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Test

4.2 Steam Turbine Auxillaries and Operation

TRAVIS CANNING 10 preguntas Actualizado el 1 may 2016

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Preguntas del test (10)

  1. 1In a turbine circuit, feed heaters and dearators serve to:
    1. Ause up excess steam
    2. BIncrease efficiency
    3. CProvide load during low demand periods
    4. DIncrease turbine output
  2. 2The high-pressure oil system of a typical turbine supplies oil to
    1. ABearings
    2. BGears
    3. CEmergency stop valves
    4. DThe oil purifier
    5. EThe auxillary oil pump
  3. 3When 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
    1. A1,3
    2. B2,3
    3. C1,4
    4. D1,5
    5. E2,5
  4. 4When starting an extraction turbine, sealing steam to the turbine glands is admitted _____ is put in operation
    1. ABefore the extraction pump
    2. BBefore the condenser circulating water pump
    3. CAfter the air ejector
    4. DAfter the extraction pump
    5. EAfter the throttle valve is open
  5. 5The jacking oil pump is shut down when the turbine reaches a speed of approximately _____ rpm
    1. A5-10
    2. B20-30
    3. C40-50
    4. D50-60
    5. E0-80
  6. 6The overspeed trip a turbine is usually set to trip the mechanism when it reaches ____ of operating speed
    1. A100%
    2. B105%
    3. C110%
    4. D115%
    5. E120%
  7. 7Lubricating oil for a turbine may:
    1. Lubricate bearings
    2. Lubricate gears.
    3. Operate throttle valves.
    4. Be supplied to a governor.
    1. A1,2
    2. B3,4
    3. C1,2,3
    4. D2,3,4
    5. E1,2,3,4
  8. 8When 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
    1. A1,3,6
    2. B2,4,5
    3. C3,4,6
    4. D2,4,6
    5. E3,4,5
  9. 9The warm up time required of a turbine is dependant on
    1. AHow quickly the turbine is required
    2. BThe manufacturers instructions
    3. CThe size of the turbine
    4. DThe type of turbine
    5. EWhether the steam is dry or wet
  10. 10Overload governing is used on ______ turbines
    1. ASmall
    2. BImpulse
    3. CLow pressure
    4. DReaction
    5. EImpulse and Reaction

Información

Descripción
power engineering 3b2 Test sobre 4.2 Steam Turbine Auxillaries and Operation, creado por TRAVIS CANNING el 29/02/2016.
Idioma
English
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43
Historial
Creado el 29 feb 2016 · actualizado el 1 may 2016
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