i have taken the master electrician test twice and both times i have missed by 2 incorrect answers. i feel like my areas to improve on are the demand factors and motor calculations. im going to try to retest asap while some of the questions are still fresh at memory. where might i get some sample practice calculations that could explain these better. one of the questions that i had incorrect was what is a resistor with with a single orange stripe? what part of the code might this be related to. thanks for any help you may be able to provide.
Resistors need 3 colors to identify them. There are 2 significant digits and a multiplier. BBROYGBVGW = 0-9 If you find some pre WWII resistors you may see a body color (1st digit) a ring (2d digit) and a dot (multiplier). It has just been 3 bands for the last half of the last century. You may also see a 4th bandthat designates tolerance.
Re: help with calculations on test#92554 03/23/0511:09 PM03/23/0511:09 PM
Yup the politically correct one and 2 levels of non-PC diddies (the worst one clearing up the confusion about the "0" color) "bad boys rape our young girls but violet gives willingly" is the moderately unPC one.
I may still have a couple of those roaring 20s resistors with the solid body and dot in my junk box.
Re: help with calculations on test#92556 03/25/0505:33 PM03/25/0505:33 PM
This is a moldy oldie. A half century old 50k resistor Green body "5", black band "0" and orange dot "3 zeros" = 50,000k It measures around 52k, not bad for a 50 year old part that was +/- 20% new http://members.aol.com/gfretwell/resistor.jpg
[This message has been edited by gfretwell (edited 03-25-2005).]