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PNB MetLife Interview Questions and Answers

Updated 5 Feb 2024

Q1. Draw the shaft for three different diameters and having certian length ?

Ans.

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.

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Q2. What are the terms BT40, BT50 etc ?

Ans.

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

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Q3. Tell me about Up milling and down milling

Ans.

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

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Q4. What is 1kcal ? Or What is calorie?

Ans.

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).

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Q5. What are the causes of tool falling ?

Ans.

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

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Q6. What is law of Pascal ?

Ans.

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

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Q7. What is cnc in manufacturing

Ans.

CNC stands for Computer Numerical Control. It is a manufacturing process that uses computerized machines to produce precise and complex parts.

  • CNC machines are programmed using software to control the movement of cutting tools.

  • They can produce parts with high accuracy and consistency.

  • CNC machines are used in various industries such as aerospace, automotive, and medical.

  • Examples of CNC machines include lathes, mills, routers, and plasma cutters.

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