AmbitionBox
Interview Questions
- Reviews
- Salaries
- Interview Questions
- About Company
- Benefits
- Jobs
- Office Photos
- Community
Add office photos
Filter interviews by
Clear (1)
Coal India Mining Overman Interview Questions, Process, and Tips
Coal India Mining Overman Interview Experiences
1 interview found
I applied via Walk-in and was interviewed in Feb 2022. There were 2 interview rounds.
(13 Questions)
- Q1. Suitable banch height for 2cu.m shovel is
- Ans.
The suitable bench height for a 2cu.m shovel depends on various factors such as the type of material being mined and the equipment used.
The bench height should be determined based on the reach and capacity of the shovel.
It should allow for efficient loading and dumping of material.
The bench height should also consider the stability and safety of the mining operation.
Factors like the type of material, equipment limitati...
- Q2. The max width of the gallery in Indian coal mines is
- Ans.
The maximum width of the gallery in Indian coal mines varies depending on the specific mine and its regulations.
The maximum width of the gallery is determined by safety regulations and guidelines set by the Indian government.
Different coal mines may have different maximum width requirements based on factors such as the type of coal being mined, the depth of the mine, and the mining method used.
For example, in undergrou...
- Q3. The max length of the trailing cable is
- Ans.
The maximum length of the trailing cable depends on various factors such as power requirements, voltage drop, and safety regulations.
The length of the trailing cable is determined by the distance between the power source and the equipment it needs to supply.
Power requirements of the equipment play a role in determining the maximum length of the cable.
Voltage drop, which can affect the efficiency of power transmission, ...
- Q4. Detonating fuse consist core of
- Ans.
Detonating fuse consists of a core
The core of a detonating fuse is the central part that initiates the explosion
The core is typically made of a highly reactive material, such as a mixture of powdered metals or chemicals
The core is surrounded by a protective casing to prevent accidental ignition
Examples of core materials include lead azide, mercury fulminate, or PETN
- Q5. The VOD of detonating fuse is
- Ans.
The VOD of detonating fuse is the velocity at which the detonation wave travels along the fuse.
VOD stands for Velocity of Detonation.
It is a measure of how fast the detonation wave propagates through the fuse.
The VOD of a detonating fuse depends on factors such as the type of explosive used and the composition of the fuse.
A higher VOD means the detonation wave travels faster, resulting in a quicker explosion.
Different ...
- Q6. Safety fuse consist core of
- Q7. In the detonator the priming charge is
- Ans.
The priming charge in a detonator is the initial explosive charge that initiates the main explosive charge.
The priming charge is a small amount of explosive material that is sensitive to heat, shock, or friction.
It is designed to ignite quickly and reliably to initiate the main explosive charge.
The priming charge is usually contained within a small metal or plastic capsule.
Examples of priming charges include lead azide...
- Q8. Sheathed explosive coated with a sheath of
- Ans.
A sheathed explosive is coated with a protective covering.
The sheath provides a layer of protection to the explosive material.
The sheath can be made of materials like plastic or rubber.
The purpose of the sheath is to prevent accidental ignition or detonation.
Examples of sheathed explosives include dynamite and blasting caps.
- Q9. The ANFO the water content should not be more than
- Q10. The gelling agent in slurry explosive is
- Ans.
The gelling agent in slurry explosive is typically a mixture of water and a thickening agent.
The gelling agent is used to increase the viscosity of the explosive mixture.
Common thickening agents used in slurry explosives include guar gum, carboxymethyl cellulose (CMC), and xanthan gum.
The gelling agent helps to suspend solid particles in the explosive mixture, allowing for better distribution and control of the explosi...
- Q11. The VOD of emulsion explosive is
- Ans.
The VOD of emulsion explosive refers to its Velocity of Detonation.
VOD is a measure of how fast the explosive reaction propagates through the material.
It is an important characteristic for determining the efficiency and safety of explosive materials.
Higher VOD explosives are typically used for blasting hard rock formations.
