GGS Engineering Services Senior Design Engineer Interview Questions and Answers

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 improve the quality of engineering drawings by providing a clear and concise way to communicate design requirements.

• GD&T is essential for ensuring parts fit together properly and function as ...read more

Circularity refers to the overall roundness of a feature, while runout refers to the amount of wobble or variation in a feature's position relative to a reference axis.

• Circularity is a 2D tolerance that controls the overall roundness of a feature, ensuring it is within a specified circular boundary.

• Runout is a 3D tolerance that measures the amount of wobble or variation in a feature's position relative to a reference a...read more

Design an L bracket with 2 mounting holes.

• Start by determining the dimensions of the L bracket (length, width, thickness)

• Decide on the placement of the 2 mounting holes (size, distance from edges)

• Consider the material for the bracket (steel, aluminum, etc.)

• Ensure the bracket is sturdy and can support the intended load

• Create a detailed CAD drawing of the L bracket design

Material selection is crucial for design engineering. Currently using aluminum for its lightweight and corrosion resistance.

• Consider mechanical properties like strength, stiffness, and ductility when selecting materials

• Think about environmental factors such as temperature, moisture, and chemicals

• Aluminum is commonly used for its lightweight nature, corrosion resistance, and ease of machining

DFMEA stands for Design Failure Mode and Effects Analysis, a systematic approach to identifying and preventing potential failures in a product design.

• Identify potential failure modes in the design

• Determine the effects of each failure mode on the system

• Assign a severity ranking to each failure mode

• Identify potential causes of each failure mode

• Assign a probability ranking to each cause

• Determine the ability to detect each...read more

There are 14 symbols in GD&T.

• There are 14 geometric symbols in GD&T, each representing a specific control on a part's dimensions and tolerances.

• Some common symbols include position, concentricity, perpendicularity, and parallelism.

• GD&T symbols are used to communicate engineering tolerances and requirements on technical drawings.

• Understanding and correctly interpreting GD&T symbols is crucial for ensuring the proper man...read more

The decision between sheetmetal bracket or casting is based on factors like complexity, strength, cost, and production volume.

• Consider the complexity of the part - sheetmetal brackets are generally simpler to design and manufacture compared to castings.

• Evaluate the required strength and load-bearing capacity - castings are often preferred for heavy-duty applications due to their superior strength.

• Assess the cost implic...read more

Modelling and detailing of large sheet metal involves creating 3D models and producing detailed drawings for manufacturing.

• Use CAD software to create accurate 3D models of sheet metal components

• Consider material thickness, bend radii, and tolerances in the design

• Apply appropriate sheet metal forming techniques such as bending, punching, and welding

• Generate detailed drawings with dimensions, tolerances, and annotations ...read more