| Performance
Objectives: |
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Pass |
Fail |
| Topic
1: Water |
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| 1.1
State the purpose of water circulation in a
boiler. |
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| 1.2
Describe the water flow path through a
drum-type boiler at your site. |
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| 1.3
Describe the basic principle of natural
circulation and name two factors that
affect natural circulations. |
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| 1.4
Describe the differences between natural
circulation and controlled circulation.
State which is used in the boilers at your
site and describe the flow path through
one of the boilers. |
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| 1.5
Describe the functions of a boiler drum
and name its components. |
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| Topic
2: Steam |
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| 2.1
Define the following terms: boiling,
saturation temperature, and superheat. |
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| 2.2
Describe the steam flow path from the
boiler to the condenser in a generating
unit at your site. |
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| 2.3
State the function of a superheater and
describe how superheaters are classified. |
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| 2.4
State the function of a desuperheater.
State the function of a reheater and describe
how reheaters are classified. |
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| 2.5
Describe the basic operation of a con-
denser. Identify a condenser used at your
site and trace the paths of cooling water
and condensate. |
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| Topic
3: Supercritical Boilers |
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| 3.1
Define the term “Critical Point” and explain
why some boilers operate above the critical
point. |
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| 3.2
Describe the flow path of water in a once-
through boiler at your site. |
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| 3.3
State the advantages and disadvantages of
a once-through supercritical boiler. |
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| 3.4
Explain how steam pressure is maintained
in a drum-type boiler and a once-through
boiler at your site. |
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