10+ Navsahyadri Education Society Interview Questions and Answers

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

AC motor speed can be controlled using methods like voltage control, frequency control, and pole changing.

• Voltage control: Adjusting the voltage supplied to the motor to change its speed.

• Frequency control: Changing the frequency of the AC power supplied to the motor to control its speed.

• Pole changing: Altering the number of poles in the motor to adjust its speed.

• Using variable frequency drives (VFDs) for precise speed control.

Material science involves the study of the properties and applications of materials.

• Study of structure, properties, processing, and performance of materials

• Focus on understanding how different materials can be used in various applications

• Involves research on metals, ceramics, polymers, and composites

• Application of principles in designing new materials for specific purposes

To startup a plant safely, follow proper procedures, conduct safety checks, and ensure all equipment is functioning correctly.

• Follow startup procedures outlined in the plant's operating manual

• Conduct safety checks to ensure all systems are functioning properly

• Ensure all equipment is properly calibrated and functioning correctly

• Train all personnel on safety procedures and emergency protocols

• Have a contingency plan in place in case of emergencies

• Monitor the startup process clos...read more

My favourite subject is computer science because I enjoy problem-solving and coding.

• I love learning about algorithms and data structures

• I enjoy programming languages like Python and Java

• I find cybersecurity and network security fascinating