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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
Interview questions from similar companies
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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
Adani Enterprises
Anonymous
posted on 29 Jun 2017
I was interviewed in Apr 2017.
Interview Questionnaire
1 Question
- Q1. Introduce myself
- Ans.
I am a recent graduate with a degree in Mechanical Engineering, passionate about problem-solving and eager to learn and grow in the field.
Recent graduate with a degree in Mechanical Engineering
Passionate about problem-solving
Eager to learn and grow in the field
Interview Preparation Tips
Experience: General Aptitude Test, Technical Aptitude Test . 30 questions in each section. there was section wise cut off.
Tips: complete in time
Duration: 1 hour 30 minutes
Total Questions: 90
Round: Group Discussion
Experience: Around 10 of us selected in the first round were asked to sit in a group and discuss about the given topic. There were two people marking our score based on the way of communicating and the points we were making.
Tips: try to conclude or initiate the discussion
Duration: 15 minutes
Round: HR Interview
Experience: The first question was to introduce myself in such a way that they can know all important things about me in 2 mins. After general introduction, I included my software skills and trips to other colleges. Then they started asking about Surpac and my project. Some were related to Shovel capacity. Lastly, I was asked whether I could live in remote rural areas.
My teacher once said "Keep the handle of your interview is in your hand. Once the interviewer starts driving, it is destined to crash." Take the interview in the direction where you are confident, be it your project or training report. Do not bluff there as it may backfire. It is okay if you say "I DON'T KNOW" to few questions rather than bluffing.
Tips: Be prepared for the normal questions and keep calm in the interview. Many interviewers want their candidate to be confident.
College Name: NIT Raipur
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
Anonymous
posted on 6 Dec 2016
I applied via Campus Placement and was interviewed in Dec 2016. There were 4 interview rounds.
Interview Preparation Tips
Experience: The test consists of two sections. First section is Aptitude and it has 30 questions (30 minutes). This section has questions on numerical ability, logical reasoning and verbal ability. Each question carries 2 marks and no negative marks. Second section is technical section and this section has 50 questions and each one carries 1 mark (30 minutes). For mechanical engineering stream, the questions were asked mainly from materials science, strength of materials. Remaining questions were asked from other core subjects. All the technical questions were theoretical questions and no problem solving.
Tips: Briefly touch up all the core mechanical subjects and you will be through the test.
Duration: 1 hour
Round: Technical + HR Interview
Experience: Firstly, a form was given before the interview. In the form, they asked us to fill all our bio data, projects we have done and some basic HR questions. There's only one interviewer. The first question was "Tell me about yourself". He asked based on what we have written in the form. He asked about my goals, role model and also about the company. He mostly checked whether I am interested in the company or not.
Feedback from others - Projects, Interns and technical questions on material science.
Skills: Managerial, Communication
College Name: IIT Madras
Graduate Engineer Trainee (Get) Interview Questions & Answers
Reliance Industries
Anonymous
posted on 6 Dec 2016
I applied via Campus Placement and was interviewed in Dec 2016. There were 3 interview rounds.
Interview Preparation Tips
Experience: The test was for 1 hour . It consisted of aptitude and technical sections each for 30 mins. Technical was of gate level questions and aptitude was a basic math test with some verbal ability questions.
Duration: 1 hour
Round: HR Interview
Experience: It was a basic HR interview for about 30 minutes. And mostly the selection was based on the test scores so if you have done well in the test you are almost selected for the job
College Name: IIT Madras
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