SRK Engineering Thread

So close

any help would be appreciated.

I need to find a value of conversion (x) for a CSTR reactor that will give me a volume equal to one in a PFR. The conversions of both reactors cannot equal because of the fundamental designs of each reactor. so the X that belongs to the PFR, does not equal the x of the CSTR, otherwise the answer would be impossible.

I know I should be able to integrate d(V) to some volume that corresponds to the PFR. However the introduction of the n (can vary wildly) makes things significantly more challenging, and the only way I know of integrating that is through taylor representation. and I don’t know if I even did the integration correctly. I had my ti-89 differentiate the dx side of the equation 3 times, and there is a pattern of infinite differentiability, so I had wolfram alpha do the tranformation for me.

Is this valid, or am i reachign and way of base. All this for an extra credit problem too.

it did just hit me,

it could be first order.

for every two moles of A you consume, you get a pair of two molecules in linear fashion at the rate you consume the reactant, making the order 1, and making n = 1. so n doesn’t matter, it’s always one.

Well I have a civil engineering degree and went onto a network engineering career. That’s my contribution to this thread.

Did you take an internship or job in the subject of civil engineering?
I have been through a course for construction management; it’s tough as I do not have related work experience.
Edit: Well the class I’m taking under that field is Construction materials & methods 1.

For now I want to find any kind of work while taking classes in college.

@ pedoviejo

[details=Spoiler]read the textbook.
:slight_smile: [/details]

Nope. I graduated around 2012 which was a pretty bad time for civil eng jobs. Barely anyone I knew actually landed anything. So my first job was straight into a networking support desk 9 months later.

For math I’m in intermediate algebra & geometry.

…The next course is college level algebra/trigonometry.
Then comes pre-calculus, before calculus.

This is going to take some time.

@ mowr. Yea, my construction professor said on the first day that there will not be work if there is no demand for buildings, structures and projects. Employment will be narrowed.

I’m an elec. eng who was focused on electronics and systems, but my career went down the “power” and construction route.

Construction - especially commercial - follows the president. In between Presidents/election years are BAD times to come out as most agendas seem to be clearing up, or funds were set to expire. When Bush was in office, all the BRAC work was HUGE, especially in the Washington DC and Texas areas. It’s cooled off drastically with Obama in office with the focus shifting to healthcare…but as we got closer to the end of his term, that work slowly dried up as right now, no one knows what direction things will go. With the improved economy, business are popping back up again - but they are simply renting out existing spaces that have been vacant due to the economy going upside down. I’m most likely getting let go tomorrow actually sad Unreall is sad, on laptop job searching, taking a break on SRK as there just wasn’t much work for the company I am ‘currently’ employed by. On top of that, companies were able to stretch what personnel did during the bad economy and are continuing to push those rates, middling the “need” for new man-power.

I wish I could make a living off music sad

  • Unreall

Yeah being in the engineering field isn’t all it’s made out to be sometimes. Right now I do a lot of design work, (which really amounts to drawing lines all day on a computer…)

Merry Christmas GD folk!

Haven’t ventured into this side of the forum in a while, but I’ve had some big changes in my career over the past couple of weeks, which might serve as useful info and cautionary tales to any of the younger engineers and graduates on here.

Last time I was on this thread, I was taking some time out from Aircraft Engineering after 10 years to try out software engineering - admittedly, the aviation industry was kicking the living shit out of me and my lifestyle was unsustainable, commuting around 1000 miles a week and working 70-90 hour weeks to pay for it all.

I moved home and worked for a software startup of around 50 people, largely ran by the owner and his friends and family. I wont get into the rest of it yet, as its still ongoing, but the business fell short and it has left me and everyone else broke, unpaid and jobless for the holidays. Admittedly, you take on the risk and volatility of a startup when you join one - anything can rock the boat and even if you do everything right you can be left out on your arse. Its unpleasant, but its always a possibility and, for me and my colleagues, that’s what’s happened.

So, with no other option, I’ve gone back into aircraft as a contractor. I’ve done temp work and fixed-term type stuff in the past, but this is the first time I’ve ever worked in engineering as a sole trader. It always scared the shit out of me and I had the impression that it was complicated and hard work to keep on top of, not to mention there’s always the possibility of going without work for long periods of time.

However, over the course of the past 4-5 days, I’ve managed to set myself up as my own business, re-train, re-certify, register with an accountant and secure my first contract. Costing me around £175 for training, certificates, admin fees etc. It wasn’t that hard, wasn’t that time consuming and everyone so far has been really helpful in telling me what I should be doing.

Trickiest part was naming a price for my first contract, since I’ve never had to do it before, but I asked around, then went in with a higher number. They came back with a lower rate which I accepted immediately and was still better than any permanent job rate - I’m sure I’ll start getting cockier with that stuff once I have more of an idea of how that side of the world works.

Time will tell as to how much better or worse it will be than permanent work, but I think I’m going to explore it for the time-being. If there’s anyone else out there with contracting on their mind, I’m happy to share my experiences as they come along. Starting the first contract today, so may have an update quite soon.

Edit: Apologies for the late update! Busy time of year.

Done a little over a full shift now on contract, bit more paperwork to be done here and there, very important to keep invoices, timesheets and logs of any work carried out. Still everyone’s been pretty good about keeping me in the right - we’ll know soon enough if/when I get paid.

Despite seeing a fair share of Contractor-bashing in my time I got a warm reception from 99% of the people I’d be working with and was even allowed to share jobs with people on permanent contracts (sometimes a no-no if there’s a union about).
Been tested quite rigorously by the management, since I’m only here briefly and they need to know be capabilities and limitations as quickly as possible. Added to this, there are a few things that’d I’d typically do that I can’t do here. It’s important to not take that sort of stuff personally - it’s due diligence at the end of the day, which means asking people to check your work or do things for you that you’re fully capable of, rather than trying to be the hero.
Working on contract has also meant showing some restraint in terms of how much work I do too, as doing something I’m not paid to do, no matter how much good will is involved, can result in something appearing on an invoice that shouldn’t be there, so keeping to the bare, on-paper workload is really important too.

That’s about it really - be honest, be humble, be polite, do your paperwork!
No other local contracts have appeared and this one is starting to run out, so the next one may well be an away job. Will keep you all posted.

So at work right now, the internet is down. ping google and they don’t respond, I feel cut off and all alone without google always watching me.

Now what’s funny is all of our vehicles’ command and control units have a cell connection and VPN.
So through wifi I’m connected to the CCU, writing a post on this forum, while waiting for something to pull from git at about 200 KBps.

I should figure out how to create a wifi hotspot from my cellphone.

Who has a FE pdf?

torrent sites where taken down and can’t find shit anymore because google is weak

uuuh… like a study book or something?

@“Tekno Virus” I’m sure that’s what he means. There is a thick ass study booklet to prepare for the exam. My opinion: Look in your university library nigga!

Not free answer: Just take the prep course boi.

I think I got mine for like $30 or something.