Advance Valves Global Interview Questions and Answers

The stress-strain diagram of steel shows the relationship between stress (force applied) and strain (resulting deformation).

• The diagram typically consists of a linear elastic region, a yield point, a plastic region, and a fracture point.

• In the linear elastic region, stress and strain are directly proportional according to Hooke's Law.

• The yield point is where the material begins to deform plastically.

• The plastic region ...read more

Mechanical properties of materials include strength, stiffness, toughness, hardness, ductility, and elasticity.

• Strength: Ability to withstand applied force without failure (e.g. tensile strength, compressive strength)

• Stiffness: Resistance to deformation under load (e.g. Young's modulus)

• Toughness: Ability to absorb energy and deform plastically before fracturing (e.g. impact toughness)

• Hardness: Resistance to indentation...read more

The second law of thermodynamics states that the total entropy of an isolated system can never decrease over time.

• Entropy in a closed system tends to increase over time

• Heat naturally flows from hot to cold objects

• Efficiency of energy conversion processes is limited by the second law of thermodynamics

Shell thickness calculation involves considering factors like material properties, pressure, and temperature.

• Shell thickness calculation involves determining the minimum thickness required to withstand the pressure and temperature of the fluid inside the shell.

• Factors to consider include material properties, pressure, temperature, and corrosion allowance.

• Heat treatment process involves heating and cooling a material to...read more

Properties of material refer to its physical and chemical characteristics.

• Physical properties include density, melting point, boiling point, and conductivity.

• Chemical properties include reactivity, flammability, and toxicity.

• Materials can also have mechanical properties such as strength, toughness, and elasticity.

• Examples of materials and their properties include steel (high strength and hardness), aluminum (low densit...read more