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Coal India Electrician Interview Questions, Process, and Tips

Updated 27 Apr 2021

Coal India Electrician Interview Experiences

1 interview found

Electrician Interview Questions & Answers

user image Anonymous

posted on 27 Apr 2021

I applied via Walk-in and was interviewed before Apr 2020. There was 1 interview round.

Interview Questionnaire 

4 Questions

  • Q1. What is transformer
  • Ans. 

    A transformer is an electrical device that transfers electrical energy from one circuit to another through electromagnetic induction.

    • Transformers are used to increase or decrease the voltage of an alternating current (AC) power supply.

    • They consist of two coils of wire, known as the primary and secondary coils, which are wrapped around a magnetic core.

    • When an AC voltage is applied to the primary coil, it creates a magne...

  • Answered by AI
  • Q2. And type of breker
  • Ans. 

    The type of breaker used depends on the electrical load and the circuit requirements.

    • The most common types of breakers are standard, AFCI, GFCI, and dual-function.

    • Standard breakers are used for general-purpose circuits.

    • AFCI breakers are used for circuits that power bedrooms and living rooms.

    • GFCI breakers are used for circuits that power bathrooms, kitchens, and outdoor areas.

    • Dual-function breakers combine AFCI and GFCI...

  • Answered by AI
  • Q3. Type of conductor
  • Ans. 

    Conductors are materials that allow electricity to flow through them. There are different types of conductors used in electrical systems.

    • Copper is the most commonly used conductor in electrical wiring

    • Aluminum is also used as a conductor, especially in high voltage power transmission

    • Silver is the best conductor, but it is too expensive for most applications

    • Gold is also a good conductor, but it is even more expensive tha...

  • Answered by AI
  • Q4. Difference of mcb and mccb
  • Ans. 

    MCB is a miniature circuit breaker while MCCB is a molded case circuit breaker.

    • MCB is used for low current applications while MCCB is used for high current applications.

    • MCB is rated up to 100 amps while MCCB can be rated up to 2500 amps.

    • MCCB has adjustable trip settings while MCB does not.

    • MCCB is more expensive than MCB.

    • Examples of MCB brands include Legrand and Schneider while examples of MCCB brands include Siemens a

  • Answered by AI

Interview Preparation Tips

Interview preparation tips for other job seekers - All good

Interview questions from similar companies

Interview experience
3
Average
Difficulty level
Easy
Process Duration
2-4 weeks
Result
Selected Selected

I applied via AmbitionBox and was interviewed in Nov 2023. There were 3 interview rounds.

Round 1 - Resume Shortlist 
Pro Tip by AmbitionBox:
Keep your resume crisp and to the point. A recruiter looks at your resume for an average of 6 seconds, make sure to leave the best impression.
View all tips
Round 2 - Technical 

(2 Questions)

  • Q1. Mobile Chaucer plant
  • Q2. Ster-delt connection
Round 3 - Technical 

(3 Questions)

  • Q1. NO NC connection
  • Q2. Wiring system all type
  • Q3. Home wiring system

Interview Preparation Tips

Topics to prepare for Rungta Mines Electrician interview:
  • Electrician experience
Interview preparation tips for other job seekers - Electrician experience 5 years working experience
Interview experience
5
Excellent
Difficulty level
Easy
Process Duration
4-6 weeks
Result
Selected Selected

I appeared for an interview in Aug 2024.

Round 1 - Technical 

(7 Questions)

  • Q1. What is a transformer?
  • Ans. 

    A transformer is an electrical device that transfers electrical energy between two or more circuits through electromagnetic induction.

    • Transformers are used to increase or decrease voltage levels in electrical circuits.

    • They consist of two coils of wire, known as the primary and secondary coils, wrapped around a core made of iron or other magnetic materials.

    • Step-up transformers increase voltage levels, while step-down tr...

  • Answered by AI
  • Q2. What is Tan Delta testing?
  • Ans. 

    Tan Delta testing is a diagnostic test used to measure the insulation quality of electrical equipment.

