Does extracurricular stuff matter?

Does extracurricular stuff matter?

In college right now for mechanical engineering, I got a internship this summer and should have a more advanced internship next summer too. My GPA is decent, expecting to finish with at least like a 3.3 or higher unless I have a total meltdown. So how much should I worry about doing stuff like join National Society of Professional Engineers or do a work study program or help out being a lab assistant etc… Im pretty busy so the only extracurricular thing Im too worried about right now is pounding some brews and playing intramural kickball lol

Submitted June 26, 2017 at 04:44PM by dboss77
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Does extracurricular stuff matter?

CMU Pier Reinforcement Question

CMU Pier Reinforcement Question

I have two piers in question. They were built in 1948, 12"x16" CMU (comprised of 8x8x12 and 4x8x12 CMU alternating).

They're currently supporting a 1 story structure that I need to replace. One end is ledgered to the house and the other end is sitting on a beam, which spans the two piers in question.

Will doweling in a concrete support "ring" add to their stability? They haven't settled or moved in 68 years from what I can tell, but if I can add any support to the piers while I'm at it then it's cheap insurance. The ground is undisturbed at this point. I can do a 4-12" pad with gravel underneath.

What do you guys think?

Crude drawing: http://ift.tt/2sUkDBE

Submitted June 26, 2017 at 03:12PM by JMac87
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CMU Pier Reinforcement Question

How do I know what the maximum voltage for one outlet is?

How do I know what the maximum voltage for one outlet is?

A couple of easy simple questions for engineers who have electrical knowledge. I have a gaming set up, with two monitors, and one massive gaming PC and a desk light. Currently I have an 8 slot Power supply but considering upgrading to the super large 12 or 16 slot one. But how do I know whether or not I'm going to overload the outlet by doing so? I'm not daisychaining anything but I want to know what the maximum power strip size I can use is.

TL: DR: how do I know maximum voltage of wall outlet versus my power strip so I don't overload the outlet?

Submitted June 26, 2017 at 12:22PM by Xilc
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How do I know what the maximum voltage for one outlet is?

Combined Cycle Gas/Steam Piston Engines?

Combined Cycle Gas/Steam Piston Engines?

So I've been looking to work on somewhat of a home project to keep myself entertained and keep my engineering concepts fresh in my head long after college. I've been looking towards using 1 or 2 turbochargers and and axial turbine hooked up to a generator to design some sort of combined gas-powered electricity/steam generator. As far as practicality goes, the project would be damn expensive and not worth it when considering efficiency, required tooling, etc.

So I've been considering the idea of going with a piston engine instead. Piston parts can be cheaply purchased from old compressors, etc, or even manufactured cheaply via a home aluminum foundry. Design/simulation processes will also be significantly easier than using turbines. The goal is a piston engine with either 2 or 4 gas pistons in V or in-line configuration, and a separate steam piston. The steam would be obviously generated via the exhaust gases from the combustion pistons, as well as additional gas feeding to the boiler as necessary.

So that brings me to my question: why has this not been done before? Exhaust gases are pretty damn hot, even after their pressure and kinetic energy are extracted in a turbocharger. A steam piston operates as a power stroke in both directions of piston movement, so I'm sure there's power to be extracted.

My guess would be that the size/weight of having even a small water boiler would make it impractical to put in an automobile when weighing added weight/size vs the amount of additional power the steam would provide. My application is not for transportation, it would be used strictly for power generation, or to power a fan, compressor, etc, maybe even just for fun or to have a cool project.

Another idea I've weighed is changing the cycle from a 4-stroke Otto Cycle to a 6-stroke gas/steam cycle, where after combustion, the steam is allowed to work the same piston. There's obviously cons to this concept as well as you'd have to design a system where the parameters and materials can use both gas and steam.

So what are your guys' thoughts? There's obviously a reason this has not been done, patented, and researched heavily if this were practical. Trying to get some good advice here.

Submitted June 26, 2017 at 11:43AM by ME_2017
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Combined Cycle Gas/Steam Piston Engines?

Stupid lab question: How do I manipulate temperature and pressure of a material at the same time?

Stupid lab question: How do I manipulate temperature and pressure of a material at the same time?

Basically the title, I'm working with a certain type of biomaterial for which I need to manipulate the temperature and the pressure at the same time. Is there any way to do this without using an autoclave?

Submitted June 26, 2017 at 11:49AM by ChroniclerOfSuccess
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Stupid lab question: How do I manipulate temperature and pressure of a material at the same time?