Machine Shop Incharge Interview Questions and Answers

Steel is an alloy primarily made of iron and carbon, with varying amounts of other elements for enhanced properties.

• Main component: Iron (Fe) - typically 90-98% of steel's composition.

• Carbon (C) - usually 0.02% to 2.1%, which increases hardness and strength.

• Alloying elements - such as manganese (Mn), chromium (Cr), nickel (Ni), and molybdenum (Mo) to improve properties.

• Stainless steel contains at least 10.5% chromium for corrosion resistance.

• Tool steels may have higher carbon...read more

The mother of all machine tools is the lathe, essential for shaping materials in manufacturing.

• The lathe is used to rotate a workpiece against cutting tools.

• It can create cylindrical shapes, threads, and complex designs.

• Examples include wood lathes for furniture and metal lathes for precision parts.

• Lathes are foundational in machining, influencing the design of other tools.

Milling and turning are two common machining operations used to shape and cut materials.

• Milling involves rotating a cutting tool while the workpiece remains stationary, removing material to create a desired shape.

• Turning involves rotating the workpiece while a cutting tool removes material to create a cylindrical shape.

• Both operations can be performed manually or with the use of computer-controlled machines.

• Milling is often used for creating complex shapes, while turning is c...read more

Machine tools are powered devices used to shape or machine metal and other materials into desired forms.

• Types include lathes, milling machines, and drill presses.

• Lathes are used for turning operations to create cylindrical parts.

• Milling machines can perform various operations like cutting, drilling, and shaping.

• CNC (Computer Numerical Control) machines automate the machining process for precision.

• Examples of machine tools include band saws, grinders, and plasma cutters.

Elasticity is the ability of a material to return to its original shape after deformation.

• Elasticity measures how much a material deforms under stress.

• Hooke's Law states that stress is proportional to strain in elastic materials.

• Examples include rubber bands (high elasticity) and metals (moderate elasticity).

• Elastic limit is the maximum stress a material can withstand without permanent deformation.