CFESA steam practice test
Why will boilers corrode away around the top of the boiler? - answer 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 - answer Nickel is much higher on the
galvanic chart
Why do you need baking soda or soda ash when declaiming boilers? - answer 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? - answer Depends on the rate of
scale build up. But minimum of twice per year.
What is the purpose of a sediment filter? - answer Remove granular debris like fine
sand and grit
A charcoal or carbon filter is used to do what? - answerA 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.
- answerBacteria can begin to grow in the filter after the chlorine is removed.
How does a phosphate feeder work? - answerPhosphate 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 - answerAn 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? - answerRO 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? - answerA lot of
maintenance, including many filter replacements to prevent damage to the membrane.
What is the function of an air vent - answerTo remove air from the boiler
, Can a non functional air vent keep a boiler from heating? - answerYes, 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? -
answerNothing.
What causes water hammer in a steam line - answerWater hammer results when steam
comes in contact with the liquid condensate
What are the two primary functions of a steam trap - answerTo remove air and
condensate
How can air in a steam system act as an insulator? - answerAir 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 - answerTo 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?
- answerTo allow air to pass through the trap.
What is the purpose of the float valve in a float and thermostatic trap? - answerTo open
and allow the condensate to be pushed four of the trap.
When is a float and thermostatic trap most beneficial? - answerWhen steam pressure
varies and there is a large amount of condensate.
How does an inverted bucket trap remove air from the system? - answerIt removes air
through the condensate outlet when the trap opens.
In what ways are inverted bucket traps superior over F & T traps? - answerMore reliable
with dirty steam lines and in cases where water hammer occurs
What is the function of the small orifice hole in the top of the inverted bucket? -
answerTo bleed out the air so the bucket will fall allowing the trap to open.
What happened Sid the orifice of an inverted bucket traps becomes clogged? -
answerThe trap remains closed all the time and condensate can't get out of the system.
How does the pounds per hour rating of a relief valve relate to the BTU of the boiler? -
answerThe minimum pounds per hour rating of the relief valve must be equal to the
BTU of the boiler or pressure vessel divided by 1,000.
Why will boilers corrode away around the top of the boiler? - answer 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 - answer Nickel is much higher on the
galvanic chart
Why do you need baking soda or soda ash when declaiming boilers? - answer 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? - answer Depends on the rate of
scale build up. But minimum of twice per year.
What is the purpose of a sediment filter? - answer Remove granular debris like fine
sand and grit
A charcoal or carbon filter is used to do what? - answerA 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.
- answerBacteria can begin to grow in the filter after the chlorine is removed.
How does a phosphate feeder work? - answerPhosphate 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 - answerAn 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? - answerRO 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? - answerA lot of
maintenance, including many filter replacements to prevent damage to the membrane.
What is the function of an air vent - answerTo remove air from the boiler
, Can a non functional air vent keep a boiler from heating? - answerYes, 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? -
answerNothing.
What causes water hammer in a steam line - answerWater hammer results when steam
comes in contact with the liquid condensate
What are the two primary functions of a steam trap - answerTo remove air and
condensate
How can air in a steam system act as an insulator? - answerAir 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 - answerTo 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?
- answerTo allow air to pass through the trap.
What is the purpose of the float valve in a float and thermostatic trap? - answerTo open
and allow the condensate to be pushed four of the trap.
When is a float and thermostatic trap most beneficial? - answerWhen steam pressure
varies and there is a large amount of condensate.
How does an inverted bucket trap remove air from the system? - answerIt removes air
through the condensate outlet when the trap opens.
In what ways are inverted bucket traps superior over F & T traps? - answerMore reliable
with dirty steam lines and in cases where water hammer occurs
What is the function of the small orifice hole in the top of the inverted bucket? -
answerTo bleed out the air so the bucket will fall allowing the trap to open.
What happened Sid the orifice of an inverted bucket traps becomes clogged? -
answerThe trap remains closed all the time and condensate can't get out of the system.
How does the pounds per hour rating of a relief valve relate to the BTU of the boiler? -
answerThe minimum pounds per hour rating of the relief valve must be equal to the
BTU of the boiler or pressure vessel divided by 1,000.
