Aptiv Senior Design Engineer Interview Questions and Answers

Factors affecting NVH include vehicle design, materials used, engine type, and road conditions.

• Vehicle design: Shape, size, weight distribution

• Materials used: Quality of materials, insulation

• Engine type: Number of cylinders, power output

• Road conditions: Smoothness, tire type

Addressing NVH in gearboxes involves optimizing design, material, manufacturing, and operational factors.

• Optimizing gear geometry like tooth profile and helix angle can reduce noise.

• Proper material quality and heat treatment can minimize vibrations.

• Precision machining and assembly quality are crucial for reducing NVH.

• Consider load conditions, lubrication, and operational speed for NVH control.

• Environmental factors like...read more

Yes, a CAD test for connector in Solidworks or CATIA can be conducted.

• Create a 3D model of the connector using Solidworks or CATIA

• Ensure the model meets the required specifications and tolerances

• Test the model for functionality and durability

• Make necessary modifications based on test results

• Repeat the testing process until the model meets all requirements

Design using nx

• NX is a powerful CAD software used for designing

• It offers a wide range of tools and features for creating complex designs

• Examples of designs that can be created using NX include automotive parts, machinery, and consumer products

Free body diagram is a visual representation of all the forces acting on an object in a given situation.

• It shows all the forces acting on an object as vectors, with arrows indicating the direction and magnitude of each force.

• The object of interest is represented as a point or a simple shape, with all external forces acting on it shown around it.

• Internal forces within the object are not shown on a free body diagram.

• Free...read more

A brake system works by converting kinetic energy into heat energy through friction to slow down or stop a vehicle.

• Brake pedal is pressed by the driver

• Brake fluid is compressed in the master cylinder

• Pressure is transmitted through brake lines to the brake calipers or wheel cylinders

• Brake pads or shoes press against the brake rotor or drum to create friction and slow down the vehicle

Stack up tolerance refers to the accumulation of tolerances in a series of components or parts that are assembled together.

• Stack up tolerance is important in ensuring that all components fit together properly in an assembly.

• It involves considering the individual tolerances of each component and how they may add up or cancel out when assembled.

• For example, if a shaft has a tolerance of +/- 0.1mm and a hole has a toleran...read more

Cylindricity refers to the overall 3D form of a cylinder, while roundness refers to the deviation of a circle from a perfect circle.

• Cylindricity is a 3D tolerance that controls the overall form of a cylinder, ensuring that all points on the surface lie within a specified tolerance zone.

• Roundness is a 2D tolerance that controls the deviation of a circle from a perfect circle, ensuring that the entire circle lies within ...read more

To create a 3D model from an engineering drawing, use CAD software to accurately replicate the dimensions and features.

• Use CAD software such as AutoCAD, SolidWorks, or Fusion 360 to create the 3D model.

• Refer to the engineering drawing for dimensions, angles, and features to accurately replicate in the 3D model.

• Utilize tools within the CAD software to create extrusions, cuts, fillets, and other features as needed.

• Check ...read more

Yes, I can create detailed 2D drawings based on the 3D model provided.

• Create orthographic views (top, front, side) of the 3D model

• Include dimensions, annotations, and tolerances in the drawings

• Generate section views to show internal features

• Add surface finish symbols and notes as needed