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Coal India Management Trainee Interview Questions and Answers
14 Interview questions
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.
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...
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...
Latency refers to the delay before a transfer of data begins following an instruction for its transfer.
Latency is crucial in network performance; lower latency means faster response times.
In gaming, high latency can lead to lag, affecting user experience.
In medical imaging, latency can affect the speed of diagnosis.
Examples include network latency (time taken for data to travel) and input latency (delay between us...
A weep hole is a small opening that allows water to escape from a structure, preventing moisture buildup and damage.
Weep holes are commonly found in brick walls to allow trapped moisture to escape.
They help prevent water damage and mold growth by promoting drainage.
In retaining walls, weep holes allow groundwater to exit, reducing pressure on the wall.
Weep holes are often placed at the bottom of walls or structure...
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 i...
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 ...
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 includ...
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.
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.
Example...
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...
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
GRIRAJ PRASHAD MEENA
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.'
Interview Preparation Tips
Experience: Round 1-Group discussion. Proper kind of GD was organized. Everyone was given a chance to speak.So you can clearly put up your points.
Tips: In GD don't repeat the points which someone has already covered.Try to come up with the points which are closely related to the topic. Try to cover both the aspects of the topic, positive as well as negative.
Round: Other Interview
Experience: Round 2-Interview.There was a panel of 6 members.Everyone was above 45 and kind of chilled out.It started with some HR questions and then tech.In tech part they asked very basic things like Ohm's law, how fan works, how tubelight works etc. No grilling on any topic!
Tips: In interview, be calm and don't panic while answering questions.Take your own time to answer the question(only if you know the answer properly!)
General Tips: In tech part, mention only one topic which you have prepared well. Please don't tell every topic you have studied.I t was a cool experience and it feels awesome to get placed in PSU!
Skill Tips: IV K Mehta for power systems and switchgear. Any book on induction and synchronous motor will also help.
College Name: NIT SURATHKAL
Interview Questionnaire
2 Questions
- Q1. Your favorite subject and questions about that
- Q2. 'Why this company?'
- Ans.
I am impressed with the company's commitment to innovation and employee development.
The company has a reputation for investing in its employees through training and development programs.
I am excited about the company's focus on innovation and staying ahead of industry trends.
The company's mission and values align with my own personal and professional goals.
I have researched the company and have been impressed with its ...
Interview Preparation Tips
Experience: Initially there was a GD. Civil had two groups. Everybody got a chance to speak once. In the end anyone could volunteer to summarize the discussion. Topic of my GD was: 'While planning the township for Coal India employees at a mine site what all information is required?' Few students got shortlisted for the personal Interview which was the next round.
Round: Other Interview
Experience: We also had a document verification where they checked our X, XII and semester mark sheets. The only extracurricular certificate they accepted was of NCC. Personal Interview was for approximately 20 mins. In the interview they would ask you your favorite subject and question you about that. So it is best to prepare that subject well and go. For e.g. if you say concrete technology then they will ask questions like what are the tests for fresh concrete, hardened concrete, tests for aggregates etc. They will also ask for specifics like slump value of pumpable concrete.
General Tips: It was a challenging experience. I didn't expect to get selected. Keeping calm is the key. I had given many interviews for different companies. Giving sensible/intelligent answers is critical. Giving haphazard answers gives a wrong impression. Do not have expectations from any company.
Skill Tips: If you are going for a company prepare the question 'Why this company?' well. Coal India employers want to make sure that you will stay with them. They had asked me this question along with a lot information about the company such as What are Coal India's subsidiaries? Where are they located? In how many years does one get promoted from E1 grade to higher grades? Find out more about the company well before going and if possible speak to alumni working there well in advance.
College Name: NIT SURATHKAL
Interview Preparation Tips
Experience: They shortlisted some 40 students based on their CGPA in the respective categories, after coming to campus there was a GD out of which some 17 people got selected.
Round: Other Interview
Experience: Then there was a Personal interview and 10 got selected at the end.
General Tips: It was a wonderful experience knowing half of the things not knowing quite some of them and finally getting selected. One thing I knew I did not fake around with any of the question. Guys Never feel bad if not selected, because it is not destined for you. there is something better waiting for you.
Skill Tips: No extra preparation required just the normal notes of class and wherever doubt existed got it cleared from NPTEL videos they were really helpful.Be confident in whatever you know. Don't take any tension about whatever you don't know as you cannot change anything regarding that. Never beat around the bush. Be straight forward. Always go with a smile come back with a smile and be Confident. Confidence matters a lot.
College Name: NIT SURATHKAL
Interview Preparation Tips
Experience: GD for students with more than 6 CG, 22 students sat for GD, 19 shortlisted for interview, 12 were finally selected.GD topics are general for any mining student , GD is category wise.
Round: Other Interview
Experience: For interview you should know whatever you did in your training.
General Tips: Easy selection process, they are strict about CGPAs.
Skill Tips: Take the interview in Hindi and be chilled.
Skills: Industrial training /Coal Camp.
College Name: NIT SURATHKAL
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Coal India Interviews By Designations
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Coal India Management Trainee Reviews and Ratings
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Rating in categories
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Assistant Manager
203
salaries
|  ₹8 L/yr - ₹23 L/yr |
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Deputy Manager
155
salaries
| ₹12 L/yr - ₹32 L/yr |
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Management Trainee
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Manager
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| ₹14.1 L/yr - ₹35 L/yr |
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Deputy Manager - Finance
35
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| ₹13.2 L/yr - ₹28 L/yr |
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