MN Boiler Operator Exam Prep 1A + Chief || Possible Questions
Accurately Answered.
What is meant by A.S.M.E.? correct answers 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? correct answers Code Administration and Inspection Services (Boiler
Inspection)
A steam flow meter measures? correct answers quantity of steam
Why are water tube boilers considered less dangerous than fire tube boilers? correct answers
contain less water
What is the purpose of flooding a super-heater on start up? correct answers prevent dry firing of
the super-heater
What is the purpose of de-superheating? correct answers control temperature of steam
An economizer is a heat-exchanger located in the correct answers gas passage between the boiler
and the stack
On some hot water boilers a three-way mixing valve is used. What is its purpose? correct
answers controls temperature of water circulating in heating system
A hot water boiler is considered to be a high pressure boiler when it: correct answers exceeds
250 degrees and/or 160 psi
, If it is necessary to test the relieving capacity of a safety valve: correct answers an accumulation
test is put on boiler
The switch that proves combustion air and is found in the windbox entering the furnace is correct
answers air switch (sail) switch
An indication of boiler efficiency is obtained from correct answers temperature of exit gases
As the pressure of steam is increased, the volume is correct answers decreased
Before starting a fire, when firing with oil, pulverized fuel, or gas, what precaution must be taken
with a furnace? correct answers 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? correct answers 150%
Assuming all components in a hydronic system are working, what would be the main reason be
for no heat? correct answers air in the system
What is a high temperature water boiler? correct answers 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? correct answers superheater
As the pressure increases, the density of the steam correct answers increases
When stop valves over 2 inches in diameter are used on a boiler, they shall be correct answers
rising stem
Accurately Answered.
What is meant by A.S.M.E.? correct answers 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? correct answers Code Administration and Inspection Services (Boiler
Inspection)
A steam flow meter measures? correct answers quantity of steam
Why are water tube boilers considered less dangerous than fire tube boilers? correct answers
contain less water
What is the purpose of flooding a super-heater on start up? correct answers prevent dry firing of
the super-heater
What is the purpose of de-superheating? correct answers control temperature of steam
An economizer is a heat-exchanger located in the correct answers gas passage between the boiler
and the stack
On some hot water boilers a three-way mixing valve is used. What is its purpose? correct
answers controls temperature of water circulating in heating system
A hot water boiler is considered to be a high pressure boiler when it: correct answers exceeds
250 degrees and/or 160 psi
, If it is necessary to test the relieving capacity of a safety valve: correct answers an accumulation
test is put on boiler
The switch that proves combustion air and is found in the windbox entering the furnace is correct
answers air switch (sail) switch
An indication of boiler efficiency is obtained from correct answers temperature of exit gases
As the pressure of steam is increased, the volume is correct answers decreased
Before starting a fire, when firing with oil, pulverized fuel, or gas, what precaution must be taken
with a furnace? correct answers 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? correct answers 150%
Assuming all components in a hydronic system are working, what would be the main reason be
for no heat? correct answers air in the system
What is a high temperature water boiler? correct answers 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? correct answers superheater
As the pressure increases, the density of the steam correct answers increases
When stop valves over 2 inches in diameter are used on a boiler, they shall be correct answers
rising stem
