SKH Metals 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
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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. About design engineer questions
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Q2. Previous company questions
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Q3. Basic design questions
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Q4. Autocad test questions
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Q1. CAD test in catia
Ans. 
CAD test in CATIA evaluates candidate's proficiency in using CATIA software for designing engineering projects.
• Demonstrate ability to create 3D models using CATIA software

• Show proficiency in creating assemblies and performing simulations in CATIA

• Explain experience in generating 2D drawings and technical documentation in CATIA
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Q2. Plastic material, defects
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Q1. Tell me about yourself Favourite engineering subject
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Q1. Self Introduction
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Q2. Salary Expectation
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Q3. Why are reason you previous company?
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Q1. All questions related to plastic 1. what is plastic rib thickness basis on wall thickness?
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Q2. 2. what is shutt off angle in molding?
Ans. 
Shut off angle in molding refers to the angle at which the mold halves meet and close to form a complete part.
• Shut off angle is crucial for ensuring proper part ejection and preventing flash formation.

• It is typically between 0.5 to 3 degrees, depending on the material and part design.

• A larger shut off angle may be required for parts with deep cavities or complex geometries.

• Improper shut off angle can lead to part defec
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Q3. 3. Plastic shrinkage
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Q4. 4. In pp plastic material coating or painting are used?
Ans. 
In pp plastic material, coating is preferred over painting for better adhesion and durability.
• Coating is commonly used on PP plastic material for better adhesion and durability

• Painting is less preferred on PP plastic due to poor adhesion and durability

• Examples of coatings for PP plastic include polypropylene-specific primers and adhesion promoters
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Q5. 5. How to define undercut angle in plastic?
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Undercut angle in plastic is the angle between the side wall of a mold and the vertical direction.
• Undercut angle is important in plastic injection molding to ensure proper release of the part from the mold.

• It is typically measured in degrees and affects the draft angle required for the mold.

• A larger undercut angle allows for easier part ejection but may require more complex mold design.

• Examples of parts with undercut a...read more
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Q6. 6. what is warpage & sink marks in plastic & how to prevent?
Ans. 
Warpage and sink marks are common defects in plastic parts caused by uneven cooling. Prevention methods include proper gate design, cooling system optimization, and material selection.
• Warpage is the deformation of a plastic part due to uneven cooling, leading to dimensional inaccuracies.

• Sink marks are depressions on the surface of a plastic part caused by uneven cooling and shrinkage.

• Prevention methods include proper g...read more
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Q1. Part drawing 2D or 3D
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2D is a flat picture while 3D is one that has depth.
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Q2. Sketcher 2d drawings
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First of all we sketch 2d drawings after we assembly the complete object
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Q3. Assembly all part drawing
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When 2D sketch complete, after we calling parts to make complete assembly.
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Q4. Generative Sheet metal
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Q5. Generative drafting
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Reasoning and aptitude test

Q1. About drawing and gd&t
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Q2. Software knowledge
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Q1. Tell me about yourself
Ans. 
I am a design engineer with a passion for creating innovative solutions.
• Experienced in using CAD software such as AutoCAD and SolidWorks

• Proficient in designing mechanical components and systems

• Strong problem-solving and analytical skills

• Collaborative team player with excellent communication skills

• Successfully completed projects like designing a new product for a client and improving manufacturing processes
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Q2. What are the top 5 features of CATIA?
Ans. 
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
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Q3. What is component drawing vs assembly drawing
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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 mainte...read more
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