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Process Technology Equipment, 2e (NAPTA)
Chapter 14 Boilers
1) What component of a boiler injects air and fuel through a distribution system that mixes them
in proper concentrations, so combustion can occur?
A) Burners
B) Boiler feedwater system
C) Economizer
D) Steam distribution system
2) What key component of a natural gas burner removes liquids and condensate from the fuel
before it is sent to the burners?
A) Spiders
B) Impellers
C) Igniters
D) Knockout pots
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3) What key component of a natural gas burner is used to inject fuel into the boiler?
A) Spiders
B) Impellers
C) Igniters
D) Knockout pots
4) Which of the following is one of the most common steam trap designs?
A) Functional trap
B) Mechanical trap
C) Pressure trap
D) Physical trap
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5) Which of the following is the cold-water line in a water tube boiler?
A) Riser tube
B) Radiant tube
C) Downcomer tube
D) Superheated tube
6) What component of a water tube boiler is used to supply combustion air to the burners?
A) Air register
B) Draft fans
C) Desuperheater
D) Burners
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7) What component of a water tube boiler introduces, distributes, mixes, and burns a fuel for
heat?
A) Air register
B) Draft fans
C) Desuperheater
D) Burners
8) On which principle is the circulation of boiler water based?
A) Conduction
B) Radiation
C) Convection
D) Distribution
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9) What type of steam is in equilibrium with water?
A) Boiler steam
B) Saturated steam
C) Superheated steam
D) Desuperheated steam
10) What water treatment method removes coarse suspended matter and sludge from coagulation
or from water softening systems?
A) Softening
B) Coagulation
C) Deaeration
D) Filtration
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11) What water treatment method removes oxygen or other gases from boiler feedwater by
increasing the temperature and boiling out the dissolved gases?
A) Softening
B) Coagulation
C) Deaeration
D) Filtration
12) What problem can be caused by burner flame impingement or poor flame distribution?
A) Overheating
B) Power outage
C) Increased soot deposits
D) Formation of scale in the tubes
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13) What can cause a loss of pumps and blowers?
A) Overheating
B) Power outage
C) Increased soot deposits
D) Formation of scale in the tubes
14) What types of boiler equipment are most subject to failure due to aging?
A) Stacks
B) Dampers
C) Air registers
D) Boiler feedwater pumps
15) Which of the following hazards can cause flame impingement?
A) Failing to purge the firebox
B) Poor control of excess air
C) Loss of boiler feedwater
D) Loss of fuel gas or oil
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16) Which of the following hazards can cause tube rupture?
A) Failing to purge the firebox
B) Poor control of excess air
C) Loss of boiler feedwater
D) Loss of fuel gas or oil
17) What is the most potentially hazardous operation in steam generation?
A) Start-up
B) Shutdown
C) Maintenance
D) Inspection
18) Which of the following should process technicians look for when maintaining a boiler?
A) Flame impingement
B) Wall hot spots
C) Draft balance
D) All of the above
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19) What noise can indicate improper draft operation?
A) Squeaking
B) Screeching
C) Huffing
D) Squealing
20) Which of the following is NOT a step in the typical start-up procedure of a boiler?
A) Inspect the outside of the boiler for loose flanges.
B) Inspect the condition of the draft fan.
C) Shut off the steam.
D) Open the fuel gas supply to the burner and the pilot gas block valves.
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21) What should you do in an emergency situation with a boiler?
A) Shut off the draft fan
B) Close the damper
C) Turn off the main shutoff valve
D) All of the above
