HDFC Bank Interview Questions and Answers

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 or scratching (e.g. Rockwell hardness)

• Ductility: Ability ...read more

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 alter its properties, such as increasing its strength or ...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

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 shows permanent deformation without an increase in stress....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 density and high conductivity), and PVC (low cost and chemical r...read more