Safety/Math
The class of hard hat for electricians
Class E
A resistor used when a high power rating is required.
Wire wound Resistor
Trade size 91 mm conduit in inches?
3 1/2"
At what distance from a box shall the first support for an NMD90 cable be located?
*Double points if code rule stated - 2 minute time limit*
300 mm 12-560(1a)
A thundercloud has a negative charge, and an object on the ground has a positive charge. How will the lightning discharge?
From cloud to ground
Three hazardous working environments
Cold environments, Hot environments, Confined spaces
A resistor that has one ohmic value which cannot be changed or adjusted.
What is a fixed resistor?
Shall non-current carrying conductive parts of electrical equipment be connected to a bonding conductor?
Yes 10-600(1)
Draw a line diagram for a switch, light, and receptacle in that order.
--|l-- Switch --|ll-- Light --|l-- Recep.
Which side of a GFCI receptacle offers downstream ground fault protection
Load Side
What is your last line of defense in an arcing incident?
PPE
State the colour code for a 350 kilo-ohm resistor with a 2% tolerance.
Orange, Green, Yellow, Red
In dwelling units, receptacles shall be installed in finished walls of every room so that no point along the floor line is more than _________ from a receptacle.
1.8 m
What is the red wire of a smoke alarm for?
Communication, if one is set off, they are all set off.
What is the resistance of a resistor with the following colour code: Red, Green, Blue, Silver
25 mega ohms 10% tolerance
100 mA, and ventricular fibrillation.
10 coulombs pass through a resistor (colour code: Red, Green, Black) in 2.5 seconds. Calculate voltage.
10C / 2.5S = 4A
Red, Green, Black = 25 ohms
4A x 25 ohms = 100V
Calculate minimum size EMT for:
6x #8 RWU90 U.J
3x #4 TWU
53 mm/ 2" EMT
12-910(4)(4a)(4c) T-8, T-9G, T-6D
3 way switching
The 20th edition of the codebook came out in this year. (You may use your codebook for this answer)
2006
5 pieces of information that should be written on a Lockout Tag
Name, Contact info, Department, Date/time installed, expected completion
Four resistors connected in parallel have the same colour code: Red, Black, Brown, Gold.
Calculate Total Resistance for the circuit.
RT = 50 Ohms
Can NMD90 be installed in a cable tray?
No T-19
Draw a single line diagram for a light fixture controlled from 3 locations.
-|i-- S3 -|ii- S4 -|ii- S3 -|i- Light
Calculate the ampacity of: 13 - #8 RW90 copper conductors; 12 - #10 R90 copper conductors.
4-004(1c)T-2 T-5C
#8 = 33A
#10 = 24A