20+ Interview Questions and Answers

Snap fits are used in plastics to join two parts together without the need for additional fasteners.

• Cantilever snap fit

• Annular snap fit

• Torsion snap fit

• Snap hinge

• Snap bead

• Snap tab

• Snap lock

• Snap latch

• Snap hook

CATIA is a CAD software with various features. Here are the top 5:

• Advanced surface modeling

• Assembly design and management

• Kinematics simulation

• Sheet metal design

• Generative shape design

Component drawing shows individual parts with dimensions and specifications, while assembly drawing shows how parts fit together to form a complete product.

• Component drawing focuses on individual parts and their specifications

• Assembly drawing shows how parts fit together to form a complete product

• Component drawing is used for manufacturing and quality control

• Assembly drawing is used for assembly instructions and maintenance

• Examples: Component drawing of a screw, Assembly draw...read more

DOF stands for Degrees of Freedom. It refers to the number of independent parameters that define the configuration of an object.

• DOF is the number of ways a rigid body can move in 3D space.

• For a rigid body in 3D space, there are 6 degrees of freedom - 3 translational and 3 rotational.

• Examples of DOF include linear motion along x, y, z axes and rotational motion around x, y, z axes.

Remastering in plastics is the process of improving the quality of recycled plastic materials.

• It involves adding new additives to the recycled plastic to enhance its properties.

• The process can also involve removing impurities and contaminants from the recycled plastic.

• Remastering helps to increase the value and usability of recycled plastic materials.

• Examples of remastered plastics include PET bottles, HDPE containers, and PVC pipes.

Stress-strain curve shows relationship between stress and strain in a material under tension.

• Stress-strain curve is a graphical representation of how a material deforms under stress.

• It typically consists of a linear elastic region, a yield point, plastic deformation, and ultimate failure.

• Example: Steel has a high yield strength, so its stress-strain curve shows a steep initial slope.

• Example: Rubber has a low yield strength, so its stress-strain curve shows a more gradual slop...read more

Stay neutral and provide factual information without expressing personal opinions.

• Remain calm and composed

• Avoid expressing personal opinions

• Stick to factual information

• Provide multiple perspectives if applicable

• Encourage further research and discussion

Plastic defect is a flaw or imperfection in a plastic material that affects its quality and performance.

• Plastic defects can include air bubbles, warping, sink marks, flow lines, and voids.

• Air bubbles are trapped pockets of air within the plastic material.

• Warping is the deformation or twisting of the plastic material.

• Sink marks are depressions on the surface caused by uneven cooling.

• Flow lines are visible lines or streaks on the surface due to uneven flow of plastic during mol...read more

NVH stands for Noise, Vibration, and Harshness. Single line exhaust and dual line exhaust refer to the number of exhaust pipes in a vehicle.

• NVH refers to the level of noise, vibration, and harshness in a vehicle

• Single line exhaust has one exhaust pipe while dual line exhaust has two

• Dual line exhaust can improve engine performance and sound

• NVH is an important factor in vehicle design and can affect customer satisfaction

Quality is meeting or exceeding customer expectations. 7QC tools, 8D, 7 safety fundamentals, 7 golden rules, and 5S are quality improvement methodologies.

• 7QC tools are a set of problem-solving tools used to improve quality. Examples include Pareto charts, fishbone diagrams, and control charts.

• 8D is a problem-solving methodology used to identify, correct, and prevent problems. It involves eight steps, including defining the problem, implementing a temporary fix, and verifying ...read more

Excel costing process involves calculating net RM cost, conversion cost, and overheads.

• Net RM cost calculation involves determining the cost of raw materials used in production.

• Conversion cost calculation involves determining the cost of converting raw materials into finished products.

• Overhead costs include indirect expenses such as rent, utilities, and salaries.

• Excel can be used to create formulas and templates to automate the costing process.

• Costing analysis can help identi...read more

Sheet metal operations involve cutting, bending, and shaping metal sheets to create various products.

• Sheet metal cutting can be done through various methods such as laser cutting, plasma cutting, and waterjet cutting.

• Bending is done using press brakes or rollers to create angles and curves in the metal.

• Shaping involves techniques such as deep drawing, spinning, and punching to create complex shapes and designs.