Lower VOD explosives are used in situations where a controlled and less destructive explosion is
- Q12. The shovel can dig below ground upto
- Q13. The output capacity of the dragline with 4.5 to 7.5 cu.m is million cu.mper year
- Ans.
The output capacity of the dragline with 4.5 to 7.5 cu.m is in million cu.m per year.
The output capacity of the dragline depends on the size of the bucket it uses.
A larger bucket size allows for a higher output capacity.
The dragline's efficiency and operating conditions also affect its output capacity.
The output capacity can be calculated by considering the average number of cycles per hour and the bucket fill factor.
F...
Interview Preparation Tips
Top trending discussions
Interview questions from similar companies
Selected
I applied via Walk-in
(2 Questions)
- Q1. Mines blasting regarding
- Q2. Working related question for ocp mining
Interview Preparation Tips
- Blasting
Graduate Engineer Trainee (Get) Interview Questions & Answers
Reliance Industries
Anonymous
posted on 14 Jan 2015
Interview Preparation Tips
Experience: A test consisting of 50 questions of which 30 were core questions and the other 20 wereaptitude ones. It had negative marking.The aptitude questions were similar to CAT questions but much easier.
Total Questions: 50
Round: Interview
Experience: One round of interview including a technical round.Technical questions were asked and a thorough knowledge of core was necessary.No separate HR round, but basic HR questions were asked.Questions on BTPs and relevant technical details were asked
Tips: Thorough core preparation on concentrated selected areas of turbo machines, Hydraulics, DOME is necessary.
Skill Tips: ""
College Name: IIT Madras
Graduate Engineer Trainee (Get) Interview Questions & Answers
Reliance Industries
Suyash Jain
posted on 14 Mar 2015
Interview Preparation Tips
Tips: Make a good Core Resume if you are targetting this company
Round: Test
Experience: The paper was same for Mechanical and Metallurgy students.
Tips: A basic understanding of the mechanics and the various material properties like elasticity, stress-strain curve etc. will help you a lot in clearing the test.
Round: HR Interview
Experience: It was good. Basic HR questions were asked and a few questions relating to the current affairs as well were asked.
Tips: Decent HR prep required.
Round: Technical Interview
Experience: Reasonably well.
Tips: In depth knowledge of the projects and technical work(s) mentioned in the resume/spoken of in the interview is necessary.
General Tips: Be Yourself, Have confidence, Have a thorough understanding of your field (as a lot is asked of it in the interview) with a decent HR preparation and Crack the Job.
Skills: Articulation skills, Technical Background, Understanding Ability, Confidence
College Name: IIT Bombay
Management Trainee Interview Questions & Answers
Reliance Industries
haseen Siddiqui
posted on 22 Mar 2015
Interview Questionnaire
5 Questions
- Q1. Tell me about yourself
- Ans.
I am a motivated and hardworking individual with a passion for learning and growth.
I have a Bachelor's degree in Business Administration
I have completed internships in marketing and finance
I am proficient in Microsoft Office and have experience with project management software
I am a team player and enjoy collaborating with others to achieve common goals
I am always looking for opportunities to develop new skills and tak
- Q2. Tell me about the work which you have done at NCL
- Ans.
I worked as a research assistant at NCL, where I conducted experiments and analyzed data.
Conducted experiments in the lab
Analyzed data using statistical software
Assisted in writing research papers
Presented research findings at conferences
Collaborated with other researchers on projects
- Q3. Tell me your favorite subject
- Ans.
My favorite subject is Mathematics.
I enjoy solving complex problems and equations.
I find satisfaction in finding the correct answer.
Mathematics is a universal language that can be applied in various fields such as science, engineering, and finance.
- Q4. What is Bernoulli Equation?
- Ans.
Bernoulli Equation is a fundamental principle in fluid dynamics that relates the pressure, velocity, and height of a fluid.
It describes the conservation of energy in a fluid system.
It is used to calculate the flow rate of fluids through pipes and channels.
It is applicable to both incompressible and compressible fluids.
