Adani Enterprises Mining Engineer Interview Questions and Answers

There are four main types of coal: anthracite, bituminous, subbituminous, and lignite.

• Anthracite is the highest rank of coal and is known for its high carbon content and low moisture and volatile matter.

• Bituminous coal is the most commonly used type and is known for its relatively high heat content.

• Subbituminous coal has a lower carbon content than bituminous coal and is commonly used for electricity generation.

• Lignite...read more

There are several types of gases found in underground mines, including methane, carbon monoxide, hydrogen sulfide, and nitrogen.

• Methane is the most common gas found in underground mines and is highly flammable.

• Carbon monoxide is a deadly gas that can be produced during mining operations.

• Hydrogen sulfide is another toxic gas that can be present in underground mines.

• Nitrogen is often used in mining operations to displace

Mining is the process of extracting valuable minerals or other geological materials from the earth.

• Mining involves drilling, blasting, and extracting minerals from the earth's surface or underground.

• It is essential for the production of various resources like coal, gold, copper, and diamonds.

• Mining can have environmental impacts such as habitat destruction and water pollution.

• Technological advancements have made mining...read more

There are typically three ways to come out in underground mines: shaft, adit, and decline.

• Shaft: Vertical tunnel used for hoisting ore and personnel.

• Adit: Horizontal tunnel used for access to the mine.

• Decline: Inclined tunnel used for moving equipment and ore.

• Examples: The Lucky Friday Mine has a shaft entrance, the Goldstrike Mine has an adit entrance, and the Grasberg Mine has a decline entrance.

Siemens controllers have different parameters for various applications.

• Siemens controllers have different parameters for motion control, temperature control, and process control.

• Parameters for motion control include acceleration, deceleration, and maximum velocity.

• Parameters for temperature control include setpoint, proportional band, and integral time.

• Parameters for process control include setpoint, deadband, and gain...read more

Fanuc has different parameters for various functions such as motion control, spindle control, and tool management.

• Fanuc parameters are used to control various functions such as motion control, spindle control, and tool management.

• Parameters can be set to adjust the speed, acceleration, and deceleration of the machine.

• Fanuc parameters can also be used to set up alarms and diagnostic messages.

• Examples of Fanuc parameters...read more

PLCs are used in various industries for automation and control purposes.

• PLCs are commonly used in manufacturing industries for controlling assembly lines and machines.

• They are also used in the automotive industry for controlling robotic arms and conveyor belts.

• PLCs are used in the food and beverage industry for controlling mixing and packaging machines.

• They are used in the energy sector for controlling power plants and...read more

VFDs are used to control the speed of AC motors in various applications.

• VFDs are commonly used in HVAC systems to control the speed of fans and pumps.

• They are also used in industrial applications to control conveyor belts and other machinery.

• VFDs can improve energy efficiency and reduce wear and tear on equipment.

• They are often used in renewable energy systems to control the speed of wind turbines and solar panels.

• VFDs...read more

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...read more

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...read more

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, ...read more

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

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 ...read more

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...read more

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.

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...read more

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

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...read more

I follow a systematic approach, prioritize tasks, communicate effectively, and adapt to changing conditions.

• Prioritize tasks based on importance and deadlines

• Communicate effectively with team members and supervisors

• Adapt to changing conditions and adjust plans accordingly

Board and pillar method is a mining technique where a network of rooms is created with pillars of ore left in place to support the roof.

• Involves creating a network of rooms separated by pillars of ore

• Pillars are left in place to support the roof

• Commonly used in coal mining

• Allows for efficient extraction of ore while maintaining structural integrity of the mine

Gasiness refers to the presence of gas in a substance or environment.

• Gasiness can be measured by the amount of gas present in a given volume of a substance.

• In mining, gasiness is important to monitor in underground mines to prevent explosions.

• Common gases found in mines include methane, carbon monoxide, and hydrogen sulfide.