MINNESOTA SPECIAL ENGINEER BOILER UPDATED FINAL
PAPER QUESTIONS AND SOLUTIONS RATED A+
✔✔What is the purpose of the expansion tank? - ✔✔To provide for expansion and
contraction of the water volume as its temperature varies.
✔✔On a hot water boiler, what is the purpose of the vent valve? - ✔✔To make sure
there is water inside the boiler and to vent any trapped air.
✔✔If the safety valve or ASME safety relief valve leaks you would do what? - ✔✔Have
the valve repaired or replaced.
✔✔Tri cocks or gauge cocks are sued on a steam boiler to indicate? - ✔✔The true
water level inside the boiler.
✔✔On a steam or hot water boiler, the safety valve or safety relief valve could be tested
by? - ✔✔When the boiler is running lifting the lever on the valve or raising the pressure
until they operate.
✔✔Before starting a steam or hot water boiler you should check for what? - ✔✔Water in
the boiler.
✔✔True or False: Bottom blow down valves are used for both steam and hot water. -
✔✔True
✔✔Safety valves or safety relief valves should be manually tested at least...? -
✔✔Monthly
✔✔The low water cut out is one of the most important electrical/mechanical devices on
your boiler. How often should you test it? - ✔✔Daily
✔✔What device must be located between a hot water boiler and the expansion tank? -
✔✔A shut off valve so the expansion can be isolated and drained during operation of
the boiler.
✔✔On a hot water boiler, every time the burner operates the safety relief valve opens.
Why? - ✔✔The expansion tank is water logged, or the isolating valve for the expansion
tank is closed.
✔✔An Aquastat is used on a...? - ✔✔Hot water boiler
✔✔To reduce thermal shock on hot water boilers, what devices are used? - ✔✔Low
limit or low fire hold control, three way valve, run around pump.
, ✔✔On a steam boiler the control named operator will... - ✔✔On pressure decrease:
Start. On pressure increase: Stop.
✔✔On a hot water boiler the control called the operator will... - ✔✔On temperature
decrease: Start. On temperature increase: Stop.
✔✔On a steam boiler what is a siphon or pigtail used for? - ✔✔To protect the steam
gauge from too high of temperature.
✔✔What is one reason causing the expansion tank to fill with water? - ✔✔Air leaks from
the gauge glass fitting.
✔✔What would you do if you cam into a boiler room and found no water in the boiler? -
✔✔Shut off the burner and allow boiler to cool.
✔✔What is the purpose of the bottom blow down on a steam boiler? - ✔✔To remove
sludge and sediment and to drain the boiler.
✔✔When blowing down the water column the water should do what? - ✔✔Refill the
gauge glass quickly.
✔✔When doing the annual boiler inspection the boiler should... - ✔✔Water and fire side
cleaned and inspection ports open.
✔✔Purging is part of what cycle? - ✔✔Firing cycle
✔✔All steam traps will prevent steam from passing through them but will allow what to
pass through them? - ✔✔Dirt, air, and condensate.
✔✔How do we know if we are using and approved safety valve for a steam boiler or a
safety relief valve for a hot water boiler? - ✔✔A spring loaded direct acting safety valve
or safety relief valve.
✔✔Before testing a low water fuel cut-out what must be done? - ✔✔The burner must be
on.
✔✔Heat can be transferred in how many ways? - ✔✔Three.
✔✔Aqua stats work by sensing: - ✔✔Temperature.
✔✔Name the different ways heat can be transferred and give a definition of each way. -
✔✔Radiation, Conduction, Convection
PAPER QUESTIONS AND SOLUTIONS RATED A+
✔✔What is the purpose of the expansion tank? - ✔✔To provide for expansion and
contraction of the water volume as its temperature varies.
✔✔On a hot water boiler, what is the purpose of the vent valve? - ✔✔To make sure
there is water inside the boiler and to vent any trapped air.
✔✔If the safety valve or ASME safety relief valve leaks you would do what? - ✔✔Have
the valve repaired or replaced.
✔✔Tri cocks or gauge cocks are sued on a steam boiler to indicate? - ✔✔The true
water level inside the boiler.
✔✔On a steam or hot water boiler, the safety valve or safety relief valve could be tested
by? - ✔✔When the boiler is running lifting the lever on the valve or raising the pressure
until they operate.
✔✔Before starting a steam or hot water boiler you should check for what? - ✔✔Water in
the boiler.
✔✔True or False: Bottom blow down valves are used for both steam and hot water. -
✔✔True
✔✔Safety valves or safety relief valves should be manually tested at least...? -
✔✔Monthly
✔✔The low water cut out is one of the most important electrical/mechanical devices on
your boiler. How often should you test it? - ✔✔Daily
✔✔What device must be located between a hot water boiler and the expansion tank? -
✔✔A shut off valve so the expansion can be isolated and drained during operation of
the boiler.
✔✔On a hot water boiler, every time the burner operates the safety relief valve opens.
Why? - ✔✔The expansion tank is water logged, or the isolating valve for the expansion
tank is closed.
✔✔An Aquastat is used on a...? - ✔✔Hot water boiler
✔✔To reduce thermal shock on hot water boilers, what devices are used? - ✔✔Low
limit or low fire hold control, three way valve, run around pump.
, ✔✔On a steam boiler the control named operator will... - ✔✔On pressure decrease:
Start. On pressure increase: Stop.
✔✔On a hot water boiler the control called the operator will... - ✔✔On temperature
decrease: Start. On temperature increase: Stop.
✔✔On a steam boiler what is a siphon or pigtail used for? - ✔✔To protect the steam
gauge from too high of temperature.
✔✔What is one reason causing the expansion tank to fill with water? - ✔✔Air leaks from
the gauge glass fitting.
✔✔What would you do if you cam into a boiler room and found no water in the boiler? -
✔✔Shut off the burner and allow boiler to cool.
✔✔What is the purpose of the bottom blow down on a steam boiler? - ✔✔To remove
sludge and sediment and to drain the boiler.
✔✔When blowing down the water column the water should do what? - ✔✔Refill the
gauge glass quickly.
✔✔When doing the annual boiler inspection the boiler should... - ✔✔Water and fire side
cleaned and inspection ports open.
✔✔Purging is part of what cycle? - ✔✔Firing cycle
✔✔All steam traps will prevent steam from passing through them but will allow what to
pass through them? - ✔✔Dirt, air, and condensate.
✔✔How do we know if we are using and approved safety valve for a steam boiler or a
safety relief valve for a hot water boiler? - ✔✔A spring loaded direct acting safety valve
or safety relief valve.
✔✔Before testing a low water fuel cut-out what must be done? - ✔✔The burner must be
on.
✔✔Heat can be transferred in how many ways? - ✔✔Three.
✔✔Aqua stats work by sensing: - ✔✔Temperature.
✔✔Name the different ways heat can be transferred and give a definition of each way. -
✔✔Radiation, Conduction, Convection
