MN Boiler Operator Exam Prep 1A +
Chief Questions and Answers Rated
100% Correct
What is meant by A.S.M.E.? correct 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? correct answer - Code Administration and Inspection Services (Boiler
Inspection)
A steam flow meter measures? correct answer - quantity of steam
Why are water tube boilers considered less dangerous than fire tube boilers? correct answer -
contain less water
What is the purpose of flooding a super-heater on start up? correct answer - prevent dry firing
of the super-heater
What is the purpose of de-superheating? correct answer - control temperature of steam
An economizer is a heat-exchanger located in the correct 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? correct
answer - controls temperature of water circulating in heating system
, A hot water boiler is considered to be a high pressure boiler when it: correct answer - exceeds
250 degrees and/or 160 psi
If it is necessary to test the relieving capacity of a safety valve: correct answer - an
accumulation test is put on boiler
The switch that proves combustion air and is found in the windbox entering the furnace is
correct answer - air switch (sail) switch
An indication of boiler efficiency is obtained from correct answer - temperature of exit gases
As the pressure of steam is increased, the volume is correct answer - decreased
Before starting a fire, when firing with oil, pulverized fuel, or gas, what precaution must be
taken with a furnace? correct 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? correct answer - 150%
Assuming all components in a hydronic system are working, what would be the main reason be
for no heat? correct answer - air in the system
What is a high temperature water boiler? correct 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? correct answer - superheater
Chief Questions and Answers Rated
100% Correct
What is meant by A.S.M.E.? correct 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? correct answer - Code Administration and Inspection Services (Boiler
Inspection)
A steam flow meter measures? correct answer - quantity of steam
Why are water tube boilers considered less dangerous than fire tube boilers? correct answer -
contain less water
What is the purpose of flooding a super-heater on start up? correct answer - prevent dry firing
of the super-heater
What is the purpose of de-superheating? correct answer - control temperature of steam
An economizer is a heat-exchanger located in the correct 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? correct
answer - controls temperature of water circulating in heating system
, A hot water boiler is considered to be a high pressure boiler when it: correct answer - exceeds
250 degrees and/or 160 psi
If it is necessary to test the relieving capacity of a safety valve: correct answer - an
accumulation test is put on boiler
The switch that proves combustion air and is found in the windbox entering the furnace is
correct answer - air switch (sail) switch
An indication of boiler efficiency is obtained from correct answer - temperature of exit gases
As the pressure of steam is increased, the volume is correct answer - decreased
Before starting a fire, when firing with oil, pulverized fuel, or gas, what precaution must be
taken with a furnace? correct 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? correct answer - 150%
Assuming all components in a hydronic system are working, what would be the main reason be
for no heat? correct answer - air in the system
What is a high temperature water boiler? correct 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? correct answer - superheater
