MN BOILER EXAM REVIEW 2026: 226 MOST
TESTED QUESTIONS AND 100% VERIFIED
ANSWERS | GRADED A+ | GUARANTEED PASS!!
3 types of blowdown
- answer-surface blow, continuous blow, bottom blow
3 types of heat transfer
- answer-Conduction, convection, radiation
3 Types of Industrial Water Tubes
- answer-A, O, and D (most efficient, most common)
3 types of steam traps
- answer-Thermostatic, float thermostatic, inverted bucket (longest life cycle)
4 subsystems necessary for plant to run
- answer-steam, feed, fuel, and draft
4 Types of draft
- answer-Forced, Induced, Balanced, Natural
4 types of flame scanners
- answer-Infrared- heat detection
UV- detects light
Rectifying flame rod- completes circuit, runs off electricity
Thermocouple-senses heat
According to ASME, how many valves must be on the main steam line of a high
pressure steam boiler?
- answer-2. Jurisdiction ends after second.
According to MN code, what kind of valve must be used if they are over 2 inches
in diameter
- answer-rising stem valve
,Accumulation test
- answer-must relieve all pressure on boiler at 100% firing rate and not exceed 6%
MAWP
Advantage of Water Tubes over Fire Tubes
- answer-WTB contains less water for same horsepower output of FTB. Most of
energy is contained in water not steam. Recovery rate is greater than fire tube
because of less water. (Less energy to heat smaller mass)
After installing new gauge glass, what should you do
- answer-open steam then water to allow it to warm up
aftermix burner
- answer-mixed leaving burner
air separators
- answer-separates air from water
Amines
- answer-added to increase pH, boil off at 212 and leave with steam
Aquastat
- answer-Controls temp in hot water system
ASME
- answer-American Society of Mechanical Engineers
atm. vent
- answer-allows non condensable gases to escape
Atomization
- answer-Air, steam, mechanical/pressure, rotary cup (constant capacity used in
heavy oil burners)
Attendance for 0-30 Hp, 31-200 Hp, +200 Hp, 300+ Hp
- answer-0-30 in Hp boiler plant must be checked daily,
31-200 may be left unattended for no more than 2 consecutive hours when
occupied by the public but not approaching continual absence.
200+ when in operation requires constant attendance. May leave for up to 30 min
but must be within 500 ft at all times
, 300+ must have chief engineer who ensures safe operation and maintenance of
boiler plant
auto make up feeder
- answer-maintain condensate tank level
autoignition temp
- answer-temp fuel will spontaneously combust
automatic non return valve
- answer-mounted on main steam return valve. In plants with more than one boiler.
can be used for isolation on lock out tag out
Baffle
- answer-used in all boilers (fireside and waterside) to direct flow for greatest
efficiency
Balanced Draft
- answer-combination of forced and induced
Before entering boiler for cleaning
- answer-check for hazardous atm., purge vent furnace and or drum, tag and lock
out all power sources after boiler off line, drained, and cooled
Best way to check steam trap for proper operation
- answer-stethoscope
Blowdown/Blowback minimum
- answer-2 psi, max is 6% MAWP
Boiler Accessories
- answer-components necessary for boiler to run but NOT attached to boiler (Feed
pump, fuel pump, condensate tank and pump, surge tank, Deaerator)
Boiler Pass
- answer-where heat of combustion travels length of furnace or boiler tubes
Boiler trim
- answer-Valves and components directly attached to boiler necessary for it to run.
TESTED QUESTIONS AND 100% VERIFIED
ANSWERS | GRADED A+ | GUARANTEED PASS!!
3 types of blowdown
- answer-surface blow, continuous blow, bottom blow
3 types of heat transfer
- answer-Conduction, convection, radiation
3 Types of Industrial Water Tubes
- answer-A, O, and D (most efficient, most common)
3 types of steam traps
- answer-Thermostatic, float thermostatic, inverted bucket (longest life cycle)
4 subsystems necessary for plant to run
- answer-steam, feed, fuel, and draft
4 Types of draft
- answer-Forced, Induced, Balanced, Natural
4 types of flame scanners
- answer-Infrared- heat detection
UV- detects light
Rectifying flame rod- completes circuit, runs off electricity
Thermocouple-senses heat
According to ASME, how many valves must be on the main steam line of a high
pressure steam boiler?
- answer-2. Jurisdiction ends after second.
According to MN code, what kind of valve must be used if they are over 2 inches
in diameter
- answer-rising stem valve
,Accumulation test
- answer-must relieve all pressure on boiler at 100% firing rate and not exceed 6%
MAWP
Advantage of Water Tubes over Fire Tubes
- answer-WTB contains less water for same horsepower output of FTB. Most of
energy is contained in water not steam. Recovery rate is greater than fire tube
because of less water. (Less energy to heat smaller mass)
After installing new gauge glass, what should you do
- answer-open steam then water to allow it to warm up
aftermix burner
- answer-mixed leaving burner
air separators
- answer-separates air from water
Amines
- answer-added to increase pH, boil off at 212 and leave with steam
Aquastat
- answer-Controls temp in hot water system
ASME
- answer-American Society of Mechanical Engineers
atm. vent
- answer-allows non condensable gases to escape
Atomization
- answer-Air, steam, mechanical/pressure, rotary cup (constant capacity used in
heavy oil burners)
Attendance for 0-30 Hp, 31-200 Hp, +200 Hp, 300+ Hp
- answer-0-30 in Hp boiler plant must be checked daily,
31-200 may be left unattended for no more than 2 consecutive hours when
occupied by the public but not approaching continual absence.
200+ when in operation requires constant attendance. May leave for up to 30 min
but must be within 500 ft at all times
, 300+ must have chief engineer who ensures safe operation and maintenance of
boiler plant
auto make up feeder
- answer-maintain condensate tank level
autoignition temp
- answer-temp fuel will spontaneously combust
automatic non return valve
- answer-mounted on main steam return valve. In plants with more than one boiler.
can be used for isolation on lock out tag out
Baffle
- answer-used in all boilers (fireside and waterside) to direct flow for greatest
efficiency
Balanced Draft
- answer-combination of forced and induced
Before entering boiler for cleaning
- answer-check for hazardous atm., purge vent furnace and or drum, tag and lock
out all power sources after boiler off line, drained, and cooled
Best way to check steam trap for proper operation
- answer-stethoscope
Blowdown/Blowback minimum
- answer-2 psi, max is 6% MAWP
Boiler Accessories
- answer-components necessary for boiler to run but NOT attached to boiler (Feed
pump, fuel pump, condensate tank and pump, surge tank, Deaerator)
Boiler Pass
- answer-where heat of combustion travels length of furnace or boiler tubes
Boiler trim
- answer-Valves and components directly attached to boiler necessary for it to run.
