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Coal India Management Trainee Interview Questions, Process, and Tips
Top Coal India Management Trainee Interview Questions and Answers
- Q1. 2. What is the difference in the speeds of camshaft and crankshaft?
- Q2. 5. Discontinuous chips are formed in which materials?
- Q3. What happens to copper loss in transformer when it is operates at half its rated MVA?
Coal India Management Trainee Interview Experiences
16 interviews found
Anonymous
General mining field questions are there
(2 Questions)
- Q1. About mining field real time senerio asked
- Q2. 1. What is crown pillar & rib
- Ans.
Crown pillar & rib are terms used in mining to describe the rock structures above and around a mined-out area.
Crown pillar is the rock mass above an underground excavation that supports the overlying rock and prevents collapse.
Rib refers to the rock walls or pillars left between mined-out areas to provide support and prevent collapse.
Both crown pillar and rib are crucial for the stability and safety of underground mini...
Selected
I applied via Campus Placement and was interviewed before Nov 2023. There was 1 interview round.
(2 Questions)
- Q1. Give a brief description of equipments used in an Open Cast Mine
- Ans.
Equipments used in an Open Cast Mine include excavators, dump trucks, bulldozers, drills, and draglines.
Excavators are used for digging and removing overburden or ore.
Dump trucks are used for transporting materials within the mine.
Bulldozers are used for pushing and leveling the ground.
Drills are used for drilling blast holes for explosives.
Draglines are used for removing overburden in large quantities.
- Q2. What is stripping ratio and mention the workable range for an OCP
- Ans.
Stripping ratio is the amount of waste rock removed to extract one unit of ore. Workable range for an OCP is typically between 1:1 to 10:1.
Stripping ratio is calculated by dividing the amount of waste rock by the amount of ore extracted.
A lower stripping ratio indicates a more efficient mining operation.
For an Open Cut Pit (OCP), the workable range for stripping ratio is usually between 1:1 to 10:1.
For example, if a mi...
I was interviewed in Dec 2016.
Interview Questionnaire
5 Questions
- Q1. Family background
- Q2. What us weep hole
- Q3. Latency?
- Q4. RMC?
- Q5. Why lack of high rise building in India
- Ans.
The lack of high-rise buildings in India can be attributed to various factors such as land availability, building regulations, cultural preferences, and infrastructure limitations.
Limited availability of land in urban areas restricts the construction of high-rise buildings.
Building regulations and zoning laws often impose height restrictions and setback requirements.
Cultural preferences in India often favor low-rise bu...
Interview Preparation Tips
Experience: First 2 minutes time to speak then counter arguments or any add-on
Tips: Just be confident
Duration: 10 hours
Round: Technical + HR Interview
Tips: Just be energetic through out the interview
Skills: Communication And Confidence
Pawan Dubey
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...
- 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...
- 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...
- 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...
Interview Preparation Tips
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
Coal India interview questions for designations
Interview Preparation Tips
Experience: First round of selection process was GD. Total 35 B.Tech candidates appeared from all the branches (Civil + Mech. + Elec.) and 12 students from MSc Geotech. appeared for the post of Management Trainee. The GD was done branch wise, for ex. 12 candidates from civil engg. (including me) made one group of GD and likewise total four groups gave GD. As you can notice that the topic of GD is quite simple and civil grads. can easily speak upon it.
Tips: Speak relevant points only. It does not matter how much you spoke, but the points you raised. Try to cover all the aspects regarding topic i.e., Technical, Economical and Social. Speak clearly and politely in an audible tone.
Duration: 20 mins minutes
Round: Technical Interview
Experience: Interview was mainly technical. There were expert technical recruiters who were testing the basic knowledge of students about their respective branches. If you are a civil grad. , revise all the courses you have gone through since your 2nd year. Atleast make your fundamentals clear. They asked me questions about Strength of materials and Structural Analysis for ex. how to analysis of beams subjected to some loading conditions (you have to explain the process, no need to do exact calculations ) , shear force and bending moment diagrams, reinforcement detailing of beams and slabs. Then they asked me what are my topics of interest. This is a critical question, tell only those topics in which you can answer maximum questions. My topic of interest was Concrete technology, so they asked me about Tests for fresh state concrete and hardened state concrete, some basic questions about construction practices, gradation of aggregates, what is design mix and explain its procedure, initial and final setting time of concrete etc. etc. The point is be thorough with your basics. Answer precisely, do not give vague answer, say no if you really don't know the answer.
