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Coal India Interview Questions, Process, and Tips

Updated 2 Mar 2025

Top Coal India Interview Questions and Answers

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Coal India Interview Experiences

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48 interviews found

Advisor Interview Questions & Answers

user image Anonymous

posted on 6 Jan 2021

I applied via Company Website and was interviewed in Dec 2020. There was 1 interview round.

Interview Questionnaire 

1 Question

  • Q1. Technical and administrative

Interview Preparation Tips

Interview preparation tips for other job seekers - 1. Answer correct information and data.
2. Answer must be to the point and relevant to the question asked.
3. Short and crisp.
4. No superfluous information or no jugglery of words.

Advisor Interview Questions asked at other Companies

Q1. What knowledge do you have about market? What is the status of current market
View answer (3)

Trainee Interview Questions & Answers

user image Anonymous

posted on 13 May 2021

I applied via Walk-in and was interviewed before May 2020. There were 6 interview rounds.

Interview Questionnaire 

4 Questions

  • Q1. Estimate wiring of a building and connections?
  • Ans. 

    Estimating wiring and connections in a building involves assessing the electrical needs and layout of the space.

    • Assess the electrical needs of the building, including the number of outlets, lighting fixtures, and appliances.

    • Determine the layout of the building and the best routes for wiring to avoid hazards and maximize efficiency.

    • Consider the type of wiring needed, such as copper or aluminum, and the appropriate gauge...

  • Answered by AI
  • Q2. Type of cabels that transfer power?
  • Ans. 

    Cables that transfer power are of different types depending on the application.

    • AC power cables

    • DC power cables

    • Coaxial cables

    • Ethernet cables

    • USB cables

    • HDMI cables

    • Optical fiber cables

  • Answered by AI
  • Q3. Type of single phase motor?
  • Ans. 

    Single phase motors are commonly used in household appliances and small machinery.

    • Split-phase motor

    • Capacitor-start motor

    • Capacitor-run motor

    • Shaded-pole motor

  • Answered by AI
  • Q4. Rating of distribution transformer?
  • Ans. 

    Distribution transformer rating is the maximum power it can handle without overheating.

    • Distribution transformer rating is expressed in kVA (kilovolt-ampere).

    • It is important to choose the right rating for the transformer based on the load requirements.

    • The rating of a transformer can be determined by calculating the load requirements of the system it is being installed in.

    • For example, if the load requirement is 500 kVA, ...

  • Answered by AI

Interview Preparation Tips

Interview preparation tips for other job seekers - Don't explain any topic in brief tell only that ask by interviewrs, study stronger a chaper of your trade.

Trainee Interview Questions asked at other Companies

Q1. Ques1: There is a big file of words which is dynamically changing. We are continuously adding some words into it. How would you keep track of top 10 trending words at each moment? Ques2:Write a function that returns the length of the longes... read more
View answer (2)
Coal India Interview Questions and Answers for Freshers
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Interview Questions & Answers

user image Anonymous

posted on 7 Apr 2021

I applied via Indeed and was interviewed in Oct 2020. There were 4 interview rounds.

Interview Questionnaire 

1 Question

  • Q1. They will ask basic coal preparation and some question in chemical engineering.All the best.

Interview Preparation Tips

Interview preparation tips for other job seekers - Interviewed through open recruitment after clearing an all india test. Interview was at coal Bhavan Kolkata. Good experience was asked basic questions related to coal preparation .

Interview Questions & Answers

user image

posted on 23 Feb 2022

I applied via employment news and was interviewed before Feb 2021. There was 1 interview round.

Round 1 - Technical 

(2 Questions)

  • Q1. Calculate power factor in single phase and 3-phase circuits and what precaution to take to improve power factor.
  • Q2. Only technical, what is power factor in 3-phase circuits.

Interview Preparation Tips

Topics to prepare for Coal India interview:
  • Technical Skills
  • GK
  • aptitude
  • reasoning
Interview preparation tips for other job seekers - Try to work hard and be self confident and gather knowledge of all subjects. Read current topics.

