DFS, Mumbai Duty Free, Mumbai International Airport Interview Questions and Answers

I teach design of machine elements subject to diploma in mechanical engineering students by using a combination of theoretical concepts and practical applications.

• I start by introducing the basic concepts of machine design and the different types of machine elements.

• I use real-life examples to help students understand the practical applications of the subject.

• I encourage students to work on design projects to apply their knowledge and develop their skills.

• I provide hands-on t...read more

Mechanics of materials deals with behavior of materials under load while strength of materials deals with their ability to withstand stress.

• Mechanics of materials focuses on the study of deformation and stress in materials under external loads.

• Strength of materials deals with the ability of materials to withstand stress without failure.

• Mechanics of materials is concerned with the behavior of materials under various types of loading such as tension, compression, bending, and t...read more

Factor of safety differs in civil and mechanical engineering contexts

• In civil engineering, factor of safety is used to ensure the safety of structures and materials under loads and stresses

• In mechanical engineering, factor of safety is used to ensure the safety of mechanical components and systems under loads and stresses

• Civil engineering typically uses a higher factor of safety than mechanical engineering

• For example, a bridge may have a factor of safety of 2.0 in civil engin...read more

Universal strength machine is used in fitness centers and rehabilitation facilities to measure and improve muscular strength.

• Used for resistance training and rehabilitation exercises

• Measures strength in various muscle groups

• Helps in designing personalized workout plans

• Examples: leg press, chest press, lat pulldown

• Can be used by athletes, seniors, and people with disabilities

Stress strain curve for mild steel shows the relationship between stress and strain during deformation.

• Initially, stress and strain are proportional to each other in the elastic region.

• Beyond the elastic limit, plastic deformation occurs and stress increases while strain also increases.

• The point of maximum stress is the ultimate tensile strength.

• The point of fracture is the breaking stress.

• The area under the curve represents the energy absorbed by the specimen.

• Mild steel has ...read more

Universal testing machine is used to test the strength and durability of materials.

• Used in engineering and manufacturing industries

• Tests materials such as metals, plastics, ceramics, and composites

• Measures properties like tensile strength, compression strength, and elasticity

• Helps in quality control and product development

• Examples of applications include testing of car parts, construction materials, and medical implants

Design of machine elements involves fundamental concepts such as stress, strain, fatigue, and material properties.

• Machine elements are designed to withstand various types of loads and stresses.

• Stress and strain analysis is used to determine the strength and durability of machine elements.

• Fatigue analysis is used to predict the life of machine elements under cyclic loading.

• Material properties such as strength, stiffness, and toughness are important considerations in the design...read more

Factor of safety is the ratio of the maximum stress a material can withstand to the actual stress it is subjected to.

• It is a measure of how much stronger a material is than the maximum stress it will encounter.

• It is calculated by dividing the maximum stress a material can withstand by the actual stress it is subjected to.

• A factor of safety greater than 1 indicates that the material is stronger than the maximum stress it will encounter.

• For example, if a bridge is designed to w...read more