4687969
Description
Quiz by TRAVIS CANNING, updated more than 1 year ago
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Created by TRAVIS CANNING
about 8 years ago
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|
Question 1
Question
In a turbine circuit, feed heaters and dearators serve to:
Answer
-
use up excess steam
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Increase efficiency
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Provide load during low demand periods
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Increase turbine output
Question 2
Question
The high-pressure oil system of a typical turbine supplies oil to
Answer
-
Bearings
-
Gears
-
Emergency stop valves
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The oil purifier
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The auxillary oil pump
Question 3
Question
When starting a condensing or extraction turbine, the extraction (condensate)pump is started ______ the _____
1. before
2. after
3. air ejector
4. jacking oil pump
5. condenser circulating water pump
Answer
-
1,3
-
2,3
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1,4
-
1,5
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2,5
Question 4
Question
When starting an extraction turbine, sealing steam to the turbine glands is admitted _____ is put in operation
Answer
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Before the extraction pump
-
Before the condenser circulating water pump
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After the air ejector
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After the extraction pump
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After the throttle valve is open
Question 5
Question
The jacking oil pump is shut down when the turbine reaches a speed of approximately _____ rpm
Answer
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5-10
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20-30
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40-50
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50-60
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0-80
Question 6
Question
The overspeed trip a turbine is usually set to trip the mechanism when it reaches ____ of operating speed
Answer
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100%
-
105%
-
110%
-
115%
-
120%
Question 7
Question
Lubricating oil for a turbine may:
1. Lubricate bearings
2. Lubricate gears.
3. Operate throttle valves.
4. Be supplied to a governor.
Answer
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1,2
-
3,4
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1,2,3
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2,3,4
-
1,2,3,4
Question 8
Question
When a hydraulic overspeed trip operates
1. High pressure oil forces the main steam valve shut.
2. High pressure oil supply is shut off
3. The stop valve oil cylinder drain is closed.
4. The stop valve oil cylinder drain is opened
5. A spring closes the main steam valve
6. The pilot drain is closed
Answer
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1,3,6
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2,4,5
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3,4,6
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2,4,6
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3,4,5
Question 9
Question
The warm up time required of a turbine is dependant on
Answer
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How quickly the turbine is required
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The manufacturers instructions
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The size of the turbine
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The type of turbine
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Whether the steam is dry or wet
Question 10
Question
Overload governing is used on ______ turbines
Answer
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Small
-
Impulse
-
Low pressure
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Reaction
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Impulse and Reaction
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