I went in today to apply for the welding position at a local medical supply factory and had to take a blueprint test. I don't know about any of you but I found it to be very hard and misleading at times, I think this will probably not allow me to work for them, unless they want to take the time to walk me through the prints the firts few times.

 

that sucks

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dfoxengr &raquo;</TD></TR><TR><TD CLASS="quote">that sucks </TD></TR></TABLE>

Your telling me, I thought it would be like reading any NORMAL blue print but on this one they would ask what dimension a certain line was and the line wouldn't have any measure or form of measurment......it was just really hard. I hope I pull through on my "educated" guesses since this job pays very well.

Wish me luck

 

thats probably because REAL blueprints dont over-dimension stuff and you need to use simple geometry and addition skills to figure them out.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dfoxengr &raquo;</TD></TR><TR><TD CLASS="quote">thats probably because REAL blueprints dont over-dimension stuff and you need to use simple geometry and addition skills to figure them out.</TD></TR></TABLE>

Are you agreeing that blueprints they gave me are hard or are you just poking fun at my lack of knowledge? I can't tell.

Also, anyone know what the Metric Decimal form for 1.75 would be?

 

i have no idea what these blueprints are of, look like, have on them so i couldnt say they are "hard"

dimensioning is just simple logic.

and the metric decimal for 1.75 is 1.75 unless you would like to associate some units with that.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dfoxengr &raquo;</TD></TR><TR><TD CLASS="quote">i have no idea what these blueprints are of, look like, have on them so i couldnt say they are "hard"

dimensioning is just simple logic.

and the metric decimal for 1.75 is 1.75 unless you would like to associate some units with that.</TD></TR></TABLE>

I wasn't trying to insult you, I just thought I might have taken your previous statement wrong. What exactly is dimensioning? I know what dimensions are but when they give you a simple line labled "R" and ask you the dimension, I had no idea.

 

what are the units for 1.75?

and he said

R
-----------------------------------------

how long is that line...thats it?
i cant believe that, there were probably dimensions in other places, and you couldve deduced the length of R by them and by logic.

 

Anyone who's been through 8th grade geometry can read geometric data from a print. Its the symbols, stacking tolerances, and such that tend to thow people when they haven't seen something before. If you can read a simple print, try paging through a book on GD&T with all its associated mumbo jumbo, I'm sure you can figure it out.
I know engineering students that still have troulbe reading sectioned drawings and assembly prints. So don't feel bad, if everything was stupidly easy, monkeys would rule the world.
Anyways, a thank you card (for the interview/test) and a call saying you're a hard worker can go a long way to getting a job. Good luck LSEGHatch.

 

Welding blueprints are a bit different from normal blueprints. I'm pretty sure I have my 'Blueprints for Welders' book somewhere from when I took a class on it. If you want I can send it to you, I have no real use for it anymore. Slightly older version of this - http://www.constructionbook.co...2.htm

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dfoxengr &raquo;</TD></TR><TR><TD CLASS="quote">what are the units for 1.75?

and he said

R
-----------------------------------------

how long is that line...thats it?
i cant believe that, there were probably dimensions in other places, and you couldve deduced the length of R by them and by logic.</TD></TR></TABLE>


1. There were no units given for 1.75.
2. R was a line that they were asking the dimension of, nothing given on that line.....Anywhere, it was just labaled "R"


BACKPURGE, if you don't mind, I wouldn't mind adding that book to my collection.

 

doesnt have to be on that line. you can deduce dimensions of one thing from dimensions of other things.

also the units were on the page somewhere im sure.

 

If you get a Geometric Dimensioning and Tolerancing book, make sure it uses the "updated" language which was implemented in 1986 (if I recall correctly).

 

We use "R" when refering to a radius. Like an edge will have a R.06".
All features on a print are only dim'd once. Addition dims are sometimes used to keep too many stackups from happening, but these are labeled as "REF" and are not used when quality checking a part.

 

blueprints are a little misleading at some points with the arrows pointing every which way, and the weld symbols being on top and bottom...

sucks that they will over look you for not being able to read them.. i hope all works out for you..

 

I think too often people are used to the over dimensioning they teach you in intro to cadd classes. I know it was a little hard to get used to the Dimensioning rules and GD&T when taking engineering classes.

My guess is that you could have deduced the measurements from other information given to you on the drawing.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mrlegoman &raquo;</TD></TR><TR><TD CLASS="quote">We use "R" when refering to a radius. Like an edge will have a R.06".
All features on a print are only dim'd once. </TD></TR></TABLE>

When there is just an "R" it means full radius. This implies that you can calculate the radius of the curve based on other dimensions.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mrlegoman &raquo;</TD></TR><TR><TD CLASS="quote">Addition dims are sometimes used to keep too many stackups from happening, but these are labeled as "REF" and are not used when quality checking a part.</TD></TR></TABLE>

Another common way to represent reference dimensions are just to put a dimension in "()". As "mrlegonman" noted, these dimensions should never be used for anything other than quick reference (hence the name). They are based on nominals.

I did not have any exposure to GD&T in school and it wasn't until I started working that I discovered how important proper dimensioning is to get the part you are asking for. Max/ min material conditions, symmetry, datums, basic and toleranced dimensions, true position, etc... I had never seen any of this before. A good book to pick up is:

http://www.thattechnicalbookst...6.htm

If you have any specific questions feel free to ask, I will give you my best answer. Also you need to pay attention to what year ANSI or ASME standard is being used, definitions and assumptions have changed between the editions ('73, '82, '94, '00)

~SKY~