Coal India interview questions for popular designations

 Management Trainee

 (16)

 Graduate Engineer Trainee (Get)

 (2)

 Management Trainee Mining

 (2)

 Deputy Manager

 (2)

 Engineer

 (1)

 Accountant

 (1)

 Software Engineer

 (1)

 Assistant Manager

 (1)

I applied via Campus Placement and was interviewed before Apr 2020. There were 3 interview rounds.

Interview Questionnaire 

4 Questions

  • Q1. 1) What are the Safety devices of Direct Haulage?
  • Ans. 

    Safety devices of Direct Haulage include emergency stop buttons, warning signals, and safety barriers.

    • Emergency stop buttons are installed at regular intervals along the haulage route.

    • Warning signals such as flashing lights and alarms are used to alert workers of approaching haulage equipment.

    • Safety barriers are used to prevent workers from entering hazardous areas.

    • Proximity detection systems are used to detect the pre...

  • Answered by AI
  • Q2. 2) What is the Calorific Value of Coal?
  • Ans. 

    The calorific value of coal varies depending on the type of coal, but typically ranges from 24 to 30 megajoules per kilogram.

    • Calorific value is the amount of heat released when a substance is burned.

    • It is measured in units of energy per unit of mass, such as joules per gram or megajoules per kilogram.

    • The calorific value of coal can vary depending on factors such as moisture content, ash content, and sulfur content.

    • For ...

  • Answered by AI
  • Q3. Where is Triveni Sangam?
  • Q4. 3) What is the difference between Portable and Transportable Machines?
  • Ans. 

    Portable machines can be easily carried around, while transportable machines require disassembly and reassembly for transportation.

    • Portable machines are designed to be easily moved from one location to another without much effort.

    • Transportable machines require disassembly and reassembly for transportation.

    • Portable machines are usually smaller and lighter than transportable machines.

    • Examples of portable machines include...

  • Answered by AI

Interview Preparation Tips

Interview preparation tips for other job seekers - Study the Project Report and Practical Experience

Chief Manager Interview Questions asked at other Companies

Q1. What was the strategy to increase business share in particular role ! How will you increase market share in ICICI bank .
View answer (1)

Get interview-ready with Top Coal India Interview Questions

I applied via Newspaper Ad and was interviewed before May 2021. There was 1 interview round.

Round 1 - Technical 

(1 Question)

  • Q1. Basic Mechanical Engg Question. The interview lasted only 15 mins.

Interview Preparation Tips

Interview preparation tips for other job seekers - Good Company since its a PSU. But work profile is not so good as you will posted in remote areas

Graduate Engineer Trainee (Get) Interview Questions asked at other Companies

Q1. Q: 1 What is IC engine? What is the types of IC engine? Q:2 Difference between Otto cycle and Diesel cycle? What is the process of both cycle and what is the effeciency of both cycle ? Which one is good in effeciency? Q:3 Difference between... read more
View answer (2)

Strategist Interview Questions & Answers

user image Anonymous

posted on 2 Oct 2020

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

Interview Questionnaire 

2 Questions

  • Q1. How can we find the steel weight
  • Ans. 

    To find the steel weight, you need to know the dimensions and density of the steel.

    • Determine the dimensions of the steel (length, width, and height)

    • Find the density of the specific type of steel being used

    • Multiply the volume of the steel by its density to calculate the weight

    • Weight (in kg) = Volume (in m^3) x Density (in kg/m^3)

  • Answered by AI
  • Q2. How many centimetres in one metre
  • Ans. 

    There are 100 centimetres in one metre.

    • One metre is equal to 100 centimetres.

    • To convert metres to centimetres, multiply by 100.

    • To convert centimetres to metres, divide by 100.

  • Answered by AI

Interview Preparation Tips

Interview preparation tips for other job seekers - Your interview are depends on your confidence and how much knowledge about your particular field

Strategist Interview Questions asked at other Companies

Q1. A group of n people is such that a symmetric relation of knowing another exists in the group. i.e. the relation is A knows B. and being symmetric if A knows B then B knows A. Prove that there exist atleast 2 people who know same no. of peop... read more
View answer (1)

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

Electrician Interview Questions asked at other Companies

Q1. 1. How much current takes a 5hp motor ?, 2. Draw a STAR DELTA and DOL starter control wireing. 3. How to connect star connection, and DELTA connectin. 4. What is the kw of 30hp motor ?, 5. Can you connect a temperature controller ?, 6. What... read more
View answer (5)

I applied via Employment News and was interviewed before Dec 2018. There were 8 interview rounds.

