10+ Larsen & Toubro Limited Design Engineer Interview Questions and Answers

Sheet metal thickness is decided based on factors like material type, part geometry, function, and cost.

• Consider material type and its properties (e.g. strength, ductility)

• Analyze part geometry and required structural integrity

• Evaluate function of the part and potential stresses it will endure

• Factor in cost implications of different thickness options

• Consult industry standards and guidelines for recommended thickness ranges

LMC & MMC refer to the conditions in which a part has the least or maximum amount of material respectively.

• LMC is the condition where a part has the least amount of material, ensuring the smallest size of the feature.

• MMC is the condition where a part has the maximum amount of material, ensuring the largest size of the feature.

• These conditions are important in engineering design to ensure proper fit and function of parts.

• For example, in a hole and shaft assembly, LMC for the h...read more

Beads and darts are decided based on design requirements, manufacturing constraints, and structural considerations in BIW members.

• Consider design requirements such as stiffness, strength, and crashworthiness.

• Take into account manufacturing constraints like tooling limitations and cost.

• Evaluate structural considerations such as load distribution and stress concentrations.

• Use simulation software to optimize bead and dart placement for desired performance.

• Consult with manufactur...read more

Discussion on soil mechanics starting from modulus of elasticity to liquifaction

• Modulus of elasticity is a measure of soil stiffness

• Soil strength is important in determining its ability to withstand loads

• Liquifaction occurs when soil loses strength and behaves like a liquid

• Factors affecting soil strength include soil type, moisture content, and stress history

• Liquifaction can lead to soil failure and damage to structures built on it

Annotations, PMI & GD&T are tools used in engineering to communicate design and manufacturing requirements.

• Annotations are notes or labels added to a drawing to provide additional information.

• PMI (Product Manufacturing Information) includes dimensions, tolerances, materials, and other specifications needed for manufacturing.

• GD&T (Geometric Dimensioning and Tolerancing) is a system for defining and communicating engineering tolerances.

• GD&T uses symbols like concentricity, flat...read more

Various methods are used for making BIW (Body in White) including hydroforming, stamping, welding, and bonding.

• Hydroforming: shaping metal using fluid pressure

• Stamping: pressing metal into a desired shape

• Welding: joining metal pieces together using heat

• Bonding: using adhesives to attach metal components

GD&T stands for Geometric Dimensioning and Tolerancing. It is a system for defining and communicating engineering tolerances.

• GD&T is used to specify the allowable variations in form, size, and orientation of part features.

• It helps ensure that parts fit together properly and function as intended.

• GD&T uses symbols, such as position, concentricity, and flatness, to communicate tolerance requirements.

• It is commonly used in industries such as automotive, aerospace, and manufacturi...read more

Benchmarking is the process of comparing one's business processes and performance metrics to industry bests or best practices from other companies.

• Benchmarking helps identify areas for improvement and opportunities for innovation.

• It involves analyzing data and metrics to understand how well a company is performing compared to others in the industry.

• Master section refers to a standardized set of criteria or best practices that serve as a benchmark for comparison.

• For example, a...read more

Protection of equipment focuses on preventing damage or malfunction, while safety of equipment focuses on preventing harm to individuals.

• Protection of equipment involves measures to prevent damage or malfunction, such as using surge protectors or enclosures.

• Safety of equipment involves measures to prevent harm to individuals, such as implementing safety guards or warning signs.

• Protection is more focused on the equipment itself, while safety is more focused on the people inter...read more

Hydroforming uses fluid pressure to shape metal while forming uses mechanical force.

• Hydroforming uses fluid pressure to shape metal while forming uses mechanical force

• Hydroforming allows for complex shapes with uniform wall thickness, while forming may result in uneven thickness

• Hydroforming is more cost-effective for large production runs, while forming is better for smaller quantities

• Examples of hydroforming include automotive components like exhaust pipes, while forming is ...read more

Moment of inertia is a measure of an object's resistance to changes in its rotation.

• Moment of inertia depends on the mass of an object and how that mass is distributed around an axis of rotation.

• It is calculated using the formula I = Σmiri^2, where mi is the mass of each particle and ri is the distance of each particle from the axis of rotation.

• Objects with more mass distributed farther from the axis of rotation have a higher moment of inertia.

• Moment of inertia is commonly us...read more

Centre of gravity is the point where the entire weight of an object can be considered to act.

• Centre of gravity is the point at which an object's weight is evenly distributed in all directions.

• It is the point where the object would balance perfectly if suspended from that point.

• For a symmetrical object, the centre of gravity is at the geometric centre.

• For irregular shapes, the centre of gravity may not be at the physical centre of the object.