3B2 - Ultimate ABSA Study Guide C1-15 | Comprehensive Q&A For Certification Success

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3B2 - Ultimate ABSA Study Guide C1-15 |
Comprehensive Q&A For Certification
Success

A speed sensitive governor may be:
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1. Proportional.
2. Mechanical.
3. Mechanical-hydraulic.
4. Electronic-hydraulic.
a. 1,2
b. 3,4
c. 1,2,3
d. 2,3,4
e. 1,2,3,4. -correct-answer-D
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In a mechanical-hydraulic governor system, what is the purpose of the auxiliary oil
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Mpump?
a. It provides oil pressure in case of a main pump failure.
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b. It provides oil pressure to the bearings.
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c. It provides oil pressure to the governor system.
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d. It provides oil pressure during start-up of the turbine.
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e. It boosts the main pump's pressure. -correct-answer-D
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An electronic-hydraulic governor system uses:
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a. High pressure oil from the turbine oil system.
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b. A separate fluid power unit for high pressure oil.
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c. Oil pressure of approximately 3000-4000 kPa.
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d. Pressure oil from the turbine oil system and boosts it to
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approximately 8200-11000 kPa.
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e. Flyweights similar to a mechanical-hydraulic governor. -correct-answer-B
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A mechanical overspeed trip is designed to
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condition.
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a. Prevent the turbine's speed from exceeding 150% of its rated speed.
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b. Activate an alarm. M M




c. Drop the turbine's load. M M M




d. Shut off the turbine's steam supply.
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e. Throttle the inlet steam. -correct-answer-D
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When starting a large condensing or extraction turbine, the lubricating oil pump is
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usually started:
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a. Just before the turbine is rotated.
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b. One half hour before the turbine is rotated.
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c. 2-3 hours before the turbine is rotated.
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d. 6-8 hours before the turbine is rotated.
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e. The pump is left running at all times. -correct-answer-C
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The extraction (condensate) pump is put into operation
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1. Before.
2. After . M




3. Air ejector. M




4. Jack oil pump. M M




5. Condenser circulating water pump. M M M




a. 1, 3 M




b. 2, 3 M




c. 1, 4
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d. 1, 5 M




e. 2, 5. -correct-answer-A
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When starting a turbine, a speed of 200-300 rpm is maintained for what purpose?
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a. To allow the barring gear time to disengage.
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b. To allow the operator time to listen for rubbing or other
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unusual noises.
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c. To ensure all controls are functioning.
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d. To warm up the rotor and casing.
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e. To ensure the lube oil system is operating correctly. -correct-answer-D
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The warm-up time required of a turbine is dependant on:
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a. How quickly the turbine is required.
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b. The manufacturer's instructions.
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c. The size of the turbine.
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d. The type of turbine.
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e. Whether the steam is dry or wet. -correct-answer-C
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When shutting down a turbine, the first thing done is:
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a. Turn off the lube oil cooling water.
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b. Test the emergency trip.
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c. Start the auxiliary oil pump.
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d. Shut off the steam supply.
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e. Reduce the load to zero. -correct-answer-E
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Sealing steam to the turbine glands is admitted
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a. Before the extraction pump.
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b. Before the condenser circulating water pump.
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