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Design Engineer Interview Questions

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What are the different ways you can you tell if this part is steel or aluminium.

4 Answers

Simply by using a magnet, Steel has metallic properties, and the magnet will connect. Aluminium will do nothing.

Many stainless steel alloys are not magnetic, so if your magnet is attracted to the material you will definitely know it is steel, but if it doesn't you will not know what the material is.

Simple methods would be density (feeling the mass of the object), surface finish (color, texture). If coated that may give you the answer i.ie anodized would indicate aluminium. For more information I would go for EDX( Energy-dispersive X-ray spectroscopy) and possible a cross section to look at the grain structure.

If you have a cantilevered beam with a load at the unsupported end, what can you change about the beam to mitigate the effect of the load.

4 Answers

What are 5 different variables of a coil spring you can change to affect spring force?

3 Answers

Given a string find the first non-repeated character.

12 Answers

Basic MOSFET, CMOS questions were asked.

11 Answers

design a full adder with 2-1 mux

7 Answers

design a combinational circuit which counts the number of 1s in a 7-bit input .

7 Answers

Create a 8 input AND gate using 3 4:1 muxes

7 Answers

CMOS Inverter , how to reduce the drive strength of Minimum size inverter

8 Answers

You have 5kg of Aluminum and 5kg of Steel. You can make whatever cross section beam you want with these materials. If you have to make a cantilever beam 1m long with a load at the end. And you want to minimize the deflection. What material would you use?

6 Answers
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