    • Tan Delta testing measures the power factor of insulation materials to detect any defects or deterioration.

    • It helps in identifying potential issues before they lead to equipment failure or breakdown.

    • The test involves applying a voltage to the insulation and measuring the current flowing through it.

    • Results are compared ...

  • Answered by AI
  • Q3. What is CT and how does it work?
  • Q4. Do you have experience working in a switch yard?
  • Ans. 

    Yes, I have experience working in a switch yard.

    • I have worked in a switch yard for 3 years, performing maintenance and repairs on various electrical equipment.

    • I am familiar with the safety protocols and procedures required in a switch yard environment.

    • I have experience troubleshooting and resolving issues with switch yard equipment, such as transformers and circuit breakers.

  • Answered by AI
  • Q5. What is a merger and how does it work?
  • Ans. 

    A merger is when two companies combine to form a new entity, typically to increase market share or efficiency.

    • A merger involves two companies agreeing to join forces and operate as a single entity.

    • The goal of a merger is often to increase market share, expand into new markets, or achieve cost savings through economies of scale.

    • There are different types of mergers, such as horizontal mergers (between competitors in the ...

  • Answered by AI
  • Q6. Do you have experience with testing transformers?
  • Ans. 

    Yes, I have experience testing transformers in various settings.

    • I have experience testing transformers in industrial settings to ensure proper functioning.

    • I am familiar with using multimeters and other testing equipment to check for voltage, current, and resistance.

    • I have tested transformers for efficiency and performance, identifying any issues and making necessary repairs.

    • I have also conducted routine maintenance che...

  • Answered by AI
  • Q7. What is the function of an isolator in electrical work?
  • Ans. 

    An isolator is a device used to disconnect a circuit from the power supply, ensuring the safety of personnel working on the circuit.

    • An isolator is used to physically disconnect a circuit from the power supply, allowing maintenance work to be carried out safely.

    • It is often used in conjunction with a lockout/tagout system to prevent accidental re-energization of the circuit.

    • Isolators are commonly found in electrical pane...

  • Answered by AI

Interview Preparation Tips

Interview preparation tips for other job seekers - I interviewed to the best of my ability, and the interviewers were friendly, asking relevant questions. Everything went well, and I passed the interview. Consequently, I have been selected.

I applied via Job Portal and was interviewed before Nov 2021. There were 3 interview rounds.

Round 1 - Resume Shortlist 
Pro Tip by AmbitionBox:
Keep your resume crisp and to the point. A recruiter looks at your resume for an average of 6 seconds, make sure to leave the best impression.
View all tips
Round 2 - Aptitude Test 

Direct through campus placement and group discussion.

Round 3 - Technical 

(2 Questions)

  • Q1. All the studies related concepts were aksed
  • Q2. About COST ACCOUNTING STANDARDS

Interview Preparation Tips

Interview preparation tips for other job seekers - Clear all your attempts of CMA in one go and prepare all the concepts before interview

I applied via Referral and was interviewed in May 2019. There were 3 interview rounds.

Interview Questionnaire 

1 Question

  • Q1. What is neutonian fluid ? , Stages of fracture, working of engine, basic thermodynamics questions , questions from strength of material ,
  • Ans. 

    Newtonian fluid is a type of fluid that follows Newton's law of viscosity.

    • Newtonian fluid exhibits a linear relationship between shear stress and shear rate.

    • Examples of Newtonian fluids include water, air, and most oils.

    • Stages of fracture include initiation, propagation, and final failure.

    • Engine works by converting heat energy into mechanical work.

    • Basic thermodynamics questions may include concepts like the first and s...

  • Answered by AI

Interview Preparation Tips

Interview preparation tips for other job seekers - Prepare for your core subjects especially the basic one which we use to study in our 2nd and 3rd year of engineering. These will help to stand out and score better in interview.
They have conducted one hour long interview bombarding questions from core mechanical background and questions from your skills too which you have mentioned in your resume.

I applied via Walk-in and was interviewed before Dec 2019. There were 4 interview rounds.

