Safety and Math
What does NRR stand for?
Noise Reduction Rating
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*
Within 300mm (or 1 foot)
12-510(1a)
As little as _______ milliamps can be lethal.
15
List 5 damaging effects of an arc flash on the human body.
Burns, eye damage, internal damage, shrapnel in the body, hearing damage.
A measure of charge.
A coulomb
Shall non-current carrying conductive parts of electrical equipment be connected to a bonding conductor?
Yes 10-600(1)
Draw the line diagram for a circuit wired with a switch, light and receptacle in that order.
What is the receptacle configuration for a range receptacle in a dwelling unit?
14-50R 26-744(4)
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
The constant power wires closest to the breaker go to which side on a GFCI receptacle?
Line side
What are the 3 systems used to measure magnetic values?
English, SI, CGS
What tool is used to verify absence of voltage?
Voltmeter or Multimeter
List 3 examples of Diamagnetic Metals.
Copper, Brass, Antimony
Shall audio amplifiers for transmitters be suitably housed and ventilated?
Yes, 54-1006
What is the red wire of a smoke alarm for?
Communication, if 1 smoke alarm is set off, they are all set off.
In a box fill calculation, what is the space taken up by a #10 insulated conductor?
36.9 mL 12-3034(4)
A conduit has an inside diameter of 2", and an outside diameter of 2 5/16". Find the Wall thickness.
5/32"
3 resistors are connected in series. RT = 400 ohm, R1 = 75 ohm and R2 = 135 ohm. Solve for R3
R3 = 190 ohm
Can NMD90 be installed in a cable tray?
No 12-102(3) T-19
A method of controlling a light from more than 2 locations.
4-way switching
If 75 coulombs pass through a resistor in 3 seconds, and the resistor is connected to a 275 V source. State the colour code of the resistor with a 1% tolerance.
*DAILY DOUBLE*
Brown, Brown, Black, Brown