IIT Bombay PHD Research Scholar Interview Questions and Answers

Stress in engineering refers to the internal force experienced by a material or structure due to external loads.

• Stress is a measure of the intensity of the internal forces within a material or structure.

• It is caused by external loads or forces acting on the material or structure.

• Stress can be categorized into different types such as tensile, compressive, shear, and bending stress.

• Tensile stress occurs when a material i...read more

Aluminium is less suitable for laser cutting due to its high reflectivity and thermal conductivity.

• Aluminium has a high reflectivity, which means it reflects a significant amount of laser energy instead of absorbing it.

• Its high thermal conductivity causes the heat generated during laser cutting to quickly dissipate, making it difficult to achieve precise cuts.

• Aluminium also forms an oxide layer on its surface, which fu...read more

Increasing coefficient of friction in rolling process will result in increased resistance and reduced efficiency.

• Increased coefficient of friction leads to increased resistance between the rolling object and the surface it is rolling on.

• This increased resistance results in more energy being lost as heat and less energy being transferred to useful work.

• The rolling process becomes less efficient as more force is required...read more