MINNESOTA SPECIAL ENGINEER BOILER 2025/2026
QUESTIONS WITH ANSWERS TAGGED A+
✔✔____________ is the flow of air or gases of combustion caused by a difference in
pressure between two points - ✔✔Draft
✔✔The main function of a gas burner is to ____________ - ✔✔mix the gas with
combustion air
✔✔Combustion is a ____________ - ✔✔chemical combination of the elements of fuel
with oxygen
✔✔Modulating combustion controls ____________ - ✔✔regulate the burner firing rate
✔✔The function of a flame failure device is to shut off the ____________ - ✔✔fuel
supply when the burner flame goes out
✔✔A steam boiler operating control is used to control the ____________ - ✔✔steam
pressure in the boiler
✔✔Before filling a boiler with water, the licensed engineer should ensure that
____________ - ✔✔the flame scanner has been tested
✔✔In a dearator, dissolved gases are removed from the water by ____________ -
✔✔forcing the water through organic screens and venting the gases to the atmosphere
✔✔A low-water fuel cutoff (LWCO) prevents boiler damage by ____________ -
✔✔cutting off the fuel supply to the boiler until normal water level is restored, then
automatically restarting the fuel supply
✔✔The correct procedure for blowing down a high pressure boiler is to open
____________ - ✔✔the quick-opening valve first and close it last
✔✔The boiling point of water within a pressurized boiler will ____________ -
✔✔increase as the pressure in the boiler increases
✔✔Boiler water with a pH of 6 is considered ____________ - ✔✔acidic
✔✔The main purpose for chemically treating boiler feedwater is to ____________ -
✔✔protect the boiler internal surfaces from the impurities in feedwater
✔✔Internal water treatment ____________ - ✔✔consists of chemicals added to the
boiler feedwater
, ✔✔The pH of the boiler water should be kept ____________ - ✔✔at 7.0 to 8.5
✔✔Foaming in a boiler may be caused by ____________ - ✔✔a high concentration of
dissolved solids in the boiler water
✔✔____________ is any solid impurity in water that cannot be dissolved. -
✔✔Suspended matter
✔✔The maximum pressure allowed in a low pressure hot water boiler is no more than
____________ psig. - ✔✔160
✔✔A hydrostatic test is a mandatory requirement when a new boiler is installed in the
State of Minnesota. The test pressure must not exceed ____________ times the
maximum allowable working pressure. - ✔✔1.5
✔✔As steam pressure increases, there is a corresponding increase in the
____________ - ✔✔boiling temperature of the water in the boiler
✔✔The evaporative capacity of a steam boiler is stated as pounds of steam per
____________ - ✔✔hour
✔✔The most important valve on a boiler is the ____________ valve - ✔✔safety
✔✔A cross tee fitting is used on boiler column connections to ____________ -
✔✔access the connecting piping for cleaning
✔✔A firetube boiler is a boiler that has ____________ - ✔✔water on the outside of the
tubes and hot gas on the inside of the tubes
✔✔When heat is transferred by the flow of fluids, it is known as ____________ -
✔✔convection
✔✔Improper drainage of steam lines could ____________ - ✔✔result in water hammer
✔✔ A Special Engineer is expected to be competent, take charge of, and be
responsible for the safe operation and maintenance of all classes of boilers of not more
than ___________ HP and their appurtenances. - ✔✔50
✔✔A gauge glass can be attached to a ____________ column, which is attached to a
boiler. - ✔✔water
QUESTIONS WITH ANSWERS TAGGED A+
✔✔____________ is the flow of air or gases of combustion caused by a difference in
pressure between two points - ✔✔Draft
✔✔The main function of a gas burner is to ____________ - ✔✔mix the gas with
combustion air
✔✔Combustion is a ____________ - ✔✔chemical combination of the elements of fuel
with oxygen
✔✔Modulating combustion controls ____________ - ✔✔regulate the burner firing rate
✔✔The function of a flame failure device is to shut off the ____________ - ✔✔fuel
supply when the burner flame goes out
✔✔A steam boiler operating control is used to control the ____________ - ✔✔steam
pressure in the boiler
✔✔Before filling a boiler with water, the licensed engineer should ensure that
____________ - ✔✔the flame scanner has been tested
✔✔In a dearator, dissolved gases are removed from the water by ____________ -
✔✔forcing the water through organic screens and venting the gases to the atmosphere
✔✔A low-water fuel cutoff (LWCO) prevents boiler damage by ____________ -
✔✔cutting off the fuel supply to the boiler until normal water level is restored, then
automatically restarting the fuel supply
✔✔The correct procedure for blowing down a high pressure boiler is to open
____________ - ✔✔the quick-opening valve first and close it last
✔✔The boiling point of water within a pressurized boiler will ____________ -
✔✔increase as the pressure in the boiler increases
✔✔Boiler water with a pH of 6 is considered ____________ - ✔✔acidic
✔✔The main purpose for chemically treating boiler feedwater is to ____________ -
✔✔protect the boiler internal surfaces from the impurities in feedwater
✔✔Internal water treatment ____________ - ✔✔consists of chemicals added to the
boiler feedwater
, ✔✔The pH of the boiler water should be kept ____________ - ✔✔at 7.0 to 8.5
✔✔Foaming in a boiler may be caused by ____________ - ✔✔a high concentration of
dissolved solids in the boiler water
✔✔____________ is any solid impurity in water that cannot be dissolved. -
✔✔Suspended matter
✔✔The maximum pressure allowed in a low pressure hot water boiler is no more than
____________ psig. - ✔✔160
✔✔A hydrostatic test is a mandatory requirement when a new boiler is installed in the
State of Minnesota. The test pressure must not exceed ____________ times the
maximum allowable working pressure. - ✔✔1.5
✔✔As steam pressure increases, there is a corresponding increase in the
____________ - ✔✔boiling temperature of the water in the boiler
✔✔The evaporative capacity of a steam boiler is stated as pounds of steam per
____________ - ✔✔hour
✔✔The most important valve on a boiler is the ____________ valve - ✔✔safety
✔✔A cross tee fitting is used on boiler column connections to ____________ -
✔✔access the connecting piping for cleaning
✔✔A firetube boiler is a boiler that has ____________ - ✔✔water on the outside of the
tubes and hot gas on the inside of the tubes
✔✔When heat is transferred by the flow of fluids, it is known as ____________ -
✔✔convection
✔✔Improper drainage of steam lines could ____________ - ✔✔result in water hammer
✔✔ A Special Engineer is expected to be competent, take charge of, and be
responsible for the safe operation and maintenance of all classes of boilers of not more
than ___________ HP and their appurtenances. - ✔✔50
✔✔A gauge glass can be attached to a ____________ column, which is attached to a
boiler. - ✔✔water
