Desai Electronics Maintenance Manager Interview Questions and Answers

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Q1. Discussed single linear diagram
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Q2. Parts of transformer
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Parts of a transformer include core, windings, insulation, tap changer, bushings, and cooling system.
• Core: Provides a path for magnetic flux

• Windings: Primary and secondary coils for transferring energy

• Insulation: Prevents short circuits

• Tap changer: Adjusts the turns ratio

• Bushings: Insulated devices for connecting external circuits

• Cooling system: Keeps the transformer from overheating
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Q3. Rating of transformer
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The rating of a transformer refers to its power capacity and voltage levels.
• Transformer rating is typically given in kVA (kilovolt-amperes) or MVA (megavolt-amperes).

• It indicates the maximum power that the transformer can handle without overheating.

• The rating also includes the primary and secondary voltage levels of the transformer.

• For example, a transformer may be rated as 500 kVA, 11 kV/415 V.

• Properly sizing the tran...read more
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Q4. One Bay Shutdown process
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One Bay Shutdown process involves isolating a single bay for maintenance while keeping the rest of the system operational.
• Isolate the bay by closing necessary valves and disconnecting equipment

• Ensure proper tagging and lockout procedures are followed

• Implement safety measures to prevent accidents

• Coordinate with other departments to minimize impact on operations

• Perform necessary maintenance work efficiently and safely

• Tes
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Q5. Scheme of substation
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A scheme of a substation refers to the layout and configuration of the various components within the substation.
• The scheme includes the arrangement of transformers, circuit breakers, busbars, and other equipment.

• It also shows the connections between different components and how power flows through the substation.

• The scheme is essential for understanding the overall operation and maintenance of the substation.

• Examples o...read more
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