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Coal India Interview Questions, Process, and Tips
Top Coal India Interview Questions and Answers
- Q1. 2. What is the difference in the speeds of camshaft and crankshaft?asked in Management Trainee interview
- Q2. The max width of the gallery in Indian coal mines isasked in Mining Overman interview
- Q3. What is transformerasked in Electrician interview
Coal India Interview Experiences
48 interviews found
Anonymous
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 Coal India Mining Overman Interview Questions and Answers
Mining Overman Interview Questions asked at other Companies
(5 Questions)
- Q1. What is substation use equipment
- Ans.
Substation use equipment refers to the various devices and tools used in a substation for power distribution and maintenance.
Substation transformers
Circuit breakers
Disconnect switches
Voltage regulators
Capacitor banks
Protective relays
- Q2. What is electricity
- Ans.
Electricity is the flow of electric charge through a conductor.
Electricity is the flow of electrons through a conductor
It is a form of energy that powers electrical devices
Electricity can be generated from various sources such as coal, wind, solar, and hydro
It is measured in units of volts, amps, and watts
- Q3. What is induction motor and functions
- Ans.
An induction motor is a type of AC motor that works on the principle of electromagnetic induction to convert electrical energy into mechanical energy.
Induction motors are commonly used in various industrial applications due to their simplicity, reliability, and low cost.
They consist of a stator (stationary part) and a rotor (rotating part) where the rotor is not connected to an external power source.
When an alternating...
- Q4. What is generator and functions
- Ans.
A generator is a device that converts mechanical energy into electrical energy. It functions by rotating a coil of wire within a magnetic field to produce electricity.
Generates electricity by converting mechanical energy into electrical energy
Consists of a coil of wire rotating within a magnetic field
Used in power plants, backup generators, and portable generators
- Q5. What is Transformers this function
- Ans.
Transformers function to change voltage levels in electrical systems.
Transformers increase or decrease voltage levels in electrical systems
Step-up transformers increase voltage for long-distance transmission
Step-down transformers decrease voltage for distribution to homes and businesses
Transformers help maintain power quality and efficiency in electrical grids
Selected
I was interviewed before Mar 2024.
Topics regarding the introduction or changes in the tax regime.
(2 Questions)
- Q1. Can you tell me about yourself?
- Q2. What are your strengths and weaknesses?
- Ans.
My strengths include attention to detail, strong analytical skills, and ability to work under pressure. My weaknesses include being overly critical of my own work and sometimes struggling with delegation.
Strengths: attention to detail
Strengths: strong analytical skills
Strengths: ability to work under pressure
Weaknesses: overly critical of my own work
Weaknesses: struggle with delegation
Deputy Manager - Finance Interview Questions asked at other Companies
Selected
I applied via Job Portal
(2 Questions)
- Q1. Heavy Earth moving machine
- Q2. Rear dumper is very powerful machine
(2 Questions)
- Q1. What is a safety
- Ans.
Safety is the practice of ensuring that people, equipment, and the environment are protected from harm or danger.
Safety involves following rules and procedures to prevent accidents and injuries
It includes wearing appropriate protective gear, such as helmets or safety vests
Regular maintenance of equipment and machinery is essential for safety
Safety also involves being aware of potential hazards and taking steps to mitig...
- Q2. What is hydraulic system
- Ans.
A hydraulic system is a technology that uses liquid to transmit force and energy.
Uses incompressible fluid to generate power
Consists of hydraulic fluid, pump, valves, cylinders, and motors
Commonly used in heavy machinery like dump trucks and excavators
Interview Preparation Tips
Dumper Operator Interview Questions asked at other Companies
Coal India interview questions for popular designations
Selected
I was interviewed in Jan 2025.
(2 Questions)
- Q1. Why choose coal India?
- Ans.
Coal India offers a challenging and rewarding work environment with opportunities for professional growth and development.
Coal India is a leading coal mining company in India with a strong reputation in the industry.
The company offers competitive salaries and benefits for its employees.
Working at Coal India provides the opportunity to contribute to the country's energy security and infrastructure development.
Coal India...
- Q2. What is your expectations?
Senior Medical Officer Interview Questions asked at other Companies
Get interview-ready with Top Coal India Interview Questions
Selected
It was quiet detailed
(2 Questions)
- Q1. Why Coal India?
- Ans.
Coal India is the largest coal-producing company in the world, with a strong market presence and growth potential.
Coal India has a dominant position in the coal industry, accounting for over 80% of India's coal production.
The company has a vast reserve base and a strong distribution network, ensuring a steady supply of coal to meet market demand.
Coal India has a history of consistent growth and profitability, making it...
- Q2. How can you add value from your previous exp?
- Ans.
I can add value from my previous experience by implementing successful marketing strategies, analyzing market trends, and building strong relationships with clients.
Implemented successful marketing strategies to increase sales by 20% in my previous role
Analyzed market trends to identify new opportunities for product development
Built strong relationships with clients resulting in a 30% increase in customer retention
Asst.Marketing Manager Interview Questions asked at other Companies
(2 Questions)
- Q1. How does working principal of fan utilised in mine
- Ans.
Fans are used in mines to provide ventilation and circulate air to maintain a safe and comfortable working environment for miners.
Fans are typically installed at the surface or underground to draw in fresh air and remove stale air from the mine workings.
The fan blades rotate to create airflow, which helps to dilute and remove harmful gases, dust, and fumes from the mine.
Proper ventilation with fans also helps to contro...
- Q2. Eloborate your final year project
(2 Questions)
- Q1. Are you flexible enough to be located in a remote location?
- Ans.
Yes, I am open to being located in a remote location for the right opportunity.
I am willing to relocate for the right job opportunity
I have experience working remotely or in different locations
I am adaptable and can thrive in new environments
- Q2. Why your second semester scores are low as compared to other semesters?
Design Engineer Interview Questions asked at other Companies
Selected
I applied via Recruitment Consulltant and was interviewed in Nov 2023. There were 3 interview rounds.
Profession and graduated personality and experience
Civil engineers subjected related questions and group discussion
Interview Preparation Tips
- Civil Engineering
- AutoCAD 2D
Apprentice Trainee Interview Questions asked at other Companies
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...
Top Coal India Management Trainee Interview Questions and Answers
Management Trainee Interview Questions asked at other Companies
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...
Top Coal India Management Trainee Interview Questions and Answers
Management Trainee Interview Questions asked at other Companies
SUBRATA BISWAS
I applied via Approached by Company
(2 Questions)
- Q1. 1.What is industry 4.0 2., what is ECC, what is edge computing, 3.what is TDI model, 4. what will you do if you are selected for general Manager,5. what is your plan in future.
- Ans.
Industry 4.0 is the fourth industrial revolution characterized by the integration of digital technologies into manufacturing processes.
Industry 4.0 refers to the use of automation, data exchange, and IoT in manufacturing.
ECC stands for Enterprise Core Component and is a framework for managing business processes in SAP systems.
Edge computing is a decentralized computing infrastructure that brings computation and data st...
- Q2. How long you are working in CIL head quarter. Ans 5 yrs.
Interview Preparation Tips
General Manager Interview Questions asked at other Companies
Top trending discussions
Coal India Interview FAQs
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 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
Coal India Interview Process
based on 28 interviews
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