Durga Infra Mining Interview Questions and Answers

Draw three shafts with different diameters and specified length.

• Use a ruler and a compass to draw the shafts accurately.

• Label each shaft with its diameter and length.

• Ensure that the shafts are proportional to each other.

• Consider the material and application of the shafts when selecting diameters.

• Check the shafts for any defects or imperfections before use.

BT40 and BT50 are terms used in the field of machining and refer to the type of tool holder used in CNC machines.

• BT40 and BT50 are standardized tool holder systems used in CNC machining.

• They are named after the taper size of the tool holder, which determines the compatibility with the machine spindle.

• BT40 has a taper size of 40 and BT50 has a taper size of 50.

• The tool holders are used to securely hold cutting tools in the machine spindle.

• Different tool holders are required fo...read more

Up milling and down milling are two types of milling operations used in machining.

• Up milling is also known as conventional milling, where the cutter rotates against the direction of feed.

• Down milling is also known as climb milling, where the cutter rotates in the same direction as the feed.

• Up milling produces a rougher surface finish and generates more heat, while down milling produces a smoother surface finish and generates less heat.

• Up milling is preferred for tough materia...read more

1kcal is the amount of energy required to raise the temperature of 1 kilogram of water by 1 degree Celsius.

• 1kcal is a unit of energy measurement.

• It is commonly used to measure the energy content of food.

• 1kcal is equal to 1000 calories.

• Calories are a measure of the amount of energy in food.

• The energy content of food is usually measured in kilocalories (kcal) or kilojoules (kJ).

Tools can fall due to various reasons such as improper storage, lack of maintenance, human error, and environmental factors.

• Improper storage or handling of tools

• Lack of maintenance or inspection of tools

• Human error such as dropping or mishandling the tool

• Environmental factors such as vibrations or unstable surfaces

• Inadequate training or experience of the user

Pascal's law states that pressure applied to a fluid in a closed container is transmitted equally in all directions.

• Pressure applied to a fluid in a closed container is transmitted equally in all directions

• The pressure applied to a fluid is directly proportional to the force applied

• This law is used in hydraulic systems to transmit force and pressure

• Examples include car brakes and hydraulic lifts