ZF India Technology Center Senior Design Engineer Interview Questions and Answers

Q1. Design and calculations
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Q1. Experience details and salary discussion
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Find midpoint, Centroid of part in a geometry, find shear stress and bending moment. Nx part file extension name
Question about injection molding. Tool concept of injection molding. Some basic gd&t concepts.

Q1. Be confident and do the tool test to the best of your capacity
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Q2. Show your interest in the company and answer straight to the point.
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Q1. Company knowledge
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Q2. CV or resume related questions
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Q1. CNC programming knowledge
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Q2. Material & milling tool knowledge
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Q1. Previous experiences discussion
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Q2. Salary & HR formalities
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Q1. Explain Free body Diagram ?
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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
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Q2. What is the working principle of a brake system ?
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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
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Q1. What is Stack up tolerance ?
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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
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Q2. What is the difference between cylindricity and roundness in GD&T ?
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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
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Q1. Create 3d model for the given engineering drawing ?
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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
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Q2. Do drafting for the given 3d model ?
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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
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Basic questions on sheetmetals , casting and gd and T

Q1. Previous project related questions and product development, PLM, data management, dfmea, dfm and its related questions.
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Q1. General questions and Salary discussion
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