ARI Network Services Interview Questions and Answers

Alloying elements in steel and their functions.

• Carbon - increases hardness and strength

• Chromium - improves corrosion resistance

• Manganese - improves toughness and hardenability

• Nickel - improves toughness and corrosion resistance

• Molybdenum - improves strength and toughness at high temperatures

• Vanadium - improves strength, toughness, and wear resistance

• Tungsten - improves wear resistance and toughness

• Silicon - improves strength and electrical conductivity

• Copper - improves corros...read more

Stress-strain curve for mild steel and yield point elongation explained.

• Mild steel has a linear elastic region followed by a yield point and then plastic deformation.

• Yield point elongation is the increase in length of the material beyond the yield point.

• It occurs due to the rearrangement of atoms in the crystal structure of the material.

• Yield point elongation can affect the ductility and toughness of the material.

• The stress-strain curve for mild steel shows the relationship b...read more

The tip of a cutting tool is typically made of a hard and durable material such as tungsten carbide or ceramic.

• Cutting tool tips are often replaceable

• The material used for the tip depends on the application

• The tip must be able to withstand high temperatures and pressures

• Examples of cutting tools include drills, saws, and milling cutters

Tensile testing is a method to determine the strength and ductility of materials under tension.

• A sample is prepared with a specific shape and size according to the standard.

• The sample is then placed in a tensile testing machine and subjected to a gradually increasing load.

• The load is applied until the sample fractures or breaks.

• The load and elongation are recorded throughout the test.

• The stress and strain are calculated from the load and elongation data.

• The stress-strain curv...read more

Steels are alloys of iron and carbon with varying composition. Different types of steels are used for different purposes.

• Carbon steel - contains carbon as the main alloying element

• Stainless steel - contains chromium and nickel for corrosion resistance

• Tool steel - contains tungsten, molybdenum, and cobalt for high hardness and wear resistance

• Alloy steel - contains other elements like manganese, silicon, and copper for specific properties

• High-speed steel - contains tungsten, mo...read more

Forming is a process of shaping metal by plastic deformation, while forging is a process of shaping metal by applying compressive forces.

• Forming involves bending, stretching, and drawing metal into various shapes.

• Forging involves heating metal and then applying compressive forces to shape it.

• Forming is generally used for low-stress applications, while forging is used for high-stress applications.

• Examples of forming include roll forming, stamping, and extrusion, while examples...read more