CLASS 5 BOILER EOC TEST 2025/2026 QUESTIONS WITH
ANSWERS GRADED A+
✔✔Feedwater can be pumped through a ___ where it is heated to a relatively high
temperature by the gases of combustion. - ✔✔closed feedwater heater
✔✔In the deaerator tank, a ___ to add makeup water to the deaerator tank to
compensate for the condensate lost. - ✔✔float opens a feed valve
✔✔A shutoff valve is used when ___. - ✔✔making repairs
✔✔On larger watertube boilers, a(n) ___ can heat the feedwater by using gases of
combustion before the feedwater enters the boiler. - ✔✔economizer
✔✔Once fuel oil reaches the burner, it is the function of the burner to ___ the oil so it
can mix with air and burn. - ✔✔atomize
✔✔In a low-pressure gas system, the zero gas governor reduces the pressure of the
gas to ___ psi. - ✔✔0
✔✔In a low-pressure gas system, the air and gas mixture in the furnace is ignited by the
___. - ✔✔pilot
✔✔Modern coal plants use ___ coal that is blown into the combustion chamber where it
burns in suspension. - ✔✔pulverized
✔✔___ valves are typically slow-opening, fast-closing, hydraulic-electric valves and
should have an internal proof-of-closure switch. - ✔✔Safety shutoff
✔✔A(n) ___ is used to clean fuel oil before it goes to a burner. - ✔✔strainer
✔✔Stop valves isolate a tank when ___. - ✔✔it is not in use
✔✔Most steam plants that use No. ___ fuel oil have two tanks. - ✔✔6
✔✔In a basic pulverized coal system, the coal ___ stores the coal before it flows onto
the coal conveyor. - ✔✔bunker
✔✔___ draft results from temperature differences between air and gases of combustion
and is produced with a stack only. - ✔✔Natural
, ✔✔The amount of draft in a(n) ___ draft system can be increased by a taller stack. -
✔✔natural
✔✔___ draft systems are often used in large steam plants such as those in central
heating plants, large industrial boilers, or utility boilers. - ✔✔Combination
✔✔In combination draft systems, ambient air is drawn through the ___ into the forced
draft fan and is discharged into the boiler where combustion occurs. - ✔✔preheater
✔✔CHAPTER 3 - ✔✔
✔✔The setting or adjusting of a safety valve should only be done by a ___. -
✔✔qualified person who is familiar with the construction and operation of the safety
valve
✔✔The ___ is the operating pressure of a boiler as determined by the design and
construction of the boiler in conformance with the ASME Code. - ✔✔maximum
allowable working pressure
✔✔The safety valve on a boiler must be capable of discharging all the steam the boiler
can generate without the pressure increasing more than ___ above the MAWP. - ✔✔6%
✔✔A(n) ___ test is a safety valve test performed to determine if a safety valve opens at
the correct pressure. - ✔✔pop
✔✔A fitting is a ___ and is required for the operation of the boiler. - ✔✔component
directly attached to a boiler
✔✔Steam boilers having more than ___ sq ft of heating surface require two or more
safety valves. - ✔✔500
✔✔___ is the predetermined pressure at which a safety valve opens and remains open
until the pressure drops. - ✔✔Popping pressure
✔✔Electric boilers exceeding ___ kW of input require two safety valves. - ✔✔500
✔✔Drains are placed at the lower section of safety valve discharge piping to ___. -
✔✔remove any condensation that may form
✔✔A(n) ___ test is used to establish the relief capacity of boiler safety valves. -
✔✔accumulation
ANSWERS GRADED A+
✔✔Feedwater can be pumped through a ___ where it is heated to a relatively high
temperature by the gases of combustion. - ✔✔closed feedwater heater
✔✔In the deaerator tank, a ___ to add makeup water to the deaerator tank to
compensate for the condensate lost. - ✔✔float opens a feed valve
✔✔A shutoff valve is used when ___. - ✔✔making repairs
✔✔On larger watertube boilers, a(n) ___ can heat the feedwater by using gases of
combustion before the feedwater enters the boiler. - ✔✔economizer
✔✔Once fuel oil reaches the burner, it is the function of the burner to ___ the oil so it
can mix with air and burn. - ✔✔atomize
✔✔In a low-pressure gas system, the zero gas governor reduces the pressure of the
gas to ___ psi. - ✔✔0
✔✔In a low-pressure gas system, the air and gas mixture in the furnace is ignited by the
___. - ✔✔pilot
✔✔Modern coal plants use ___ coal that is blown into the combustion chamber where it
burns in suspension. - ✔✔pulverized
✔✔___ valves are typically slow-opening, fast-closing, hydraulic-electric valves and
should have an internal proof-of-closure switch. - ✔✔Safety shutoff
✔✔A(n) ___ is used to clean fuel oil before it goes to a burner. - ✔✔strainer
✔✔Stop valves isolate a tank when ___. - ✔✔it is not in use
✔✔Most steam plants that use No. ___ fuel oil have two tanks. - ✔✔6
✔✔In a basic pulverized coal system, the coal ___ stores the coal before it flows onto
the coal conveyor. - ✔✔bunker
✔✔___ draft results from temperature differences between air and gases of combustion
and is produced with a stack only. - ✔✔Natural
, ✔✔The amount of draft in a(n) ___ draft system can be increased by a taller stack. -
✔✔natural
✔✔___ draft systems are often used in large steam plants such as those in central
heating plants, large industrial boilers, or utility boilers. - ✔✔Combination
✔✔In combination draft systems, ambient air is drawn through the ___ into the forced
draft fan and is discharged into the boiler where combustion occurs. - ✔✔preheater
✔✔CHAPTER 3 - ✔✔
✔✔The setting or adjusting of a safety valve should only be done by a ___. -
✔✔qualified person who is familiar with the construction and operation of the safety
valve
✔✔The ___ is the operating pressure of a boiler as determined by the design and
construction of the boiler in conformance with the ASME Code. - ✔✔maximum
allowable working pressure
✔✔The safety valve on a boiler must be capable of discharging all the steam the boiler
can generate without the pressure increasing more than ___ above the MAWP. - ✔✔6%
✔✔A(n) ___ test is a safety valve test performed to determine if a safety valve opens at
the correct pressure. - ✔✔pop
✔✔A fitting is a ___ and is required for the operation of the boiler. - ✔✔component
directly attached to a boiler
✔✔Steam boilers having more than ___ sq ft of heating surface require two or more
safety valves. - ✔✔500
✔✔___ is the predetermined pressure at which a safety valve opens and remains open
until the pressure drops. - ✔✔Popping pressure
✔✔Electric boilers exceeding ___ kW of input require two safety valves. - ✔✔500
✔✔Drains are placed at the lower section of safety valve discharge piping to ___. -
✔✔remove any condensation that may form
✔✔A(n) ___ test is used to establish the relief capacity of boiler safety valves. -
✔✔accumulation
