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What are the advantages & disadvantages of different types of motors?
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2
|
1418
|
March 14, 2022
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A disk with the hole in the middle is heated. Does the hole get bigger, smaller, or stay the same size?
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2
|
1507
|
March 27, 2022
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Why is a manhole cover round?
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1
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895
|
March 22, 2022
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Why does plastic become brittle in cold temperature?
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2
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2076
|
March 10, 2022
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A steel tube and a brass rod are concentrically located. their ends are fixed on both sides using rigid plates. One of these plates is fixed to the wall, the other is free. Heat is applied to the system, explain the stresses that develop in the system
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2
|
2266
|
March 10, 2022
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What are the three different modes of heat transfer?
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1
|
4009
|
July 29, 2020
|
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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?
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1
|
3469
|
August 6, 2020
|
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At what region of a stress-strain curve does strain hardening occur? What does strain hardening do?
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1
|
3717
|
July 28, 2020
|
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What DFMA considerations would you have when switching the material of a machined component from aluminum to steel?
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2
|
1237
|
March 8, 2022
|
|
What are the three laws of thermodynamics?
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1
|
9365
|
August 2, 2020
|
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If you have an enclosed room and I open the refrigerator, how will room temperature change?
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1
|
1019
|
August 4, 2020
|
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A refrigerator is in a room and you open the door. Will the room get colder or hotter?
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2
|
2354
|
February 15, 2022
|
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How do you change the cross-section of a beam to minimize deflection?
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1
|
1005
|
March 6, 2022
|
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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?
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1
|
726
|
March 3, 2022
|
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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?
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4
|
3071
|
February 23, 2022
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A car on a hill of constant slope accelerates from rest under gravity to a point on the hill. If you want to maximize the velocity of the car at this point, where along the length of the car (e.g. downhill or uphill) would you fix an additional mass?
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1
|
2337
|
February 22, 2022
|
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Reliability testing, lifecycle testing, accelerated lifecycle testing. How do you do it?
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1
|
778
|
February 21, 2022
|
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Describe the stress-strain curve between brittle and flexible materials?
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1
|
2281
|
August 3, 2021
|
|
What are the key parameters to consider when selecting a fan for forced airflow?
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2
|
722
|
February 17, 2022
|
|
What are the major design considerations for optimizing airflow?
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|
0
|
483
|
February 16, 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?
|
|
1
|
732
|
February 16, 2022
|
|
Name all the ways of actuating an object you can think of. What are the pros and cons of each?
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2
|
728
|
February 15, 2022
|
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You have a long slender vertical member with a compressive force on one end, what if the dominant failure mode?
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|
2
|
968
|
February 15, 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?
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2
|
1151
|
February 15, 2022
|
|
Your product is within spec at one location, but out of spec in another. Why?
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|
1
|
823
|
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?
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|
3
|
1387
|
December 2, 2021
|
|
When selecting a material what would you take into consideration more, tensile strength or yield strength?
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|
3
|
1677
|
November 29, 2021
|
|
Three buckets Gasoline, Air, and Water
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|
1
|
778
|
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
|
|
1
|
830
|
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?
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1
|
770
|
August 12, 2021
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