Interview Questionnaire 

4 Questions

  • Q1. How was your interview?
  • Q2. How many members were there during the Interview?
  • Q3. Five Members, chaired by one.
  • Q4. How was your personal experience apart from regular Engineering related queries?

Interview Preparation Tips

Interview preparation tips for other job seekers - Always be positive like you are already selected and is discussing issues related to your day to day activities with your colleagues and Seniors. Be well dressed not overdressed.

Interview Questionnaire 

5 Questions

  • Q1. 1. About Dragline and Dumpers used in mining
  • Q2. 2. What is the difference in the speeds of camshaft and crankshaft?
  • Ans. 

    The camshaft and crankshaft have different speeds in an engine.

    • The camshaft controls the opening and closing of the engine's valves, while the crankshaft converts the reciprocating motion of the pistons into rotational motion.

    • The camshaft rotates at half the speed of the crankshaft in a four-stroke engine.

    • For example, if the crankshaft rotates at 6000 revolutions per minute (RPM), the camshaft will rotate at 3000 RPM.

    • T...

  • Answered by AI
  • Q3. 3. G codes in CNC, What is CNC?
  • Ans. 

    CNC stands for Computer Numerical Control. It is a manufacturing process that uses pre-programmed computer software to control machine tools.

    • CNC is a manufacturing process that automates the operation of machine tools.

    • It uses computer software to control the movement and operation of the machines.

    • CNC machines are widely used in industries such as automotive, aerospace, and electronics.

    • G codes are a programming language...

  • Answered by AI
  • Q4. 4. Difference types of chips in metal cutting
  • Ans. 

    Different types of chips in metal cutting include continuous chips, discontinuous chips, and built-up edge chips.

    • Continuous chips are formed when the cutting tool continuously removes material from the workpiece.

    • Discontinuous chips are formed when the cutting tool intermittently removes material, resulting in segmented chips.

    • Built-up edge chips occur when the material being cut adheres to the cutting tool, forming a bu...

  • Answered by AI
  • Q5. 5. Discontinuous chips are formed in which materials?
  • Ans. 

    Discontinuous chips are formed in certain materials during machining processes.

    • Discontinuous chips are formed in brittle materials like cast iron, ceramics, and glass.

    • These materials have low ductility and tend to fracture during machining.

    • The discontinuous chips have a segmented or broken appearance.

    • They are characterized by irregular shapes and rough surfaces.

    • Examples of materials that form discontinuous chips includ...

  • Answered by AI

Interview Preparation Tips

Round: Group Discussion
Experience: Everyone was given two minutes initially to speak on the topic and then a general discussion was allowed.
Tips: Try to give new points which anyone else has not pointed out.
Don't repeat the points of others.

Round: Technical Interview
Experience: There was only one HR question, ''Tell me about yourself?''. Else the interview was completely technical.
Tips: Be confident with your answers.

General Tips: Be prepared about the company.
And should have a good knowledge of the machines used in mining.
Skills: Practical Application Of Concepts, Technical Skills
College Name: NIT Durgapur

Top Coal India Management Trainee Interview Questions and Answers

Q1. 2. What is the difference in the speeds of camshaft and crankshaft?
View answer (1)

Management Trainee Interview Questions asked at other Companies

Q1. What do you mean by balance sheet reconciliation could you explain briefly?
View answer (45)
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Coal India Interview FAQs

How many rounds are there in Coal India interview?
Coal India interview process usually has 1-2 rounds. The most common rounds in the Coal India interview process are Technical, Resume Shortlist and Aptitude Test.
What are the top questions asked in Coal India interview?

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

  1. 1.What is industry 4.0 2., what is ECC, what is edge computing, 3.what is TDI m...read more
  2. The max width of the gallery in Indian coal mines...read more
  3. 2. What is the difference in the speeds of camshaft and cranksha...read more
How long is the Coal India interview process?

The duration of Coal India interview process can vary, but typically it takes about less than 2 weeks to complete.

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Coal India Interview Process

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