Eaton India Innovation Center Design Engineer Interview Questions, Process, and Tips

Tolerance stack up refers to the accumulation of variations in dimensions and tolerances of individual parts in an assembly.

• Tolerance stack up can lead to issues such as interference or gaps between parts in an assembly.

• It is important to consider both the nominal dimensions and the tolerances of each part when designing an assembly.

• An example of tolerance stack up is when the cumulative variation in the thickness of m...read more

BMD for a simply supported beam is a graphical representation of the bending moment along the length of the beam.

• BMD starts from zero at the supports and peaks at the center of the beam.

• The shape of the BMD depends on the type of load and support conditions.

• For a uniformly distributed load on a simply supported beam, the BMD will be a parabolic curve.

• The BMD can be drawn by calculating the reactions at the supports and...read more

Mohr circle diagram is a graphical representation of stress transformation in materials.

• It is used in engineering to analyze stress states and predict material failure.

• The diagram shows the relationship between normal and shear stresses on different planes within a material.

• It helps engineers determine the maximum and minimum principal stresses, as well as the orientation of the planes on which they act.

Buckling of column is a phenomenon where a slender column fails due to compressive stress exceeding its critical load.

• Buckling occurs when a column is subjected to an axial load, causing it to bend and deform laterally.

• The critical load at which buckling occurs depends on the column's material properties, length, and cross-sectional area.

• Buckling can lead to sudden and catastrophic failure of the column.

• Examples of buc...read more

GD&T symbol stands for Geometric Dimensioning and Tolerancing, used to define the nominal geometry of parts and specify allowable variations.

• GD&T symbols are used to communicate design intent and control the manufacturing process

• They include symbols for features like flatness, perpendicularity, concentricity, etc.

• GD&T helps improve quality, reduce costs, and ensure parts are manufactured correctly

• It allows for more det...read more

Stack-up is the arrangement of different layers of materials in a PCB design to meet electrical and mechanical requirements.

• Determines the overall thickness of the PCB

• Affects signal integrity and impedance control

• Influences thermal management and mechanical stability

• Critical for meeting design specifications and performance goals