4.2 Steam Turbine Auxillaries and Operation

In a turbine circuit, feed heaters and dearators serve to:

The high-pressure oil system of a typical turbine supplies oil to

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

When starting an extraction turbine, sealing steam to the turbine glands is admitted _____ is put in operation

The jacking oil pump is shut down when the turbine reaches a speed of approximately _____ rpm

The overspeed trip a turbine is usually set to trip the mechanism when it reaches ____ of operating speed

Lubricating oil for a turbine may: 1. Lubricate bearings 2. Lubricate gears. 3. Operate throttle valves. 4. Be supplied to a governor.

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

The warm up time required of a turbine is dependant on

Overload governing is used on ______ turbines