Boiler and Turbine DCS Engineer Interview Questions and Answers

In blackout conditions, I would follow emergency procedures to ensure the safety of the plant and personnel.

• Initiate emergency shutdown procedures

• Activate backup power sources

• Conduct safety checks and inspections

• Communicate with other plant personnel and emergency services

• Restore power and resume operations once the blackout is resolved

Major causes for drum level going low include leaks in the feedwater system, malfunctioning level control valves, and sudden load changes.

• Leaks in the feedwater system can lead to a decrease in drum level.

• Malfunctioning level control valves may not be able to maintain the desired drum level.

• Sudden load changes can cause fluctuations in drum level.

• Foaming or carryover in the boiler can also result in low drum level.

Steam ejector charging procedure involves purging the system with steam to remove air and non-condensable gases.

• Ensure steam ejector is isolated from the system before starting the charging procedure

• Open the steam supply valve to the ejector to allow steam to flow through the system

• Monitor pressure and temperature gauges to ensure proper charging

• Close the steam supply valve once the charging is complete

• Check for any leaks or abnormalities in the system after charging

• Repeat th...read more

Turbine rolling procedure involves slowly rotating the turbine to prevent damage during startup.

• Turbine rolling is done to ensure even heating of components and prevent thermal stress.

• It is important to follow manufacturer's guidelines for speed and duration of rolling.

• Rolling should be done in both directions to prevent uneven wear on bearings.

• Monitoring vibration levels during rolling is crucial to detect any abnormalities.

• Examples: GE turbines recommend rolling at 300 RPM ...read more