MN BOILER OPERATOR EXAM PREP 1A 2026: 210 HIGH-
YIELD QUESTIONS AND 100% VERIFIED ANSWERS |
GRADED A+ | GUARANTEED PASS!!
What is meant by A.S.M.E.?
- answer-American Society of Mechanical Engineers
In the event a boiler would explode, overheat due to a low water condition, or a
furnace explosion, etc. and before repairs are made or the boiler is attempted to be
returned to service, who should be notified?
- answer-Code Administration and Inspection Services (Boiler Inspection)
A steam flow meter measures?
- answer-quantity of steam
Why are water tube boilers considered less dangerous than fire tube boilers?
- answer-contain less water
What is the purpose of flooding a super-heater on start up?
- answer-prevent dry firing of the super-heater
What is the purpose of de-superheating?
- answer-control temperature of steam
An economizer is a heat-exchanger located in the
- answer-gas passage between the boiler and the stack
On some hot water boilers a three-way mixing valve is used. What is its purpose?
- answer-controls temperature of water circulating in heating system
A hot water boiler is considered to be a high pressure boiler when it:
- answer-exceeds 250 degrees and/or 160 psi
If it is necessary to test the relieving capacity of a safety valve:
- answer-an accumulation test is put on boiler
,The switch that proves combustion air and is found in the windbox entering the
furnace is
- answer-air switch (sail) switch
An indication of boiler efficiency is obtained from
- answer-temperature of exit gases
As the pressure of steam is increased, the volume is
- answer-decreased
Before starting a fire, when firing with oil, pulverized fuel, or gas, what precaution
must be taken with a furnace?
- answer-purge all unburned gases of the boiler
A steam gauge dial must be graduated to at least what percent of the safe working
pressure of the boiler?
- answer-150%
Assuming all components in a hydronic system are working, what would be the
main reason be for no heat?
- answer-air in the system
What is a high temperature water boiler?
- answer-water boiler operating over 160 psi and/or 250 degrees Fahrenheit
What boiler attachment is used to increase the steam temperature above the
temperature of the water from which it is evaporated?
- answer-superheater
As the pressure increases, the density of the steam
- answer-increases
When stop valves over 2 inches in diameter are used on a boiler, they shall be
- answer-rising stem
How can vaporization of the feed water from an open feed water heater to the
pump be eliminated?
- answer-increase the suction head by either raising the feed water heater or
lowering the pump
, When a boiler is being put on-line, the steam pressure on the incoming boiler
should be
- answer-slightly lower than the line pressure
After a liquid boiler has been inspected, and is then refilled with liquid, what must
be done before this liquid boiler can be restored to normal service?
- answer-air must be evacuated from the system
What does high carbon monoxide (CO) in the flue gasses indicate?
- answer-combustion is incomplete
The reading of the draft gauge is referred to as
- answer-inches of water
Electrostatic precipitators are effective in removing
- answer-small dust particles from the gases
Steam impinging on boiler tubes would
- answer-cut through the boiler tubes in a very short period of time
To protect sewer lines from the high temperature and high pressure coming from
the boiler blowdown lines
- answer-blowdown tanks are usedWh
What is the function of the safety valve blow-back ring?
- answer-to increase or decrease the amount of blow down
On a boiler feed pump, which pipe should be the larger?
- answer-suction pipe
When the boiler heating surface exceeds 500 square feet, what is the minimum
number of safety valves required?
- answer-two
What is the purpose of a boiler feed water regulator?
- answer-to control water level in the boiler
What is the minimum safety valve relieving capacity in pounds per hour per square
foot of heating surface on a mechanically fired fire-tube boiler?
- answer-8 pounds
YIELD QUESTIONS AND 100% VERIFIED ANSWERS |
GRADED A+ | GUARANTEED PASS!!
What is meant by A.S.M.E.?
- answer-American Society of Mechanical Engineers
In the event a boiler would explode, overheat due to a low water condition, or a
furnace explosion, etc. and before repairs are made or the boiler is attempted to be
returned to service, who should be notified?
- answer-Code Administration and Inspection Services (Boiler Inspection)
A steam flow meter measures?
- answer-quantity of steam
Why are water tube boilers considered less dangerous than fire tube boilers?
- answer-contain less water
What is the purpose of flooding a super-heater on start up?
- answer-prevent dry firing of the super-heater
What is the purpose of de-superheating?
- answer-control temperature of steam
An economizer is a heat-exchanger located in the
- answer-gas passage between the boiler and the stack
On some hot water boilers a three-way mixing valve is used. What is its purpose?
- answer-controls temperature of water circulating in heating system
A hot water boiler is considered to be a high pressure boiler when it:
- answer-exceeds 250 degrees and/or 160 psi
If it is necessary to test the relieving capacity of a safety valve:
- answer-an accumulation test is put on boiler
,The switch that proves combustion air and is found in the windbox entering the
furnace is
- answer-air switch (sail) switch
An indication of boiler efficiency is obtained from
- answer-temperature of exit gases
As the pressure of steam is increased, the volume is
- answer-decreased
Before starting a fire, when firing with oil, pulverized fuel, or gas, what precaution
must be taken with a furnace?
- answer-purge all unburned gases of the boiler
A steam gauge dial must be graduated to at least what percent of the safe working
pressure of the boiler?
- answer-150%
Assuming all components in a hydronic system are working, what would be the
main reason be for no heat?
- answer-air in the system
What is a high temperature water boiler?
- answer-water boiler operating over 160 psi and/or 250 degrees Fahrenheit
What boiler attachment is used to increase the steam temperature above the
temperature of the water from which it is evaporated?
- answer-superheater
As the pressure increases, the density of the steam
- answer-increases
When stop valves over 2 inches in diameter are used on a boiler, they shall be
- answer-rising stem
How can vaporization of the feed water from an open feed water heater to the
pump be eliminated?
- answer-increase the suction head by either raising the feed water heater or
lowering the pump
, When a boiler is being put on-line, the steam pressure on the incoming boiler
should be
- answer-slightly lower than the line pressure
After a liquid boiler has been inspected, and is then refilled with liquid, what must
be done before this liquid boiler can be restored to normal service?
- answer-air must be evacuated from the system
What does high carbon monoxide (CO) in the flue gasses indicate?
- answer-combustion is incomplete
The reading of the draft gauge is referred to as
- answer-inches of water
Electrostatic precipitators are effective in removing
- answer-small dust particles from the gases
Steam impinging on boiler tubes would
- answer-cut through the boiler tubes in a very short period of time
To protect sewer lines from the high temperature and high pressure coming from
the boiler blowdown lines
- answer-blowdown tanks are usedWh
What is the function of the safety valve blow-back ring?
- answer-to increase or decrease the amount of blow down
On a boiler feed pump, which pipe should be the larger?
- answer-suction pipe
When the boiler heating surface exceeds 500 square feet, what is the minimum
number of safety valves required?
- answer-two
What is the purpose of a boiler feed water regulator?
- answer-to control water level in the boiler
What is the minimum safety valve relieving capacity in pounds per hour per square
foot of heating surface on a mechanically fired fire-tube boiler?
- answer-8 pounds
