Coal India Interview Questions, Process, and Tips

Copper loss in a transformer decreases when it operates at half its rated MVA.

• Copper loss is directly proportional to the square of the current flowing through the windings.

• When the transformer operates at half its rated MVA, the current flowing through the windings is reduced.

• As a result, the copper loss in the transformer decreases.

• This reduction in copper loss leads to improved efficiency and lower energy consumptio

A wound rotor induction motor can provide high starting torque and high efficiency.

• Wound rotor induction motors have a higher starting torque compared to squirrel cage induction motors.

• The rotor windings in a wound rotor motor can be connected to external resistors, allowing for higher torque during startup.

• By adjusting the resistance in the rotor circuit, the motor can achieve high efficiency at full load.

• Examples of ...read more

I am a highly motivated individual with a passion for learning and growth.

• I have a Bachelor's degree in Business Administration

• I have completed several internships in the field of marketing and sales

• I am a quick learner and enjoy taking on new challenges

• I am a team player and enjoy collaborating with others to achieve common goals

A haul road is a road used for transporting materials, typically in a mining or construction site.

• Haul roads are designed to handle heavy loads and are often unpaved.

• They are used to transport materials such as ore, rock, and dirt.

• Haul roads must be maintained regularly to ensure safety and efficiency.

• Proper drainage is important to prevent erosion and maintain road stability.

• Examples of haul road equipment include hau

A flame safety lamp is a type of lamp used in mining to detect methane gas and prevent explosions.

• It works by creating a flame inside a mesh screen that will go out if methane is present.

• The lamp was invented by Sir Humphry Davy in 1815.

• It was widely used in coal mines in the 19th and early 20th centuries.

• Today, electronic gas detectors have largely replaced flame safety lamps in mining.