Skills:
College Name: IIT Bhubaneshwar
Get interview-ready with Top Coal India Interview Questions
harsha
Interview Preparation Tips
Experience: Everyone was given two minutes of time to speak. It was more of an extempore rather than a group discussion. We were given the freedom to choose a topic among ourselves, failing to do so a topic was given by the Chair. The group strength was of 15 students each.
Tips: It is better to outperform in group discussion and get noticed. It makes you half selected. Try to touch technical, social and economical aspects of the given topic. A prior preparation on current trending topics will help you push further.
Duration: 10 Min minutes
Round: Behavioural Interview
Experience: Questions relating to your interest in the field were asked. The theme was based on why you want to join con India. Basic Tech Questions on Projects and Internship. The panel consisted of 10 Members.
Skills: 1)communication
College Name: IIT Kharagpur
Interview Questionnaire
2 Questions
- Q1. What happens to copper loss in transformer when it is operates at half its rated MVA?
- Ans.
Copper loss in a transformer decreases when it operates at half its rated MVA.
Copper loss is directly proportional to the square of the current flowing through the windings.
When the transformer operates at half its rated MVA, the current flowing through the windings is reduced.
As a result, the copper loss in the transformer decreases.
This reduction in copper loss leads to improved efficiency and lower energy consumptio
- Q2. Induction Motor that gives high starting torque as well as high efficiecy?
- Ans.
A wound rotor induction motor can provide high starting torque and high efficiency.
Wound rotor induction motors have a higher starting torque compared to squirrel cage induction motors.
The rotor windings in a wound rotor motor can be connected to external resistors, allowing for higher torque during startup.
By adjusting the resistance in the rotor circuit, the motor can achieve high efficiency at full load.
Examples of ...
Interview Preparation Tips
Experience: 15 minutes were given to prepare then everybody expressed their views for 5 minutes each.
Duration: 30 minutes
Round: Technical Interview
Experience: Purely technical interview went for about 15 minutes.
College Name: IIT Roorkee
Interview Questionnaire
4 Questions
- Q1. TEll me about yourself?
- Ans.
I am a highly motivated individual with a passion for learning and growth.
I have a Bachelor's degree in Business Administration
I have completed several internships in the field of marketing and sales
I am a quick learner and enjoy taking on new challenges
I am a team player and enjoy collaborating with others to achieve common goals
- Q2. Question related to subject?
- Q3. Tell me about haul road?
- Ans.
A haul road is a road used for transporting materials, typically in a mining or construction site.
Haul roads are designed to handle heavy loads and are often unpaved.
They are used to transport materials such as ore, rock, and dirt.
Haul roads must be maintained regularly to ensure safety and efficiency.
Proper drainage is important to prevent erosion and maintain road stability.
Examples of haul road equipment include hau
- Q4. What is flame safety lamp?
- Ans.
A flame safety lamp is a type of lamp used in mining to detect methane gas and prevent explosions.
It works by creating a flame inside a mesh screen that will go out if methane is present.
The lamp was invented by Sir Humphry Davy in 1815.
It was widely used in coal mines in the 19th and early 20th centuries.
Today, electronic gas detectors have largely replaced flame safety lamps in mining.
Interview Preparation Tips
Experience: i spoken in hindi.I only spoken selected topic related to the topic.i totally concentrated to interviewer and fellows.
Tips: Be cooll,speak frankly
Round: Technical Interview
Experience: 1.I told about me and my graduation and hobbies.Also about my achievements.2.I asked about minerals in rajasthan. I answered very well like lignite,cu,zn,pb,marbels.3.I answered it is generally gradient is 1in14 and stability is very important and its floor is hard.4. i answered that it it used in detection of O2 and CH4. then they said OK.you can leave.
Tips: Be confident
College Name: IIT DHANBAD
Interview Preparation Tips
Experience: it was 3rd gd of my life
Tips: always give a word of thanks to the person who gives you chance to speak.
if u know nothing about the topic let others speak and then get some idea . u may even repeat their points too . all they want you is to be speaking kind
Duration: 10 minutes
College Name: IIT DHANBAD
Interview Preparation Tips
Skills: ELECTRICAL MACHINE, POWER SYSTEM, CONTROL SYSTEM
College Name: ISM DHANBAD
Funny Moments: I wanted to shake hands with the interviewer but i thought i made them angry by being stick to the point although i did not know that i was right or wrong then suddenly he said ' Dear you are done,send the next person.'
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Coal India Management Trainee Interview Process
based on 2 interviews
3 Interview rounds
- Group Discussion Round
- Personal Interview
- Technical Round
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