It is commonly used in aviation to explain the lift force on an airplane wing.
The equation is P + 1/2p...
- Q5. One problem on Bernoulli application
Interview Preparation Tips
Experience: I basically am in core therefore my main focus was towards core projects and core internship.
Tips: Prepare very well each and every point which is there in your resume. Make short and informative resume.
Round: Test
Experience: Aptitude section contains 30 questions for 30 minutes and remaining are from core part. Aptitude questions were from simple mathematics which we were used to do in our schools. Some of them were from English vocabulary.In core part the questions were basically from distillation column, thermodynamics, fluid mechanics and Heat and mass transfer.
Tips: Try to solve online aptitude paper keeping time limit in mind. For core part revise portion of Heat and mass transfer, fluid mechanics, thermodynamics very carefully. (Mostly use of Bernoulli Equation, Mccabe thiele design of DC, First and second law of thermodynamics.)
Duration: 60 minutes
Total Questions: 80
Round: Other Interview
Experience: It was good. Initially I was nervous but later it was fine. Questions were asked from HR, resume as well as from core section.
Tips: 1) Prepare your resume very well and justify your each point in your resume.2) Prepare some HR questions like tell me about yourself, short terms and long terms goal etc.3) Have a smile on your face4) Listen the questions carefully, think for sometime and then answer.
General Tips: 1) Be responsible towards your studies and do not fool yourself2) Attend all classes3) Maintain good communication skills
Skill Tips: 1) Maintain good CPI ( above 8)2) You should be able to justify your work which you have written in your resume.
Skills: Knowledge of your field, Sincerity
College Name: IIT BOMBAY
Motivation: The main motivation for the company is my interest in core field and this company will give me a huge platform to work with my skills and knowledge.
Graduate Engineer Trainee (Get) Interview Questions & Answers
Reliance Industries
Navratan Kedia
posted on 27 Mar 2015
Interview Questionnaire
3 Questions
- Q1. Tell me about ur project
- Q2. Asked ques from training(go through training properly)
- Q3. Ques from transformer , induction machine and its protection
Interview Preparation Tips
Experience: It was fine...
Tips: Be fast and accurate...practice ques from R S Agarwal,for technical just take easy u have not mug up the things ques is quite easy.
Total Questions: 60
Round: Technical Interview
Experience: It was an half hour interview...I explained all the things in a proper manner.
Tips: Be calm and comfortable,go through ur resume in a proper manner.
General Tips: Believe in urself....cpi should be greater than 7
College Name: NIT ALLAHABAD
Motivation: It is an oil industry so it has a vast scope in future.
Funny Moments: Have a little discussion about Lalu prasad yadav
Graduate Engineer Trainee (Get) Interview Questions & Answers
Reliance Industries
Avinav Prakash
posted on 30 Mar 2015
Interview Questionnaire
12 Questions
- Q1. 1. Some basic Qs on Fluid like: which pump would you use for high head? On what parameters efficiency of pump depend?
- Q2. 2. What were the unit operations used in the plant I did my summer training?
- Ans.
The unit operations used in the plant during summer training.
Distillation
Filtration
Crystallization
Extraction
Drying
Mixing
- Q3. 3. A numerical on Black body radiation. There are 2 bodies one absorbing 0.4 of others’ energy and the other absorbing .6 by another. (I had solved the Q by view factor method)
- Q4. 4. Some Qs on design of heat exchanger. How would the heat transfer coefficient change when baffle spacing is changed? What are other such important factors?
- Ans.
Heat transfer coefficient changes with baffle spacing in heat exchangers. Other important factors include fluid properties, flow rate, and surface roughness.
Heat transfer coefficient increases with decreasing baffle spacing
Fluid properties such as viscosity and thermal conductivity affect heat transfer
Higher flow rates can increase heat transfer coefficient
Surface roughness can affect heat transfer by creating turbulen
- Q5. 5. What is catalytic hydrocracking? And related Qs. Whether it is endothermic or exo?
- Q6. 6. What is the significance of Viscosity Index of lube?
