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	2656	March 27, 2022
Top Electrical Engineering Interview Questions Electrical Engineering	3	1235	July 12, 2023
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	3082	August 4, 2020
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	2506	May 28, 2022
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	2134	December 2, 2021
How do the strength-to-weight ratio of aluminum vs. steel compare? Materials Science materials , tesla	1	2978	August 7, 2020
What are design for manufacturability (DFM) considerations you would assess while designing an injection molded part? Manufacturing & Consumer Product Design manufacturing	1	1671	August 8, 2020
How can you reduce moisture absorption in nylon? Materials Science tesla , materials	1	2931	September 28, 2020
Can you describe the two-shot injection molding process? Manufacturing & Consumer Product Design apple	2	2261	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	2202	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	2665	February 10, 2021
How do you test for waterproofing on consumer electronic products (smart phone, tablet, etc)? Mechanical Design apple	3	1687	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	1939	July 31, 2021
Basics of Compression Molding Consumer Hardware Guide plastics	1	2240	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	1820	March 8, 2022
What are the equations of motion for a mass-spring damper system? Free Body Diagrams zoox , amazon	1	2211	October 4, 2020
What are the key components in a consumer electronic laptop? Mechanical Design general , apple	2	1774	October 3, 2020
What are the different types of stress & force a material can endure? Mechanical Design	1	2162	August 3, 2021
The buckle on your backpack is breaking. How would you redesign the part to ensure this doesn't happen? Mechanical Design synapse	1	2019	August 10, 2020
What's the difference between thermoset plastics and thermoplastics? Materials Science tesla , apple , materials	1	2009	April 25, 2022
What's the difference between a true stress-strain curve and a traditional stress-strain curve? Materials Science waymo , materials	1	1948	August 5, 2020
You have a long slender vertical member with a compressive force on one end, what if the dominant failure mode? Mechanical Design	2	1576	February 15, 2022
For a simply supported beam, which beam would have less deflection: a single stacked or double stacked beam? Cantilever Beams	3	1362	January 30, 2023
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	1081	September 24, 2023
Basics of Injection Molding Consumer Hardware Guide plastics	1	1914	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	1548	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	1890	March 3, 2022
Why is a manhole cover round? General ME Questions microsoft	1	1806	March 22, 2022
Types of Thermal Cooling for Consumer Electronics Consumer Hardware Guide heat-transfer	2	1470	October 4, 2020
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	1431	March 3, 2024
What are the key parameters to consider when selecting a fan for forced airflow? Mechanical Design heat-transfer	2	1412	February 17, 2022
If I have sealed tubing subjected to its maximum pressure rating, where would it fail and why? Mechanical Design spacex	1	1724	October 3, 2020
When should you counterbore vs. countersink a hole? Manufacturing & Consumer Product Design	1	1688	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	1666	February 21, 2022
If you have an enclosed room and I open the refrigerator, how will room temperature change? Heat Transfer thermodynamics , htc	1	1644	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	1326	February 14, 2024
Basics of Blow Molding Consumer Hardware Guide plastics	1	1605	September 6, 2020
Can you draw the block diagram for an inverting operational amplifier and derive the gain equation? Electrical Engineering apple	2	1305	April 4, 2022
What are common grades of stainless steel used in manufacturing? Materials Science general , waymo	1	1565	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	1277	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	1556	August 5, 2020
Testing 101: Reliability, Design Validation, Component-Level Testing, & Factory Testing Consumer Hardware Guide	2	1261	August 13, 2020
If there is a diving board, how would you half the deflection? Cantilever Beams	1	1516	July 31, 2021
Basics of Plastic Extrusion Consumer Hardware Guide plastics	1	1513	September 3, 2020
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	1492	July 31, 2021
What are some important characteristics for material selection? Materials Science materials , apple	1	1485	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	1459	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	804	April 2, 2024
Basics of Thermoforming Consumer Hardware Guide plastics	1	1420	September 6, 2020
How would you design a snap fit? Where are snap fits used most often? How much force does it usually take to insert a snap fit? Mechanical Design	1	1415	February 16, 2022