Modern Insulators Ohe Electrical Engineer Interview Questions and Answers

Technical questions (be prepared)

Q1. Basic laws like right hand thumb rule
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Q2. Questions related to Electrical Machines
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Q1. You have any experience
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Q2. No, I didn't have any experience
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71.72% in electrical engineering diploma

About your work style and work management

Q1. Test your deep technical knowledge of your work
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Q2. Transformer working principle.
Ans. 
Transformer works on the principle of electromagnetic induction to transfer electrical energy between two or more circuits.
• Transformers have two coils of wire, known as primary and secondary coils.

• When an alternating current flows through the primary coil, it creates a changing magnetic field.

• This changing magnetic field induces a voltage in the secondary coil, transferring electrical energy.

• Transformers are used to st...read more
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Q3. Proses of new meter installation.
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The process of new meter installation involves site survey, meter selection, installation, testing, and commissioning.
• Site survey to determine the location and requirements for the new meter

• Meter selection based on the specific needs and specifications of the site

• Installation of the new meter by qualified electricians or engineers

• Testing the meter to ensure accurate readings and proper functionality

• Commissioning the me...read more
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Q4. What is the Proses of LOTO? How it's works?
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LOTO stands for Lockout/Tagout. It is 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 isolating energy sources, locking them out, and tagging them to indicate that maintenance work is being performed.

• Workers involved in the maintenance work are the ones who apply the locks and tags, ensuring t...read more
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Q1. Discussed about your salary
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Q2. Why you want this job?
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Q3. Why we hire you?
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Q4. Why are you leaving your previous company?
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Q1. Electrical engineering
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Q2. Electrical motor
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Q3. Electrical equipment
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Q1. Electrical maintenance
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Q2. Electrical motor
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Q1. Why gravels are usesd in switch yard?
Ans. 
Gravels are used in switch yards to provide a stable surface for equipment and to improve drainage.
• Gravels help in reducing the risk of equipment damage due to flooding or standing water.

• They also help in preventing erosion and maintaining the stability of the ground.

• Gravels are easy to install and maintain, making them a cost-effective option for switch yards.

• They allow for better heat dissipation, which is important ...read more
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Q2. Draw a SLD of 33/11 kv switchyard and explain equipments ?
Ans. 
A Single Line Diagram (SLD) of a 33/11 kV switchyard shows the layout and connections of electrical equipment.
• Key equipments include transformers, circuit breakers, isolators, busbars, surge arresters, and control panels.

• Transformers step down voltage from 33 kV to 11 kV for distribution.

• Circuit breakers protect the system from overloads and short circuits.

• Isolators are used for isolating equipment for maintenance.

• Busb...read more
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Q3. What is OC and SC test of transformer ?
Ans. 
OC and SC tests are conducted on transformers to determine their efficiency and performance under different load conditions.
• OC test (Open Circuit test) is conducted to determine the no-load loss and magnetizing impedance of the transformer.

• SC test (Short Circuit test) is conducted to determine the full-load copper loss and equivalent resistance of the transformer.

• Both tests help in evaluating the efficiency and voltage...read more
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Q1. Basic questions
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Q2. Previous employer related
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Q1. Technical questions
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Q2. Machine related
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Over all plant related

Q1. Man power handle and previous employer related
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Q1. Types ho single phase motor
Ans. 
Types of single phase motors include split-phase, capacitor start, shaded pole, and permanent split capacitor motors.
• Split-phase motor: commonly used in household appliances like fans and blowers

• Capacitor start motor: used in high starting torque applications like air compressors

• Shaded pole motor: used in small appliances like refrigerators and fans

• Permanent split capacitor motor: used in HVAC systems and pumps
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Q2. Types of transfermar
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Transfermars are devices used to transfer electrical power or signals from one circuit to another.
• Types include transformers, capacitors, inductors, and transmission lines

• Transformers transfer electrical power between circuits through electromagnetic induction

• Capacitors store and release electrical energy

• Inductors store energy in a magnetic field

• Transmission lines transfer electrical signals over long distances
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