DC Theory
The formula to calculate the total resistance of resistors connected in series is:
RT = R1 + R2 + R3......
To protect your eyes from flying objects and shrapnel throughout the regular work day, what PPE must be worn?
What is safety glasses.
Load of lighting and receptacle circuits, based on the outside dimensions of a specific area of building occupancy, as listed in Table 14
A portion of a circuit where the point of control is wired after the device it is controlling.
Safety
Death caused by exposure to electricity
What is Electrocution
The measure of a materials ability to become magnetized.
What is permeability.
Who may remove a lockout lock?
The person that installed it.
The receptacle configuration for an electric range installed in a dwelling unit.
14-50R - 26-744(4)
To provide ground fault protection to a receptacle after a GFCI receptacle, it must be wired to which terminals.
Load terminals.
Code
Suitable marking tape shall be buried halfway between an underground installation and grade level.
12-012(11)
Given values for current and resistance. The quickest formula to solve for power.
P = I2 x R
Two symbols that must be found on work boots.
What is CSA - green triangle
Ohm Symbol - Orange
Receptacles rated 30A or more and installed facing downward shall have provision for locking or latching to prevent unintentional detatachment.
26-700(6)
To control a light from 2 locations, what type of switching is used?
What is 3-way switching
AC Theory
A resistor and an inductor are connected in series. R=80 ohms. XL=25 ohms. Calculate total impedance.
Z=83.81 ohms
A variable resistor with 2 terminals.
What is rheostat
(Delmars 7th edition pg 117)
The correct lean angle for an extension ladder.
4:1. 1 foot out for every 4 feet up.
What demand factor shall be applied to an electric furnace for the purpose of residential service calculations?
100% - 62-118(4)
A ground fault circuit interrupter will trip at _____ of current to ground.
4 - 6 mA
DC Theory
Either metal or non-metals that cannot be magnetized.
What is Diamagnetic.
A 3 band resistor has the colour code Brown, Blue, Blue. What is the resistance and tolerance?
16 mega-ohms plus or minus 20%
The additional PPE required to operate an abrasive cut-off saw or angle grinder.
What is face shield.
Dryer and Range cables are for use in household dryer and range power supply cords only. Are these cables permitted to be sold to the public for general use.
No - 12-402(1) T-11 Note 2
A device which must be wired to an un-switched lighting circuit. Mounted 14" down from the ceiling.
Code
Is it necessary to install a receptacle in the organ loft of an electrically operated pipe organ?
Yes - 26-900(2)