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help with calculations on test #92550
03/22/05 11:05 PM
03/22/05 11:05 PM
K
knopp  Offline OP
Junior Member
Joined: Jun 2004
Posts: 2
richmond, va
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.

2017 / 2014 NEC & Related Books and Study Guides
Re: help with calculations on test #92551
03/22/05 11:58 PM
03/22/05 11:58 PM
G
gfretwell  Offline

Member
Joined: Jul 2004
Posts: 9,167
Estero,Fl,usa
"what is a resistor with with a single orange stripe? "


Missing 2 stripes?


Greg Fretwell
Re: help with calculations on test #92552
03/23/05 09:13 PM
03/23/05 09:13 PM
G
George Little  Offline
Member
Joined: Jan 2004
Posts: 1,489
Michigan USA
Are ou sure it was a resistor and not a diode? A diode has a single band on one end sometimes but it's usually black.

What color was the "resistor"?

[This message has been edited by George Little (edited 03-23-2005).]


George Little
Re: help with calculations on test #92553
03/23/05 09:46 PM
03/23/05 09:46 PM
G
gfretwell  Offline

Member
Joined: Jul 2004
Posts: 9,167
Estero,Fl,usa
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.


Greg Fretwell
Re: help with calculations on test #92554
03/23/05 10:09 PM
03/23/05 10:09 PM
G
George Little  Offline
Member
Joined: Jan 2004
Posts: 1,489
Michigan USA
Greg- Your revealing your age there buddy-
Do you remember the little diddy that went with "BBROYGBVGW"?

[This message has been edited by George Little (edited 03-23-2005).]


George Little
Re: help with calculations on test #92555
03/23/05 11:29 PM
03/23/05 11:29 PM
G
gfretwell  Offline

Member
Joined: Jul 2004
Posts: 9,167
Estero,Fl,usa
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.


Greg Fretwell
Re: help with calculations on test #92556
03/25/05 04:33 PM
03/25/05 04:33 PM
G
gfretwell  Offline

Member
Joined: Jul 2004
Posts: 9,167
Estero,Fl,usa
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).]


Greg Fretwell

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