Mechanical engineer Interview Questions | Glassdoor

Mechanical engineer Interview Questions

"When interviewing candidates for the role of mechanical engineer, employers look for candidates who are enthusiastic to create innovative designs, analyses, and methods of production for mechanical systems. Expect to answer engineering questions that will assess your knowledge of the field as well as your creative problem-solving abilities to turn a theoretical device into a real product. In addition, come ready to discuss examples of past projects or designs and how you would excel in a team-oriented setting."

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Asked how the strength to weight ratio of aluminum and steel compared.

3 Answers

strength-to-weight ratio in typically the material's strength (which is force per unit area upon failure) divided by its density. Aluminum has a tensile strength of 572 MPa and a density of 2.81 g/cm^3 which computes to . Steel, on the other hand has a tensile strength of 505 MPa and a density of 8.00 g/cm^3. So, as can be seen, aluminum has a higher strength-to-weight ratio than steel

Strength to weight ratio can be defined properly by the Yield strength (which defines the maximum stress that a material can handle before plastic deformation) to Density (mass/volume). Aluminum (6061) yield strength : density is 250MPa : 2080 kg/m^3 Stainless Steel cold rolled yield strength : density is 500MPa : 8000kg/m^3 For the same volume of material, the ratios are 1/8 for aluminum to 1/16 for stainless steel. You're getting twice as much the amount of strength on the aluminum per given volume than on the steel.

Other two answers here are kinda wrong and honestly I think they're missing the point of the question. Strength is entirely dependent on alloy. Some aluminum alloys will have a higher strength/weight than some steel alloys, and vice versa. Unless the interview specifies specific alloys, you really can't make a blanket statement about "steel vs aluminum." You can, however, make general statements about stiffness. Almost all the densities and elastic moduli of aluminum or steel are nearly constant across the alloys, and actually for straight tension they have very similar stiffness/weight. The difference comes in bending. The same weight of aluminum has a much large cross section, and therefore a much larger moment of inertia, so an aluminum beam in buckling or bending will be stiffer than steel. Hope this helps.

What has been your active role in the team process you're currently working with?

2 Answers

You will likely be asked simple technical questions (e.g. solve an equation or diagnose an issue). As an example for a mechanical engineer, "how does an easy bake oven work?" The point is to answer the question as fully as possible

1 Answer

If given four projects of equal importance with the same due date, what would you do. Be specific

253 Answers

If two vehicles are identical, except for one weighing twice as much as the other vehicle, and they roll down a hill, which car reaches the bottom first? Neglect air resistance. Assume the extra mass is in the body of the vehicle.

13 Answers

If you were in a dark closet with 49 white socks and 1 black many socks would you pick so as to ensure that you exit the closet with a pair of similar colored socks

17 Answers

If you have a refrigerator in an isolated room (no heat in or out) and left the door to the refrigerator open, what would happen to the temperature to the room? Would it go up, down or say the same?

13 Answers

in a boat on a lake with a rock, throw the rock in the water which way does the water level move? here is a memory card- what is it made out of and how was it made?

8 Answers

You're in a row boat, which is in a large tank filled with water. You have an anchor on board, which you throw overboard. Does the water level in the tank rise or fall?

6 Answers

You put a glass of water on a record turntable and begin slowly increasing the speed. What happens first - does the glass slide off, tip over, or does the water splash out.

6 Answers
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