Power Grid Corporation of India Ohe Electrical Expert Interview Questions and Answers

Quantitative aptitude

Q1. Given the image of switch,which type of switch shown in the fig
Ans. 
The switch shown in the image is a toggle switch.
• The switch has a lever that can be moved up and down to turn it on or off.

• Toggle switches are commonly used in electronic devices and appliances.

• Examples of toggle switches include light switches and power switches on electronic devices.
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Q2. Network theorem questions
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Q1. In t years where you want to see yourself
Ans. 
In t years, I see myself as a senior electrical engineer leading innovative projects and mentoring junior engineers.
• Continuing to develop my technical skills and knowledge in the field of electrical engineering

• Taking on more leadership roles within projects and teams

• Mentoring and guiding junior engineers to help them grow in their careers

• Contributing to the development of cutting-edge technologies and solutions

• Possibly...read more
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Q2. Why do you want to join Hitachi energy
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I want to join Hitachi Energy because of their innovative solutions and global impact in the energy sector.
• Hitachi Energy is a leader in providing sustainable energy solutions

• I am impressed by Hitachi Energy's commitment to innovation and technology advancement

• I believe my skills and experience align well with the opportunities at Hitachi Energy

• I am excited about the chance to work on cutting-edge projects and contribu
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Q1. What is your expected salary?
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Q2. What is the location of the company?
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Q1. What is the purpose of an uninterruptible power supply (UPS)?
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Q2. What is a substation?
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Q1. What is a relay?
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Q1. Technical stuff
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Q1. Technical stuff related to current job
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Q1. Background and about your self
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Q2. Why looking for change
Ans. 
Seeking new challenges and opportunities for growth in my career.
• Looking to expand my skill set and knowledge in a new environment

• Interested in working on cutting-edge technologies and projects

• Seeking a more collaborative and innovative work culture

• Want to take on more leadership responsibilities and advance my career
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Q1. Like what is your work experience. Are you willing to climb twice in a day .
Ans. According to your experience needs to give answers Second question- yes
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Q2. Are you willing to work if require to support near by site .
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Q1. As per your experience as previous company they asked questions, but more focos on safety .
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Q2. What is LOTO , Types of LOTO
Ans. 
LOTO stands for Lockout/Tagout, a safety procedure used to ensure that dangerous machines are properly shut off and not started up again prior to the completion of maintenance or servicing work.
• LOTO involves locking the energy isolating devices with an assigned individual lock and tag to prevent the machine from being turned on.

• Types of LOTO include electrical LOTO, mechanical LOTO, and pneumatic LOTO.

• Examples of LOTO ...read more
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Q1. Previous experiences questions, like DFIG , Converter system, power factor , transformer , lighting system, Earthing system .
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Normal discussion with seniors

Q1. Salary discussion and joining details
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Q1. Types of insulator and their requirements
Ans. 
Insulators are materials used to prevent the flow of electricity. They must have high resistivity, mechanical strength, and thermal stability.
• Types of insulators include porcelain, glass, polymer, and ceramic.

• Requirements for insulators include high resistivity to prevent leakage current, mechanical strength to withstand mechanical stress, and thermal stability to withstand temperature variations.

• Examples of insulators...read more
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Q2. How the wind turbine works?
Ans. 
Wind turbines convert the kinetic energy of the wind into mechanical power, which is then converted into electricity.
• Wind turns the blades of the turbine

• Blades are connected to a rotor

• Rotor spins a generator to produce electricity

• Electricity is then sent to the grid for distribution
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Q3. Types of generator, types of cb,
Ans. 
Types of generators include diesel, gas, and wind generators. Types of circuit breakers include air, oil, and vacuum circuit breakers.
• Types of generators: diesel, gas, wind

• Types of circuit breakers: air, oil, vacuum
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Q4. Diffrenece betwween isolator and cb
Ans. 
Isolator is used for isolating a circuit whereas circuit breaker is used for breaking a circuit during fault conditions.
• Isolator is a mechanical switch used for isolating a circuit from the power source.

• Circuit breaker is an electrical switch designed to protect an electrical circuit from damage caused by overload or short circuit.

• Isolators do not have any interrupting capacity, while circuit breakers can interrupt the...read more
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Q1. What is Transformer? & About your Project and Internship
Ans. 
A transformer is a device that transfers electrical energy between two or more circuits through electromagnetic induction.
• Transformers consist of two coils of wire, known as the primary and secondary coils.

• The primary coil is connected to a power source, creating a magnetic field when current flows through it.

• This magnetic field induces a voltage in the secondary coil, transferring energy from the primary to the second...read more
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Q1. About yourself and your Family
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