10+ O&M Engineer Interview Questions and Answers

Utility load shifting to DG manually involves following a standard operating procedure (SOP) to ensure smooth transition.

• Ensure DG is in good working condition before shifting load

• Isolate utility power source before transferring load to DG

• Monitor DG performance during load shifting process

• Gradually shift load to DG to prevent overload

• Regularly check and maintain DG for optimal performance

Maintaining incident involves documenting, analyzing, and resolving issues to prevent recurrence. RCA stands for Root Cause Analysis.

• Document all incidents in a log with details of what happened and how it was resolved

• Analyze incidents to identify the root cause using techniques like 5 Whys or Fishbone Diagram

• Implement corrective actions to prevent similar incidents from happening in the future

• Regularly review incident logs and RCA findings to improve processes and prevent re...read more

Temperature refers to the degree of hotness or coldness of a body or environment, while humidity is the amount of water vapor present in the air.

• Temperature is measured in degrees Celsius or Fahrenheit, while humidity is measured in percentage.

• Temperature affects how hot or cold we feel, while humidity affects how sticky or dry the air feels.

• High temperature with high humidity can make it feel hotter than it actually is, known as the heat index.

• Low temperature with high humid...read more

DFIG stands for Doubly Fed Induction Generator. It is a type of generator used in wind turbines.

• DFIG is a type of induction generator used in wind turbines

• It has two sets of windings - one connected to the grid and the other connected to a converter

• The converter controls the power flow between the grid and the generator, allowing for variable speed operation

• DFIG is popular in wind energy applications due to its ability to provide reactive power support and grid stability

Electrical safety refers to practices and measures taken to prevent electrical hazards and accidents.

• Ensuring proper grounding of electrical systems

• Using insulated tools and equipment

• Implementing lockout/tagout procedures before working on electrical systems

• Regular inspection and maintenance of electrical equipment

• Training employees on electrical safety protocols

• Following national and local electrical codes and regulations

Transformers work by converting electrical energy from one voltage level to another through electromagnetic induction.

• Transformers consist of two coils of wire, known as the primary and secondary coils, wrapped around a core made of iron or steel.

• When an alternating current flows through the primary coil, it creates a changing magnetic field which induces a voltage in the secondary coil.

• The ratio of the number of turns in the primary and secondary coils determines the voltage...read more

SFS system stands for Safety Instrumented System, which is designed to prevent accidents by taking actions to maintain a safe state.

• SFS system is a critical part of process industries to ensure safety.

• It consists of sensors, logic solvers, and final control elements.

• The system continuously monitors the process and activates safety measures if necessary.

• Example: Emergency shutdown systems in oil refineries use SFS principles to prevent accidents.

The yaw system in wind turbines adjusts the angle of the rotor blades to optimize energy production by facing into the wind.

• Yaw system helps the wind turbine face into the wind for maximum energy production

• It consists of sensors to detect wind direction, a controller to adjust blade angle, and a yaw drive to rotate the nacelle

• The yaw system ensures the rotor blades are always perpendicular to the wind direction

Yaw is typically done during commissioning or maintenance of wind turbines to ensure proper alignment with the wind direction.

• Yaw is typically done during commissioning of a wind turbine to ensure it is properly aligned with the wind direction

• Yaw may also be done during maintenance to check and adjust the alignment if needed

• During yaw, the nacelle of the wind turbine is rotated to face the wind direction for optimal energy production