Hardware FYI

Topic	Replies	Views	Activity
A disk with the hole in the middle is heated. Does the hole get bigger, smaller, or stay the same size? Heat Transfer apple	2	2676	March 27, 2022
Top Electrical Engineering Interview Questions Electrical Engineering	3	1277	July 12, 2023
Describe how you approach material selection/design for a component where strength is critical, and how you would approach a different component where stiffness is critical? Mechanical Design apple , spacex	2	2537	May 28, 2022
A floating helium balloon is in the backseat of a car. If the car accelerates forward, which direction does the balloon float and why? Free Body Diagrams tesla	1	3104	August 4, 2020
Your friend is coming over soon and you made them coffee. You want this coffee to be as hot as possible by the time they get to you. You can use creamer to affect the coffee, what should you do to make the coffee as hot as possible when they arrive? Heat Transfer synapse , heat-transfer	3	2152	December 2, 2021
What are design for manufacturability (DFM) considerations you would assess while designing an injection molded part? Manufacturing & Consumer Product Design manufacturing	1	1687	August 8, 2020
How do the strength-to-weight ratio of aluminum vs. steel compare? Materials Science materials , tesla	1	2997	August 7, 2020
How can you reduce moisture absorption in nylon? Materials Science tesla , materials	1	2948	September 28, 2020
Can you describe the two-shot injection molding process? Manufacturing & Consumer Product Design apple	2	2277	May 3, 2022
If you had designed this rear cover, what are 5 tests that you would conduct on the completed iPod Touch assembly to ensure that your rear cover design met all applicable requirements? Why? Reliability & Mechanical Test apple	2	2219	February 15, 2022
What's the optimal size rock to throw if you want to throw it as far as possible? Free Body Diagrams apple	1	2682	February 10, 2021
How do you test for waterproofing on consumer electronic products (smart phone, tablet, etc)? Mechanical Design apple	3	1702	August 28, 2023
Given an adjustable crescent wrench, which cross-sections would you use for different parts of the wrench? Mechanical Design mechanical-design , apple	2	1947	July 31, 2021
Basics of Compression Molding Consumer Hardware Guide plastics	1	2263	September 6, 2020
What DFMA considerations would you have when switching the material of a machined component from aluminum to steel? Manufacturing & Consumer Product Design	2	1830	March 8, 2022
What are the different types of stress & force a material can endure? Mechanical Design	1	2239	August 3, 2021
What are the equations of motion for a mass-spring damper system? Free Body Diagrams zoox , amazon	1	2228	October 4, 2020
What are the key components in a consumer electronic laptop? Mechanical Design general , apple	2	1793	October 3, 2020
What's the difference between thermoset plastics and thermoplastics? Materials Science tesla , apple , materials	1	2037	April 25, 2022
The buckle on your backpack is breaking. How would you redesign the part to ensure this doesn't happen? Mechanical Design synapse	1	2032	August 10, 2020
What's the difference between a true stress-strain curve and a traditional stress-strain curve? Materials Science waymo , materials	1	1969	August 5, 2020
Two cylindrical tanks are full of water, where one is oriented horizontally and another vertically. If a hole is drilled in the bottom of the tank, which one empties first? General ME Questions general	1	1107	September 24, 2023
You have a long slender vertical member with a compressive force on one end, what if the dominant failure mode? Mechanical Design	2	1599	February 15, 2022
For a simply supported beam, which beam would have less deflection: a single stacked or double stacked beam? Cantilever Beams	3	1381	January 30, 2023
Basics of Injection Molding Consumer Hardware Guide plastics	1	1932	September 3, 2020
A garden hose has stopped flow. There is constant static pressure and no water hammer. Why does the hose tear in the axial direction at the end of the hose? Mechanical Design spinlaunch , spacex	2	1570	April 24, 2022
Describe a CPU heat sink geometry and why it has that geometry. What would you do to improve or decrease the heat transfer of a heat sink? Heat Transfer	1	1908	March 3, 2022
Types of Thermal Cooling for Consumer Electronics Consumer Hardware Guide heat-transfer	2	1490	October 4, 2020
Why is a manhole cover round? General ME Questions microsoft	1	1823	March 22, 2022
You have a concentrated load at the center of a beam with two point supports on either end. Describe the shear force and bending moment diagram Cantilever Beams general , zoox	2	1464	March 3, 2024
What are the key parameters to consider when selecting a fan for forced airflow? Mechanical Design heat-transfer	2	1428	February 17, 2022
If I have sealed tubing subjected to its maximum pressure rating, where would it fail and why? Mechanical Design spacex	1	1747	October 3, 2020
When should you counterbore vs. countersink a hole? Manufacturing & Consumer Product Design	1	1708	July 31, 2021
You're designing a product rated to last for 5 years. How would you validate the design in terms of testing for performance, durability, and reliability? Reliability & Mechanical Test mechanical-testing , zoox , apple , google	1	1684	February 21, 2022
If you have an enclosed room and I open the refrigerator, how will room temperature change? Heat Transfer thermodynamics , htc	1	1663	August 4, 2020
You have two identical bolts and nuts torqued to the same spec clamping two faces together. One bolt is lubricated while the other is not. What is the clamp load of each bolt? Mechanical Design general , tesla	2	1357	February 14, 2024
Basics of Blow Molding Consumer Hardware Guide plastics	1	1621	September 6, 2020
Can you draw the block diagram for an inverting operational amplifier and derive the gain equation? Electrical Engineering apple	2	1323	April 4, 2022
What are common grades of stainless steel used in manufacturing? Materials Science general , waymo	1	1585	July 27, 2020
Name all the ways of actuating an object you can think of. What are the pros and cons of each? Mechanical Design	2	1285	February 15, 2022
Is a laminar or turbulent boundary layer better for heat transfer from the surface to the environment? Heat Transfer waymo , heat-transfer	1	1567	August 5, 2020
Testing 101: Reliability, Design Validation, Component-Level Testing, & Factory Testing Consumer Hardware Guide	2	1280	August 13, 2020
Basics of Plastic Extrusion Consumer Hardware Guide plastics	1	1537	September 3, 2020
If there is a diving board, how would you half the deflection? Cantilever Beams	1	1532	July 31, 2021
If you have a cantilevered beam with one end fixed to a wall and the other end free, and there is a moment acting on the free end, where will the beam fail? Cantilever Beams	1	1501	July 31, 2021
What are some important characteristics for material selection? Materials Science materials , apple	1	1502	August 5, 2020
If you had to pressurize a pressure vessel in testing, would you rather pressurize with liquid or gas and why? Mechanical Design spacex , firefly	1	1485	January 21, 2024
A beam is made from two cylinders, where the inner cylinder is steel and the outer cylinder is aluminum. Which cylinder will yield first if beam is a simply supported cantilever beam? Cantilever Beams general	1	832	April 2, 2024
Basics of Thermoforming Consumer Hardware Guide plastics	1	1439	September 6, 2020
Walk me through the different materials used on the visible exterior of your phone, why those specific materials might be used, and how they are manufactured Mechanical Design apple , manufacturing , general , htc	1	1432	January 25, 2024