STATIONARY ENGINEER CORE EXAMS SET QUESTIONS
AND SOLUTIONS 2025/2026 GRADED A+
✔✔CONDENSATE - ✔✔Condensed water resulting from the removal of latent heat
from steam.
✔✔CONTINUOUS BLOWDOWN - ✔✔The uninterrupted removal of concentrated boiler
water from a boiler to control total solids concentration in the remaining water.
✔✔CONTROL VALVE - ✔✔A valve used to control the flow of air, gas, water, steam or
other substance.
✔✔DAMPER - ✔✔- A device for introducing a variable pressure drop in a system used
for regulating the volumetric flow of a gas, such as air.
✔✔DEAERATION - ✔✔Removal of air and gases from boiler feed water prior to its
introduction to a boiler.
✔✔DOWNCOMER - ✔✔A tube or pipe in a boiler or waterwall circulating system
through which fluid flows downward.
✔✔DRAFT - ✔✔The difference between atmospheric pressure and some lower
pressure existing in the furnace stack or gas passages of a steam generating unit.
✔✔DRY STEAM - ✔✔Steam containing no moisture. Commercially dry steam
containing not more than one half of one percent moisture.
✔✔ECONOMIZER - ✔✔Utilizes waste heat by transferring heat from flue gases to
warm incoming feedwater.
✔✔ELECTROSTATIC PRECIPITATOR - ✔✔A device for collecting dust, mist or fume
from a gas stream, by placing an electrical charge on the particle and removing that
particle onto a collecting electrode.
✔✔EXPANSION JOINT - ✔✔The joint to permit movement due to expansion without
undue stress.
✔✔FEED PUMP - ✔✔A pump that supplies water to a boiler.
✔✔FEEDWATER - ✔✔Water introduced into a boiler during operation. It includes
make-up and return condensate.
✔✔FIRING RATE CONTROL - ✔✔A pressure temperature or flow controller which
controls the firing rate of a burner according to the deviation from pressure or
, temperature set point. The system may be arranged to operate the burner on-off, high-
low or in proportion to load demand.
✔✔FLAME DETECTOR - ✔✔A device which indicates if a fuel (liquid, gaseous, or
pulverized) is burning, or if ignition has been lost. The indication may be transmitted to a
signal or to a control system.
✔✔FLASHING - ✔✔The process of producing steam by discharging water into a region
of pressure lower than the saturation pressure that corresponds to the water
temperature
✔✔FLUE - ✔✔A passage for products of combustion.
✔✔FLASH POINT - ✔✔The lowest temperature at which, under specified conditions,
fuel oil gives off enough vapor to flash into a momentary flame when ignited.
✔✔FOAMING - ✔✔The continuous formation of bubbles which have sufficiently high
surface tension to remain as bubbles beyond the disengaging surface.
✔✔ABT - ✔✔Automatic Bus Transfer, utility to UPS
✔✔Air Ejector - ✔✔Type of Jet Pump used to remove air and other gases from a
condenser
✔✔Air Register - ✔✔Device in the casing of a boiler, used for regulating the amount of
air for combustion and to provide a circular motion of air.
✔✔Alloy - ✔✔Mixture of 2 or more metals
✔✔Ammeter - ✔✔Instrument for measuring rate of flow of electrical current in amperes
✔✔Annealing - ✔✔Softening of metal by heating and slow cooloing
✔✔Automatic Combustion Control System (ACC) - ✔✔A system that provides a means
for automatically controlling fuel and air mixture
✔✔Back Pressure - ✔✔Pressure exerted on the exhaust side of a pump or engine
✔✔BDC - ✔✔Bottom Dead Center
✔✔Boiler Design Pressure - ✔✔Pressure specified by OEM, usually about 103% of
normal steam drum operation pressure
✔✔Boiler internal fittings - ✔✔Parts in side of the boiler which control steam and water
AND SOLUTIONS 2025/2026 GRADED A+
✔✔CONDENSATE - ✔✔Condensed water resulting from the removal of latent heat
from steam.
✔✔CONTINUOUS BLOWDOWN - ✔✔The uninterrupted removal of concentrated boiler
water from a boiler to control total solids concentration in the remaining water.
✔✔CONTROL VALVE - ✔✔A valve used to control the flow of air, gas, water, steam or
other substance.
✔✔DAMPER - ✔✔- A device for introducing a variable pressure drop in a system used
for regulating the volumetric flow of a gas, such as air.
✔✔DEAERATION - ✔✔Removal of air and gases from boiler feed water prior to its
introduction to a boiler.
✔✔DOWNCOMER - ✔✔A tube or pipe in a boiler or waterwall circulating system
through which fluid flows downward.
✔✔DRAFT - ✔✔The difference between atmospheric pressure and some lower
pressure existing in the furnace stack or gas passages of a steam generating unit.
✔✔DRY STEAM - ✔✔Steam containing no moisture. Commercially dry steam
containing not more than one half of one percent moisture.
✔✔ECONOMIZER - ✔✔Utilizes waste heat by transferring heat from flue gases to
warm incoming feedwater.
✔✔ELECTROSTATIC PRECIPITATOR - ✔✔A device for collecting dust, mist or fume
from a gas stream, by placing an electrical charge on the particle and removing that
particle onto a collecting electrode.
✔✔EXPANSION JOINT - ✔✔The joint to permit movement due to expansion without
undue stress.
✔✔FEED PUMP - ✔✔A pump that supplies water to a boiler.
✔✔FEEDWATER - ✔✔Water introduced into a boiler during operation. It includes
make-up and return condensate.
✔✔FIRING RATE CONTROL - ✔✔A pressure temperature or flow controller which
controls the firing rate of a burner according to the deviation from pressure or
, temperature set point. The system may be arranged to operate the burner on-off, high-
low or in proportion to load demand.
✔✔FLAME DETECTOR - ✔✔A device which indicates if a fuel (liquid, gaseous, or
pulverized) is burning, or if ignition has been lost. The indication may be transmitted to a
signal or to a control system.
✔✔FLASHING - ✔✔The process of producing steam by discharging water into a region
of pressure lower than the saturation pressure that corresponds to the water
temperature
✔✔FLUE - ✔✔A passage for products of combustion.
✔✔FLASH POINT - ✔✔The lowest temperature at which, under specified conditions,
fuel oil gives off enough vapor to flash into a momentary flame when ignited.
✔✔FOAMING - ✔✔The continuous formation of bubbles which have sufficiently high
surface tension to remain as bubbles beyond the disengaging surface.
✔✔ABT - ✔✔Automatic Bus Transfer, utility to UPS
✔✔Air Ejector - ✔✔Type of Jet Pump used to remove air and other gases from a
condenser
✔✔Air Register - ✔✔Device in the casing of a boiler, used for regulating the amount of
air for combustion and to provide a circular motion of air.
✔✔Alloy - ✔✔Mixture of 2 or more metals
✔✔Ammeter - ✔✔Instrument for measuring rate of flow of electrical current in amperes
✔✔Annealing - ✔✔Softening of metal by heating and slow cooloing
✔✔Automatic Combustion Control System (ACC) - ✔✔A system that provides a means
for automatically controlling fuel and air mixture
✔✔Back Pressure - ✔✔Pressure exerted on the exhaust side of a pump or engine
✔✔BDC - ✔✔Bottom Dead Center
✔✔Boiler Design Pressure - ✔✔Pressure specified by OEM, usually about 103% of
normal steam drum operation pressure
✔✔Boiler internal fittings - ✔✔Parts in side of the boiler which control steam and water
