Nirlep Appliances Interview Questions, Process, and Tips

Q1. Least count of vernier caliper
Ans. 
The least count of a vernier caliper is the smallest measurement that can be read on the scale.
• The least count is determined by the number of divisions on the main scale and the vernier scale.

• It is calculated as the difference between one smallest division on the main scale and one division on the vernier scale.

• For example, if the main scale has divisions of 1 mm and the vernier scale has 10 divisions that cover 9 main...read more
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Q2. What is tolerance?
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Tolerance refers to the acceptable range of variation in a measurement or specification.
• Tolerance allows for slight differences in dimensions or characteristics without affecting the overall quality of a product.

• It is important in manufacturing to ensure that parts fit together properly and function as intended.

• Tolerance can be specified as a numerical value or a percentage of the desired measurement.

• For example, a par...read more
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Q3. What is elasticity and plasticity?
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Elasticity is the ability of a material to return to its original shape after being stretched or compressed, while plasticity is the ability of a material to permanently deform under stress.
• Elasticity is the property of a material to regain its original shape after being deformed.

• Plasticity is the property of a material to undergo permanent deformation when subjected to stress.

• Rubber is an example of a material with hi...read more
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Q4. Explain stress strain diagram
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Stress strain diagram shows the relationship between stress (force applied) and strain (resulting deformation) in a material.
• Stress is the force applied to a material per unit area.

• Strain is the resulting deformation or change in shape of the material.

• The diagram typically shows a linear elastic region, a yield point, and a plastic deformation region.

• Materials exhibit different behaviors on the diagram, such as brittle...read more
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Q5. Manufacturing process
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Q6. What is stress and strain?
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Stress is the force applied to a material, while strain is the resulting deformation or change in shape.
• Stress is measured in force per unit area (e.g. N/m^2 or Pa)

• Strain is a dimensionless quantity representing the amount of deformation

• Stress and strain are related by the material's modulus of elasticity (Young's modulus)

• Stress can cause materials to deform, leading to strain

• Example: Stretching a rubber band causes st
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Q7. What is Stress formula
Ans. 
Stress formula is used to calculate the amount of force applied to a material per unit area.
• Stress = Force / Area

• The unit of stress is typically measured in Pascals (Pa) or pounds per square inch (psi)

• Stress can be tensile (stretching) or compressive (squeezing)

• Example: If a force of 100 N is applied to an area of 10 m^2, the stress would be 10 Pa
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Q8. Mechanical properties
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