Refex Energy Interview Questions and Answers

In my previous role, I utilized Python and SQL for data analysis, visualization, and reporting to drive business insights.

• Used Python libraries like Pandas and NumPy for data manipulation and cleaning, ensuring data integrity.

• Developed SQL queries to extract and aggregate data from relational databases, enabling efficient reporting.

• Created visualizations using Matplotlib and Seaborn in Python to present findings to sta...read more

Electroplating is a process of depositing a thin layer of metal onto a conductive surface using an electric current.

• Involves immersing the object to be plated in a solution containing metal ions

• Passing an electric current through the solution causes the metal ions to be deposited onto the object

• Commonly used for decorative purposes, corrosion resistance, and improving conductivity

• Examples include chrome plating on car ...read more

Overhauling a PA fan involves systematic dismantling, inspection, repair, and reassembly to ensure optimal performance.

• 1. Dismantling: Carefully remove the fan from its mounting, ensuring all electrical connections are safely disconnected.

• 2. Inspection: Check all components for wear and tear, including bearings, blades, and motor.

• 3. Cleaning: Thoroughly clean all parts to remove dust and debris that could affect perfor...read more

Effective maintenance of coal mill PM ensures optimal performance and longevity of equipment.

• Regular inspection of bearings and lubrication systems to prevent wear and tear.

• Monitoring vibration levels to detect misalignment or imbalance in the mill.

• Checking the condition of grinding elements, such as rollers and tables, for wear.

• Ensuring proper calibration of the mill's control systems for efficient operation.

• Conductin...read more

Servicing a PA fan rotor involves inspection, cleaning, and replacement of key components to ensure optimal performance.

• Inspect rotor blades for wear and damage, ensuring they are free from cracks.

• Clean the rotor assembly to remove dust and debris that can affect performance.

• Check the bearings for lubrication and signs of wear; replace if necessary.

• Examine the rotor shaft for straightness and any signs of corrosion.

• Ens...read more

A working drum elements system is a mechanism that allows for the efficient and effective movement of drums.

• The system should be designed to handle drums of various sizes and weights

• It should include components such as rollers, conveyors, and lifters

• The system should be automated to reduce manual labor and increase productivity

• Regular maintenance and inspections are necessary to ensure the system is functioning properl...read more

Expected CTC should be based on the candidate's experience, skills, and the industry standards.

• Consider the candidate's years of experience in the field

• Take into account the candidate's technical skills and expertise

• Research industry standards for Senior Engineer salaries

• Discuss with the candidate their salary expectations and negotiate if needed