CFESA Steam Practice Test - Questions And Detailed
Answers
Why will boilers corrode away around the top of the boiler? Right Ans - A
result of single metal corrosion from the oxygen sippy being cut off ti thr steel
by scale build up
How can nickel plated boilers prevent corrosion Right Ans - Nickel is much
higher on the galvanic chart
Why do you need baking soda or soda ash when deliming boilers? Right
Ans - To neutralize the acid used for deliming, and to keep the acid from
remaining in pits or scratches inside the boiler shell
How often should a boiler be opened and inspected? Right Ans - Depends
on the rate of scale build up. But minimum of twice per year.
What is the purpose of a sediment filter? Right Ans - Remove granular
debris like fine sand and grit
A charcoal or carbon filter is used to do what? Right Ans - A charcoal filter
is used to remove chlorine, taste and odor from water.
When using charcoal filters, why is it so critical that they be changed at
regular intervals. Right Ans - Bacteria can begin to grow in the filter after
the chlorine is removed.
How does a phosphate feeder work? Right Ans - Phosphate produces a thin
film on piping, valves, fitting and controls. This film keeps the hard minerals
from adhering to their surfaces.
Describe the operation of an ion exchange water softener Right Ans - An
ion exchange water softener passes water through a resin core that is
impregnated with salt as the water passes through the core, the hard water
mineral ions are collected in the core and replaced with soft sodium ions.
, What are the major disadvantages to reverse osmosis systems? Right Ans -
RO systems are very slow to produce pure water and wastes a lot of water
flushing the membrane.
How much maintenance is required for reverse osmosis systems? Right
Ans - A lot of maintenance, including many filter replacements to prevent
damage to the membrane.
What is the function of an air vent Right Ans - To remove air from the
boiler
Can a non functional air vent keep a boiler from heating? Right Ans - Yes, if
the incoming water pressure compresses the air enough, the high pressure
limit control could keep the boiler from heating.
What is the difference between a thermostatic steam trap and a thermostatic
vent? Right Ans - Nothing.
What causes water hammer in a steam line Right Ans - Water hammer
results when steam comes in contact with the liquid condensate
What are the two primary functions of a steam trap Right Ans - To remove
air and condensate
How can air in a steam system act as an insulator? Right Ans - Air trapped
in a system keeps the steam from having direct contact with the surface and
acts as an insulator.
What is the purpose of a steam separator Right Ans - To remove excess
condensate from the steam supply line when the remote house boilers are
located too far away.
What is the function of the thermostatic element in a float and thermostatic
steam trap? Right Ans - To allow air to pass through the trap.
What is the purpose of the float valve in a float and thermostatic trap?
Right Ans - To open and allow the condensate to be pushed four of the trap.
Answers
Why will boilers corrode away around the top of the boiler? Right Ans - A
result of single metal corrosion from the oxygen sippy being cut off ti thr steel
by scale build up
How can nickel plated boilers prevent corrosion Right Ans - Nickel is much
higher on the galvanic chart
Why do you need baking soda or soda ash when deliming boilers? Right
Ans - To neutralize the acid used for deliming, and to keep the acid from
remaining in pits or scratches inside the boiler shell
How often should a boiler be opened and inspected? Right Ans - Depends
on the rate of scale build up. But minimum of twice per year.
What is the purpose of a sediment filter? Right Ans - Remove granular
debris like fine sand and grit
A charcoal or carbon filter is used to do what? Right Ans - A charcoal filter
is used to remove chlorine, taste and odor from water.
When using charcoal filters, why is it so critical that they be changed at
regular intervals. Right Ans - Bacteria can begin to grow in the filter after
the chlorine is removed.
How does a phosphate feeder work? Right Ans - Phosphate produces a thin
film on piping, valves, fitting and controls. This film keeps the hard minerals
from adhering to their surfaces.
Describe the operation of an ion exchange water softener Right Ans - An
ion exchange water softener passes water through a resin core that is
impregnated with salt as the water passes through the core, the hard water
mineral ions are collected in the core and replaced with soft sodium ions.
, What are the major disadvantages to reverse osmosis systems? Right Ans -
RO systems are very slow to produce pure water and wastes a lot of water
flushing the membrane.
How much maintenance is required for reverse osmosis systems? Right
Ans - A lot of maintenance, including many filter replacements to prevent
damage to the membrane.
What is the function of an air vent Right Ans - To remove air from the
boiler
Can a non functional air vent keep a boiler from heating? Right Ans - Yes, if
the incoming water pressure compresses the air enough, the high pressure
limit control could keep the boiler from heating.
What is the difference between a thermostatic steam trap and a thermostatic
vent? Right Ans - Nothing.
What causes water hammer in a steam line Right Ans - Water hammer
results when steam comes in contact with the liquid condensate
What are the two primary functions of a steam trap Right Ans - To remove
air and condensate
How can air in a steam system act as an insulator? Right Ans - Air trapped
in a system keeps the steam from having direct contact with the surface and
acts as an insulator.
What is the purpose of a steam separator Right Ans - To remove excess
condensate from the steam supply line when the remote house boilers are
located too far away.
What is the function of the thermostatic element in a float and thermostatic
steam trap? Right Ans - To allow air to pass through the trap.
What is the purpose of the float valve in a float and thermostatic trap?
Right Ans - To open and allow the condensate to be pushed four of the trap.