- Ans.
Viscosity Index of lube measures its resistance to change in viscosity with temperature.
Viscosity Index (VI) is an important property of lubricating oils.
It measures the oil's ability to maintain its viscosity under different temperature conditions.
Higher VI means the oil's viscosity changes less with temperature, indicating better performance.
VI is calculated using kinematic viscosity measurements at two different tem...
- Q7. What are the different kinds of distillation you know?
- Ans.
Different kinds of distillation include simple distillation, fractional distillation, steam distillation, and vacuum distillation.
Simple distillation is used to separate liquids with different boiling points.
Fractional distillation is used to separate liquids with similar boiling points.
Steam distillation is used to extract essential oils from plants.
Vacuum distillation is used to separate liquids with high boiling poi...
- Q8. What factors will you take in consideration to check evaporator efficiency?
- Ans.
Factors to consider for checking evaporator efficiency
Temperature difference between inlet and outlet air
Airflow rate
Refrigerant flow rate
Frost buildup on evaporator coils
Cleanliness of evaporator coils
Type of refrigerant used
- Q9. Tell us about yourself
- Ans.
I am a highly motivated individual with a passion for learning and a strong work ethic.
I have a Bachelor's degree in Computer Science
I have completed several internships in software development
I am proficient in multiple programming languages including Java and Python
I enjoy working in a team environment and collaborating on projects
I am always looking for new challenges and opportunities to grow
- Q10. 2. Why would I like to move to Gujarat?
- Ans.
Gujarat offers a rich cultural heritage, diverse cuisine, and a thriving business environment.
Gujarat is home to several UNESCO World Heritage Sites such as the Rani ki Vav stepwell and the Champaner-Pavagadh Archaeological Park.
The state is known for its delicious cuisine, including dishes like dhokla, thepla, and fafda.
Gujarat has a strong economy, with a focus on industries such as textiles, chemicals, and pharmaceu...
- Q11. 3. Do you think you can inspire?
- Ans.
Yes, I believe I can inspire others through my actions and words.
I have a positive attitude and outlook on life
I am passionate about my work and hobbies
I enjoy helping others and sharing my knowledge and experiences
I have received positive feedback and recognition for my leadership and motivational skills
- Q12. 4. Convince me under 3 minutes why we should take you.
- Ans.
I have the skills, experience, and passion to excel in this role.
I have a proven track record of success in similar roles.
I am highly motivated and dedicated to achieving results.
I have excellent communication and interpersonal skills.
I am a quick learner and adaptable to new situations.
I am passionate about this industry and eager to contribute my expertise.
I am confident that I can make a valuable contribution to you
Interview Preparation Tips
Experience: Aptitude:
Time was short. 3O Qs in 30 minutes was a time-crunch. As my aptitude is weak, I had put in prior efforts to put up a decent performance. I could solve around 14-15 Qs in that time.
Technical:
50 Qs in 30 minutes. The Qs were fairly on easier side. Just that, Qs spanned all across chemical engineering, with almost equal weightage on all topics. Most Qs were from past years' GATE papers. I attempted around 40 Qs.
Tips: 1. For aptitude, prepare well in advance if you are weak.
2. Strengthen technical by solving MCQs from Indiabix.com
3. Since there are no negatives, go for most Qs.
Duration: 60 minutes
Total Questions: 80
Round: Technical Interview
Experience: I had a good technical interview. Most of the Qs were logical. The interviewer made sure I was comfortable through out the interview, each Qs was followed by a light Q.
Tips: 1. Be cool as a cucumber. 2. Be thorough with all subjects.3. If you think you don't know answer, think logically.4. Try to deviate the Qs to your strengths.
Round: HR Interview
Experience: It was the most relieving interview ever! It was very jovial and open-hearted interview.
Tips: 1. Again, be cool
2. Work on your speaking skills.
3. Know yourself well.
General Tips: Prepare for each, well in advance.
Skills: Technical skills., Speaking skills
College Name: NIT DURGAPUR
Motivation: It was one of the finest to be recruiting from Chemical.
