Latest Mechanical Engineering topics

Topic	Replies	Views	Activity
You put a glass of water on a record turntable and begin slowly increasing the speed. What happens first? Does the glass slide off or tip over, or does the water splash out? Free Body Diagrams apple , general , physics	1	6393	August 6, 2020
At what region of a stress-strain curve does strain hardening occur? What does strain hardening do? Materials Science general , cisco	1	6229	July 28, 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
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
A refrigerator is in a room and you open the door. Will the room get colder or hotter? Heat Transfer	2	5030	February 15, 2022
How do you change the cross-section of a beam to minimize deflection? Cantilever Beams apple , tesla , facebook , spacex	1	2151	March 6, 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	1887	March 3, 2022
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
Describe the stress-strain curve between brittle and flexible materials? Materials Science apple , tesla	1	6341	August 3, 2021
What are the key parameters to consider when selecting a fan for forced airflow? Mechanical Design heat-transfer	2	1410	February 17, 2022
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	1414	February 16, 2022
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
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
Your product is within spec at one location, but out of spec in another. Why? Manufacturing & Consumer Product Design	1	1287	January 13, 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	2133	December 2, 2021
When selecting a material what would you take into consideration more, tensile strength or yield strength? Materials Science	3	2373	November 29, 2021
There are three buckets with water, air, and gasoline. If you put a sensor in the buckets, what type of sensing technology would you use to tell them apart? Mechanical Design	1	1236	November 29, 2021
Name all the ways to to lighten a cantilevered I beam with a point load on the end, while minimizing weight and deflection Cantilever Beams	1	1186	August 12, 2021
For the following joints (images) describe the forces and failure modes of the bolted connections. Why is pretensioning the bolts important? What would fatigue failure look like for the bolted connections? Mechanical Design	1	1281	August 12, 2021
Can you apply MMC to a profile of surface call out in GD&T? Manufacturing & Consumer Product Design	1	1277	August 12, 2021
You have two objects that mate together, you want to decrease the total linear tolerance stack up. What can you do to decrease the total tolerance stackup? Manufacturing & Consumer Product Design	1	1244	August 12, 2021
You have a bench (image), where would you sit to maximize the reaction force on one end? Cantilever Beams	2	1139	August 12, 2021
The buckle on your backpack is breaking. How would you redesign the part to ensure this doesn't happen? Mechanical Design synapse	1	2018	August 10, 2020
If you're on a spaceship and want to throw out garbage outside such that it will propel you outwards, which direction do you throw the garbage? Free Body Diagrams firefly	1	964	July 31, 2021
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
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
Garden hose has stopped flow. There is constant static pressure and no water hammer. Why does hose have tear in axial direction at the end of the hose? Mechanical Design spinlaunch	1	907	May 6, 2021
You have a stool with four legs identical in size. Two legs are made from aluminum, while the other legs are made from steel. If a load is placed on the stool's seat, will the legs take equal load or not? Mechanical Design spacex	7	6057	April 17, 2021
How do you calculate the correct sample size for reliability testing? Manufacturing & Consumer Product Design amazon , apple , waymo , google	3	9884	April 15, 2021
Given a point-load at the end of a wall-mounted cantilever beam, what is the shear stress at the wall? Cantilever Beams amazon	4	2893	April 5, 2021