LG India Maintenance Engineer Interview: Rounds, Questions and Preparation

What the job involves

A Maintenance Engineer in manufacturing and automobile sectors like LG India ensures that production machinery, utilities, and assembly lines run with minimum downtime. The role involves preventive and breakdown maintenance, root cause analysis, spare part management, and coordination with production and quality teams. Freshers typically start by shadowing senior engineers, handling documentation, and executing scheduled maintenance tasks.

Role and Technical Knowledge

1. 1

   What is the difference between preventive and predictive maintenance? Give an example from an automobile assembly line.

   Explain that preventive is time or usage based (e.g., changing conveyor belts every 500 hours) while predictive is condition based using sensors (e.g., vibration analysis on a motor). Mention how both reduce unplanned downtime.

2. 2

   Explain the working of a PLC in a manufacturing setup. How would you use it for fault finding?

   Cover inputs (sensors, switches), outputs (motors, valves), and ladder logic. For fault finding, mention checking input/output status, forcing bits, and reading error codes on HMI.

3. 3

   What is TPM? Name the eight pillars and how they help a maintenance engineer.

   List the eight pillars (autonomous maintenance, planned maintenance, quality maintenance, etc.) and explain how they reduce breakdowns and involve operators in daily care.

4. 4

   What are the common causes of overheating in an induction motor used on a production line?

   Mention overload, poor ventilation, voltage imbalance, bearing failure, and frequent starts. Add that checking current draw, cleaning cooling fins, and lubricating bearings are first steps.

Practical Scenarios

1. 5

   A critical conveyor motor trips repeatedly during peak production. How do you troubleshoot and minimise downtime?

   Start with safety isolation, then check overload relay, current, belt tension, and load. Suggest temporary backup or manual operation while fixing, and document root cause after restart.

2. 6

   You notice a hydraulic oil leak under a press machine. What steps do you take from detection to repair?

   Include isolating the machine, placing drip trays, identifying the leak source (fittings, seals, hoses), replacing damaged parts, topping up oil, and checking pressure after repair.

3. 7

   How would you plan and execute a preventive maintenance shutdown for a welding robot cell?

   Cover scheduling with production, preparing checklist and spares, locking out energy sources, inspecting cables, torches, and cooling systems, then testing and documenting completion.

4. 8

   The spare part you need for a breakdown is not in stock. What do you do?

   Suggest checking alternative vendors or nearby plants, using a temporary substitute if safe, escalating to the maintenance head, and later updating the minimum stock level in CMMS.

Behavioural and Situational

1. 9

   Tell me about a time you worked under pressure to fix a problem. What was the outcome?

   Use STAR method: describe the situation (e.g., college project deadline or machine breakdown during internship), your action (prioritised tasks, asked for help), and result (fixed on time, learned lesson).

2. 10

   How do you handle a situation where a production supervisor insists on running a machine you have tagged as unsafe?

   Emphasise safety first, politely explain the risk, involve your senior or safety officer, and refuse to bypass lockout-tagout. Show that you can communicate without conflict.

3. 11

   Describe a time you made a mistake during maintenance. What did you learn?

   Be honest about a small error (e.g., wrong torque, missed step), explain how you corrected it, and highlight the new check you added to avoid repetition.

4. 12

   How do you keep yourself updated with new maintenance technologies and practices?

   Mention reading technical manuals, online courses, YouTube channels on PLC or hydraulics, and asking seniors. Show curiosity and willingness to learn on the job.

HR and Company Fit

1. 13

   Why do you want to work as a Maintenance Engineer in a manufacturing company like LG India?

   Connect your interest in hands-on problem solving and large-scale production. Mention LG's reputation for quality and innovation, and your desire to learn world-class maintenance systems.

2. 14

   Are you comfortable working in rotating shifts, including night shifts, and in a factory environment?

   Answer clearly yes, and give a reason such as exposure to different breakdown patterns and learning opportunities. Show flexibility and reliability.

3. 15

   Where do you see yourself in three years as a maintenance engineer?

   Focus on becoming a subject matter expert in one area (e.g., automation or utilities), leading a small team, and contributing to reducing downtime through data-driven maintenance.

4. 16

   What do you know about LG India's manufacturing operations and products?

   Mention that LG India makes home appliances, TVs, and air conditioners, and has plants in Noida, Pune, and other locations. Show that you researched the company's focus on smart technology and quality.