Western Coalfields Chief Manager Interview Questions and Answers

Mining is the process of extracting valuable minerals or other geological materials from the earth's surface or underground.

• Mining is done to obtain various resources such as coal, gold, diamonds, and metals like iron, copper, and aluminum.

• It involves the removal of soil, rocks, and other materials to access the desired minerals.

• Mining can be categorized into surface mining and underground mining, depending on the loca...read more

Safety devices of Direct Haulage include emergency stop buttons, warning signals, and safety barriers.

• Emergency stop buttons are installed at regular intervals along the haulage route.

• Warning signals such as flashing lights and alarms are used to alert workers of approaching haulage equipment.

• Safety barriers are used to prevent workers from entering hazardous areas.

• Proximity detection systems are used to detect the pre...read more

The calorific value of coal varies depending on the type of coal, but typically ranges from 24 to 30 megajoules per kilogram.

• Calorific value is the amount of heat released when a substance is burned.

• It is measured in units of energy per unit of mass, such as joules per gram or megajoules per kilogram.

• The calorific value of coal can vary depending on factors such as moisture content, ash content, and sulfur content.

• For ...read more

Portable machines can be easily carried around, while transportable machines require disassembly and reassembly for transportation.

• Portable machines are designed to be easily moved from one location to another without much effort.

• Transportable machines require disassembly and reassembly for transportation.

• Portable machines are usually smaller and lighter than transportable machines.

• Examples of portable machines include...read more