ExxonMobil Electrical Engineer Interview Questions and Answers

Q1. Technical questions
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Q1. Interview questions
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Q1. What is an electrical panel?
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An electrical panel is a metal box that contains electrical circuit breakers or fuses to control the flow of electricity in a building.
• Controls the distribution of electricity throughout a building

• Contains circuit breakers or fuses to protect circuits from overloads

• Typically located in a utility room or basement

• May have labels indicating which circuits are connected to each breaker
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Q2. What are the best practices for electrical motor maintenance?
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Regular inspection, cleaning, lubrication, and testing are key practices for electrical motor maintenance.
• Regularly inspect motor for signs of wear or damage

• Keep motor clean and free of dust and debris

• Lubricate moving parts as recommended by manufacturer

• Test motor performance regularly to detect any issues early

• Follow proper storage and handling procedures when not in use
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Q3. Capacitor bank maintenance
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Q4. Grids maintenance
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Q5. Electrical panel diagrams
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Q1. Electrical engineering
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Q2. Maintenance engineer
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Q1. How to Erection and testing transformers
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Erection and testing of transformers involves careful installation, connection, and verification of performance parameters.
• 1. Site Preparation: Ensure the foundation is level and capable of supporting the transformer weight.

• 2. Unloading: Use cranes or forklifts to safely unload the transformer from transport vehicles.

• 3. Positioning: Align the transformer with the designated installation area, ensuring proper clearance ...read more
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Q2. GIS project and gas fulling
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Q1. How to Erection power panel
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Erecting a power panel involves careful planning, installation, and safety measures to ensure proper functionality and compliance.
• 1. Site Preparation: Ensure the installation site is clean, level, and free from obstructions.

• 2. Equipment Check: Verify that all components of the power panel are present and undamaged.

• 3. Mounting: Securely mount the panel to a wall or a dedicated structure using appropriate fasteners.

• 4. El...read more
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Q2. How do to cable laying
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Cable laying involves planning, installation, and securing cables for electrical systems, ensuring safety and efficiency.
• Plan the route: Assess the area for obstacles and determine the most efficient path for the cables.

• Select appropriate cables: Choose cables based on voltage, current capacity, and environmental conditions.

• Use proper tools: Employ tools like cable pullers, trenchers, and splicing kits for effective in...read more
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Q1. How to check in generator rotor test
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Generator rotor tests ensure the rotor's integrity and performance, crucial for reliable generator operation.
• Visual Inspection: Check for physical damage, cracks, or corrosion on the rotor surface.

• Insulation Resistance Test: Measure insulation resistance between rotor windings and ground using a megohmmeter.

• Winding Resistance Test: Use a micro-ohmmeter to measure the resistance of rotor windings to ensure they are with...read more
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Q2. How to testing commissioning on HT & LT panel
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Testing and commissioning of HT & LT panels ensure safety, reliability, and performance of electrical systems.
• Visual Inspection: Check for physical damage, proper labeling, and cleanliness of the panel.

• Insulation Resistance Testing: Use a megohmmeter to measure insulation resistance to ensure safety.

• Functional Testing: Verify the operation of circuit breakers, relays, and other protective devices.

• Voltage and Curren...read more
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