Vasu Chemicals Electrical Supervisor Interview Questions and Answers

Q1. Electrical related
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Q2. Electrical troubleshooting related
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Q3. Electrical inspection related
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Q4. Electrical safety
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Q5. Electrical drawing relatef
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Q6. Electrical preventive maintenance related
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Q7. Electrical drawing preparation
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One fault occurs in electrical panel fure same fault preventive action

Q1. What is the CPC CABLE
Ans. 
CPC CABLE stands for Circuit Protective Conductor cable, which is used for earthing and providing protection against electric shock.
• CPC CABLE is also known as the earth wire in electrical installations.

• It is typically colored green and yellow to distinguish it from other cables.

• The CPC CABLE is connected to metal parts of electrical equipment to prevent electric shock in case of a fault.
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Q2. How to work ATS
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Q3. What is the High pot test done for?
Ans. 
High pot test is done to check the insulation of electrical equipment.
• High pot test is done to ensure the insulation in electrical equipment can withstand high voltage without breaking down.

• It helps in identifying any weaknesses or defects in the insulation that could lead to electrical hazards.

• The test involves applying a higher than normal voltage to the equipment to see if the insulation can handle it.

• High pot testi...read more
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Q4. What is spacifficatin of the Ht cable?
Ans. 
HT cables are high tension cables used for transmitting electricity at high voltages.
• HT cables are designed to carry high voltage electricity, typically above 11kV.

• They are insulated to prevent leakage of current and ensure safety.

• HT cables are usually made of materials like cross-linked polyethylene (XLPE) or ethylene propylene rubber (EPR).

• They are often armored to protect against physical damage and environmental fa...read more
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Q5. What is different in RCBO AND RCCB , ELCB ?
Ans. 
RCBO combines the functions of an RCD and a miniature circuit breaker, while RCCB and ELCB are older versions of RCDs.
• RCBO combines overcurrent protection (like a circuit breaker) with earth fault protection (like an RCD)

• RCCB is an older version of RCD that only detects earth faults

• ELCB is an even older version of RCD that detects earth faults by measuring the current imbalance between live and neutral wires

• RCBO is com...read more
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Q6. What is the ten delta test and which equipment in used ten delta test ?
Ans. 
The ten delta test is a diagnostic test used to assess the condition of power transformers.
• The ten delta test measures the change in power factor between the initial and final stages of a transformer's life.

• It is used to detect insulation deterioration and moisture content in the transformer oil.

• Equipment used for the ten delta test includes a power factor test set, a transformer turns ratio tester, and a megohmmeter.
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Q1. What work in UPM in data centre
Ans. 
UPM in data centre involves managing electrical systems, ensuring uptime, and implementing energy efficiency measures.
• Managing electrical systems to ensure continuous power supply

• Implementing energy efficiency measures to reduce costs

• Monitoring and maintaining backup power systems

• Troubleshooting electrical issues to minimize downtime

• Coordinating with other departments for electrical maintenance schedules
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Q2. How to work issholation transformer
Ans. 
Isolation transformers are used to isolate electrical devices from the power source for safety and protection.
• Isolation transformers have primary and secondary windings that are electrically separated to prevent direct current flow between the input and output.

• They are commonly used in medical equipment, data centers, and sensitive electronic devices to protect them from electrical noise and voltage spikes.

• Isolation tr...read more
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Q1. Tell me about yourself
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Q2. Explain power generation and transmission with different equipment roles
Ans. 
Power generation involves converting mechanical energy into electrical energy using generators, which is then transmitted through power lines to reach consumers.
• Power generation involves using generators to convert mechanical energy (from sources like turbines, windmills, or water wheels) into electrical energy

• Generators produce electricity by rotating a coil of wire within a magnetic field, creating an electric curren...read more
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Q1. Precommisioning test of transformers?
Ans. 
Precommissioning tests of transformers are essential to ensure their proper functioning.
• Insulation resistance test

• Turns ratio test

• Vector group test

• Winding resistance test

• Magnetizing current test

• No-load loss and excitation current test

• Load loss and impedance voltage test
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It contains basic electrical concepts question related with electrical machine, power system etc

Q1. Working of transformer, induction motor, SLD , various DG checklist etc
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