Yanfeng Automotive Interiors Design Engineer Interview Questions and Answers

First round is aptitude test all type of questions asked like verbal, reasoning and Technical

Q1. Explain stress, strain curve diagram with example?
Ans. 
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 stre...read more
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Q2. What is DOF? How many degrees of freedom from any object
Ans. 
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.
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Q1. What is the relay
Ans. 
A relay is an electrically operated switch that uses an electromagnet to mechanically operate a switch.
• Relays are used to control high power circuits with low power signals

• They are commonly used in automotive, industrial, and household applications

• Relays can be classified based on their operation, such as electromechanical relays or solid-state relays
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Q2. Ohm's law and current
Ans. 
Ohm's law states that the current flowing through a conductor is directly proportional to the voltage across it, given constant resistance.
• Ohm's law equation: V = I * R (voltage = current * resistance)

• Current is the flow of electric charge through a conductor

• Higher voltage leads to higher current flow, given constant resistance

• Lower resistance leads to higher current flow, given constant voltage
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Q1. Explain various GD&T
Ans. 
Geometric Dimensioning and Tolerancing (GD&T) is a system for defining and communicating engineering tolerances.
• GD&T is used to specify the allowable variations in form, size, and orientation of features on a part.

• It uses symbols, such as concentricity, flatness, and perpendicularity, to communicate the desired tolerances.

• GD&T helps ensure that parts fit together properly and function as intended.

• Examples of GD&T symbo...read more
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Q2. Explain DFM, DFS, DFA
Ans. 
DFM, DFS, and DFA stand for Design for Manufacturing, Design for Service, and Design for Assembly, respectively.
• DFM focuses on designing products that are easy and cost-effective to manufacture.

• DFS focuses on designing products that are easy to service and maintain.

• DFA focuses on designing products that are easy to assemble.

• Consideration of DFM, DFS, and DFA principles can lead to more efficient and cost-effective prod...read more
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Tough one to attempt

Q1. Asked questions related to few mechanical engineering topics
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Q1. Plastics and their uses
Ans. 
Plastics are versatile materials used in various industries for their durability, flexibility, and cost-effectiveness.
• Plastics are commonly used in packaging materials such as bottles, containers, and bags.

• They are also used in construction for pipes, insulation, and flooring.

• In the automotive industry, plastics are used for interior components, bumpers, and body panels.

• Plastics are essential in electronics for casings...read more
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