• Sheet metal operations are commonly used in industries such as aut...read more

Motors convert electrical energy into mechanical energy, while generators convert mechanical energy into electrical energy.

• Motors use electricity to produce motion, while generators use motion to produce electricity

• Motors have a rotor that spins within a stator, while generators have a rotor that is turned by an external force

• Examples of motors include electric fans and washing machines, while examples of generators include hydroelectric dams and wind turbines

A diode is an electronic component that allows current to flow in only one direction. Current is the flow of electric charge.

• Diodes are commonly used in rectifiers to convert AC to DC

• They are also used in voltage regulators and signal demodulators

• Current is measured in amperes (A) and is the rate of flow of electric charge

• It can be either direct current (DC) or alternating current (AC)

Strength of materials is the study of how materials behave under different forces and loads.

• Strength of materials involves analyzing the stress and strain of materials.

• It helps in designing structures that can withstand different forces and loads.

• Examples include calculating the load-bearing capacity of a bridge or determining the strength of a material used in manufacturing.

• It is important in fields like civil engineering, mechanical engineering, and material science.

• Underst...read more

Zero-based costing is a method of cost accounting that involves starting from scratch and justifying every expense.

• Involves analyzing and justifying every expense from scratch

• Helps identify unnecessary costs and prioritize spending

• Used in industries such as manufacturing, healthcare, and retail

• Example: Analyzing the cost of materials, labor, and overhead for a stamped part

• Can lead to more accurate cost estimates and better decision-making

The least count of vernier is the smallest measurement that can be read on the scale.

• It is determined by the number of divisions on the vernier scale and the main scale.

• It is calculated by dividing the smallest division on the main scale by the number of divisions on the vernier scale.

• For example, if the smallest division on the main scale is 1 mm and there are 10 divisions on the vernier scale, the least count would be 0.1 mm.

Advanced manufacturing techniques are used extensively in the automotive sector to improve efficiency and quality.

• Advanced robotics and automation are used in assembly lines to increase production speed and reduce errors.

• 3D printing is used to create prototypes and custom parts.

• Virtual reality is used for design and simulation.

• Artificial intelligence is used for predictive maintenance and quality control.

• Examples include Tesla's Gigafactory, which uses advanced automation and...read more

Black Box Testing is a software testing method where the internal structure/design of the application is not known to the tester.

• Tester focuses on the functionality of the software without knowing its internal code

• Tests are based on requirements and specifications

• Input data is provided and output is verified without knowing how the software processes the data

Integration testing is a type of testing where individual units are combined and tested as a group to ensure they work together correctly.

• Integration testing focuses on testing the interactions between different components/modules of a system.

• It helps in identifying issues related to communication between different units.

• Examples include testing the integration of a login module with a database or testing the integration of a payment gateway with an e-commerce website.

Beta testing is the final phase of testing before a software product is released to the public, where real users test the product in a real-world environment.

• Beta testing helps identify bugs, usability issues, and gather feedback from real users.

• Beta testers are usually external users who volunteer to test the product before its official release.

• Beta testing can be open to the public or limited to a select group of testers.

• Examples of beta testing include Google's beta progra...read more

Product validation involves several steps to ensure that the product meets the desired requirements and specifications.

• Define the product requirements and specifications

• Develop a prototype or minimum viable product (MVP)

• Test the prototype/MVP to identify any issues or areas for improvement

• Refine the product based on feedback and testing results

• Repeat testing and refinement until the product meets all requirements and specifications

• Obtain feedback from potential customers or u...read more

Catalyst welding is a process of welding catalysts onto metal surfaces to improve their performance.

• Catalyst welding is used in industries such as automotive, chemical, and petroleum.

• It involves welding a catalyst onto a metal surface to improve its catalytic activity.

• The process requires specialized equipment and trained professionals.

• Examples of catalysts that can be welded include platinum, palladium, and rhodium.

• Catalyst welding is important for reducing emissions and imp...read more

SDLC is the process of developing software, while STLC is the process of testing software.

• SDLC focuses on the development of software from planning to deployment.

• STLC focuses on the testing activities like test planning, test design, test execution, and test closure.

• SDLC includes phases like requirements gathering, design, coding, testing, and deployment.

• STLC includes phases like test planning, test design, test execution, and test closure.

• SDLC is more about the development t...read more