Funny Moments: The HR interviewer asked me why does each member of my family have a different surname.
And he got very emotional when I told him I am from Odisha, because that reminded him of how his old Odia friend used to feed him Odia dishes.
Graduate Engineer Trainee (Get) Interview Questions & Answers
Reliance Industries
Aayush Agarwal
posted on 3 Apr 2015
Interview Questionnaire
6 Questions
- Q1. Tell me about yourself?
- Q2. Why do u want to join RIL?
- Q3. Why the gibbs free energy is called free energy?
- Ans.
Gibbs free energy is called free energy because it is the energy available to do work at constant temperature and pressure.
Gibbs free energy is the maximum amount of work that can be obtained from a system at constant temperature and pressure.
It takes into account both the enthalpy and entropy of a system.
If the Gibbs free energy is negative, the reaction is spontaneous and can do work.
Examples include the combustion o...
- Q4. What are the maxwell's equations?
- Ans.
Maxwell's equations describe the behavior of electromagnetic fields.
There are four equations: Gauss's law, Gauss's law for magnetism, Faraday's law, and Ampere's law with Maxwell's addition.
Together, these equations explain how electric and magnetic fields interact and propagate through space.
Maxwell's equations are fundamental to the study of electromagnetism and have many practical applications, such as in the design...
- Q5. Some questions from conduction
- Q6. Designing of Distillation Column?
- Ans.
Designing of Distillation Column
Determine the desired separation
Select the appropriate column type
Calculate the number of theoretical plates
Determine the feed location and reflux ratio
Design the reboiler and condenser
Select appropriate materials of construction
Consider safety and environmental factors
Interview Preparation Tips
Experience: Overall it is a balanced paperIn aptitude, No of questions is 30 in 30 min. most of the question were easy and mostly they are from topics like work, speed, time, distance, series. Some questions are from English like word meaning, antonym, synonym etc.In technical, no. of questions is 50 in 30 min. The questions were from whole of the chemical engg like from thermo, mass, heat, cre but not from process control or instrumentation or from chemical technology. Most of the questions were conceptual and are just theoretical.
Tips: For apti, try to solve questions from www.indiabix.comFor technical, brush up ur conceptual knowledge and try to learn more and more of mass, heat, themo and cre.
Duration: 60 minutes
Total Questions: 80
Round: Technical Interview
Experience: Overall my interview experience is good. I gave around 70 percent of the answers. My interview is purely technical but it was not so with my friend. His interview is 90% HR.So u never know what type of interview u r going to face when u walk in there.In my interview the questions were mostly asked from thermodynamics and its applications.
Tips: Be calm and confident.Try not to get nervous.Never try to attempt the questions of which u don't know the answers. Attempting those questions and thereafter not giving answers properly gives a bad impression.
General Tips: As I previously told try to remain calm and not get nervous.If u do so no one can take that job from u.And by chance u don't get selected, then do not get disheartened and just think about ur mistakes and try to improve them as U are the best judge of yourself.
Skill Tips: Do not get nervous in the interview.Do not try to solve the whole technical paper rather go through it and attempt the questions u think u can do.For improving communication skill, try to communicate with ur friends in English. Read newspaper and communicate with urself in mirror ( this method will particularly help u a lot in improving ur communication skills and will also free u from any kind of presentation fears).
Skills: Confidence, Time Management, Communication
College Name: MNIT
Motivation: yeah RIL is a very good company, very large and with a lot of scope.So just go for it as if u want to build ur repo then it is one of the best platform to do so.
Funny Moments: one of my friend got injured before the interview. So when he entered for the interview,HR saw his hand and asked what happened. So he hold HR that he got slipped on stairs. After that HR said to him "khudko ko sambhal nhi pa rhe company ko kya sambhaloge".. So try not to lose ur senses if u face such kind of things .They just purposely do that to check how u can perform under pressure.And that friend of mine was also selected for the job.
