PPS SEMI FINAL QUIZ 3.2D-3.3

What is the primary purpose of an emergency shutdown (ETS) in a turbine power plant?

• To speed up turbine operations

• To immediately stop the flow of steam and prevent turbine damage

• To increase power output

• To reduce condenser vacuum

Which of the following conditions would NOT typically trigger an emergency shutdown?

• High bearing temperature

• Normal oil sump levels

• Excessive turbine vibration

• Fire in the turbine hall

What action should an operator take first when performing a manual turbine trip?

• Check the rotor deceleration

• Press the Emergency Stop Button

• Start the post-trip cooling procedures

• Engage the turning gear

What role does the turning gear play during an emergency shutdown procedure?

• Stops steam flow immediately

• Increases turbine speed

• Ensures even cooling by slowly rotating the turbine rotor

• Reduces lubricating oil temperature

Which component is responsible for instantly cutting off steam flow during a turbine emergency trip?

• Turning gear

• Oil sump

• Trip valve

• Condenser vacuum pump

If the condenser vacuum alarm is triggered, which response is most appropriate?

• Decrease oil flow to bearings

• Investigate for possible air ingress and cooling water issues

• Activate the turning gear immediately

• Increase turbine speed to compensate

Why is it important to monitor oil supply to bearings throughout the shutdown process?

• To increase turbine speed

• To prevent heat damage and ensure proper lubrication

• To maintain steam flow

• To reduce rotor deceleration

What should an operator do after the turbine has come to a complete stop?

• Initiate post-trip cooling procedures

• Restart the turbine

• Manually open the steam stop valves

• Increase generator output

After a turbine trip, which key information should be reviewed in the trip log to diagnose the cause?

• Rotor speed only

• Condenser vacuum levels only

• System pressures, temperatures, and vibration levels

• Oil color

Which of the following is NOT part of the post-shutdown inspection checklist?

• Visual inspection of bearings

• Reactivation of the Emergency Stop Button

• Oil quality testing

• Vibration analysis