Interview Questionnaire 

2 Questions

  • Q1. About your self
  • Q2. How to execute desputes between contractor and company
  • Ans. 

    Disputes can be resolved through negotiation, mediation, arbitration or litigation.

    • Negotiation involves discussion and compromise to reach a mutually acceptable solution.

    • Mediation involves a neutral third party who helps the parties reach a settlement.

    • Arbitration involves a neutral third party who makes a binding decision after hearing both sides.

    • Litigation involves taking the dispute to court and having a judge or jur...

  • Answered by AI

Interview Preparation Tips

Interview preparation tips for other job seekers - Maintain your confidence level and be positive & learning attitude
Interview experience
4
Good
Difficulty level
Easy
Process Duration
Less than 2 weeks
Result
Selected Selected

I applied via Company Website and was interviewed in Nov 2023. There were 3 interview rounds.

Round 1 - Resume Shortlist 
Pro Tip by AmbitionBox:
Don’t add your photo or details such as gender, age, and address in your resume. These details do not add any value.
View all tips
Round 2 - Technical 

(1 Question)

  • Q1. Genal taip , Technical
Round 3 - Technical 

(3 Questions)

  • Q1. Who are you job hai kya
  • Q2. Job Hai to coll karna
  • Q3. Interviews kob ho gaa

Interview Questionnaire 

2 Questions

  • Q1. Firing order in 6 cylinder engine
  • Ans. 

    The firing order in a 6 cylinder engine refers to the sequence in which each cylinder fires.

    • The firing order is determined by the engine design and is usually specified by the manufacturer.

    • It is important to follow the correct firing order to ensure proper engine performance and minimize vibrations.

    • The firing order can be found in the engine's service manual or by contacting the manufacturer.

    • For example, a common firin

  • Answered by AI
  • Q2. What is rpm turbo
  • Ans. 

    RPM turbo refers to the revolutions per minute of a turbocharger, which measures how fast the turbocharger's turbine is spinning.

    • RPM turbo is a measure of the speed at which a turbocharger's turbine is rotating

    • It indicates the efficiency and power output of the turbocharger

    • Higher RPM turbo values generally result in increased boost pressure and engine performance

    • For example, a turbo with an RPM turbo of 10,000 would sp

  • Answered by AI
Interview experience
5
Excellent
Difficulty level
Easy
Process Duration
More than 8 weeks
Result
Selected Selected

I applied via Approached by Company and was interviewed in May 2022. There were 2 interview rounds.

Round 1 - Resume Shortlist 
Pro Tip by AmbitionBox:
Keep your resume crisp and to the point. A recruiter looks at your resume for an average of 6 seconds, make sure to leave the best impression.
View all tips
Round 2 - Technical 

(2 Questions)

  • Q1. It may be possible to your selection advise.
  • Q2. Iam going to interview and tell me some questions.after that iam sending reply . After seven days .get out results .iam selected.so that after 15 days .iam joining the company.

Interview Preparation Tips

Topics to prepare for Vedanta Aluminium Operator interview:
  • Technical or
  • Marketing sales
Interview preparation tips for other job seekers - I am good manners person.Retired from Indian Army so I am always dicipline And punctually also hard working.with also good comunication soft skills.
Interview experience
4
Good
Difficulty level
Moderate
Process Duration
-
Result
Selected Selected

I applied via Walk-in and was interviewed in Feb 2024. There was 1 interview round.

Round 1 - Technical 

(1 Question)

  • Q1. Experience of working....
  • Ans. It's saw the ability and potential of person to do work.....
  • Answered Anonymously

Coal India Interview FAQs

What are the top questions asked in Coal India Electrician interview?

Some of the top questions asked at the Coal India Electrician interview -

  1. What is transform...read more
  2. Difference of mcb and m...read more
  3. And type of bre...read more

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Coal India Electrician Salary
based on 4 salaries
₹1 L/yr - ₹2.5 L/yr
33% less than the average Electrician Salary in India
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