Graduate Engineer Trainee (Get) Interview Questions & Answers
Reliance Industries
Harsh Verma
posted on 14 Jan 2015
Interview Questionnaire
7 Questions
- Q1. NDT
- Q2. Microstructure
- Q3. Corrosion
- Q4. Welding
- Q5. Comapany Related
- Q6. Steel heat treatment
- Q7. Intern Extensive
Interview Preparation Tips
Experience: Easy to intermediate level questions
Tips: Keep your calm
Duration: 45 minutes
Total Questions: 60
Round: Test
Experience: Easy to intermediate level questions
Duration: 45 minutes
Total Questions: 60
Round: Technical Interview
Experience: Mostly definitions of important terms
Rather chill,no stress cross-questions
Tips: Prepare your core well and you will be easily able to crack the interview
Round: Final selection
Experience: It is based on your test scores as well as your interview so do yoir best on both.
Tips: All the best!!
General Tips: Sleep well,eat well
College Name: IIT BOMBAY
Motivation: Largest private sector company in India
Graduate Engineer Trainee (Get) Interview Questions & Answers
Reliance Industries
SNEHIL PANDEY
posted on 17 Jan 2015
Interview Questionnaire
3 Questions
- Q1. Tell me something about yourself
- Q2. Questions related to internships, projects and BTP
- Q3. Some basic mechanical engineering questions
Interview Preparation Tips
Experience: The main courses in mechanical engineering from which they ask questions are:
IC Engine
Fluid Mechanics
Strength Of Material
Turbo Machinery
There was no group discussion.
Two rounds of interview: Test and PI
There was no HR round.
Tips: Be well prepared with your resume
Try to start your interview really well
Be prepared with the fundamentals for technical questions
General Tips: Start preparing atleast 2-3 monts in advance
Brush up your fundamentals of the core subject
Take more numbers of mock GD's and PI's
Read HR questions and relevent course work for non core companies
College Name: IIT Madras
Coal India Interview FAQs
Recently Viewed
JOBS
Navi Technologies
No Jobs
INTERVIEWS
Navi Technologies
No Interviews
INTERVIEWS
Coal India
50 top interview questions
INTERVIEWS
Coal India
No Interviews
SALARIES
Agility E Services
INTERVIEWS
Arcesium
No Interviews
SALARIES
Coal India
SALARIES
Agility E Services
INTERVIEWS
Arcesium
No Interviews
LIST OF COMPANIES
Coal India
Locations
Tell us how to improve this page.
Coal India Interviews By Designations
- Coal India Management Trainee Interview Questions
- Coal India Graduate Engineer Trainee (Get) Interview Questions
- Coal India Management Trainee Mining Interview Questions
- Coal India Deputy Manager Interview Questions
- Coal India Engineer Interview Questions
- Coal India Accountant Interview Questions
- Coal India Software Engineer Interview Questions
- Coal India Assistant Manager Interview Questions
- Show more
Interview Questions for Popular Designations
- Overhead Crane Operator Interview Questions
- Overman Interview Questions
- Mining Engineer Interview Questions
- Mining Mate Interview Questions
- Junior Mining Engineer Interview Questions
- Senior Mining Engineer Interview Questions
- Mining Engineer Trainee Interview Questions
- Overseas Education Consultant Interview Questions
- Show more
Interview Questions from Similar Companies
Fast track your campus placements
|
Assistant Manager
192
salaries
|  ₹0 L/yr - ₹0 L/yr |
|
Deputy Manager
122
salaries
| ₹0 L/yr - ₹0 L/yr |
|
Management Trainee
53
salaries
| ₹0 L/yr - ₹0 L/yr |
|
Assistant Manager Finance
34
salaries
| ₹0 L/yr - ₹0 L/yr |
|
Deputy Manager - Finance
34
salaries
| ₹0 L/yr - ₹0 L/yr |
Oil And Natural Gas Corporation
Steel Authority Of India
Bharat Petroleum
Hindustan Petroleum
- Home >
- Interviews >
- Coal India Interview Questions >
- Coal India Mining Overman Interview Questions
