IIT Bombay Interview Questions and Answers

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 to overcome the increased friction.

• Higher friction can al...read more

The strain in x direction cannot be determined without additional information.

• The 3D stress block only provides information about the stress components in the x, y, and z directions.

• To determine the strain in a specific direction, additional information such as the material's elastic modulus and Poisson's ratio is needed.

• The strain can be calculated using the formula: strain = stress / (elastic modulus * (1 + Poisson's ratio))

Throat thickness of steel members as per IS Code varies based on the size of the member.

• Throat thickness is the minimum thickness of the weld at the root of the joint.

• As per IS 800:2007, the throat thickness of fillet welds should be at least 0.7 times the size of the smaller member being joined.

• For example, if the size of the smaller member is 10 mm, the throat thickness of the fillet weld should be at least 7 mm.

• For butt welds, the throat thickness should be equal to the th...read more

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 is being pulled apart, compressive stress occurs when a mat...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 further hinders the absorption of laser energy.

• Compared to o...read more

Developed a machine learning model for predicting stock prices using technical indicators

• Used Python and various libraries like Pandas, NumPy, and Scikit-learn

• Preprocessed the data by removing missing values and outliers

• Extracted technical indicators like Moving Average, Relative Strength Index, and Bollinger Bands

• Trained and tested the model using various algorithms like Linear Regression, Random Forest, and Support Vector Regression

• Achieved an accuracy of 80% on the test se...read more

TR stands for Technical Report, a document that describes the process, progress, or results of a research project.

• TRs are often used in academic and scientific research to communicate findings and share knowledge.

• They can include detailed descriptions of research methods, data analysis, and conclusions.

• TRs may also be used in industry to document product development or engineering projects.

• Examples of TRs include white papers, research papers, and technical manuals.