivered to the burner at atmospheric pressure, with no additional
mechanical means.
●● Blowdown
Answer: With regard to boiler waterside operations, the continuous
removal of a portion of boiler water for the purpose of reducing
dissolved solids concentration.
,●● Blowoff
Answer: With regard to boiler waterside operations, the intermittent
removal of a portion of boiler water to discharge sludge.
●● Boil Out
Answer: To remove greasy contaminants from the waterside of a boiler
by first adding caustic or basic chemicals to the boiler water and then
adding heat.
●● Carryover
Answer: The entrainment of water droplets in the steam leaving the
boiler drum.
●● Coalescing Filter
Answer: A filter used to remove water and oil aerosols from compressed
air, by causing smaller particles to come together to form larger
particles.
●● Combustion Air Opening
Answer: An opening from a mechanical room where combustion
equipment is housed that provides the fresh air required for satisfactory
combustion of a fuel, including excess air.
●● Condensate
, Answer: Fluid formed when steam is cooled to below its saturation
temperature.
●● Continuous Blowdown (CBD)
Answer: The continuous removal of concentrated boiler water from a
boiler. This reduces the total solids concentration in the remaining water
●● Cutting In
Answer: The activity of adding a previously non-operating piece of
equipment, such as a boiler, into a system that is already in operation.
●● Day Tank
Answer: A local supply of fuel oil for boilers, emergency generators, or
other oil-fired equipment.
●● Dew Point
Answer: The temperature at which the water vapour in the air is
saturated; the temperature at which water vapour begins to condense out
of the air.
●● Dilution Air
Answer: diverter, or draft regulator, to cool combustion products. The
ambient air that is admitted to a venting system at the draft hood, draft
