Safety
These are the three types of energy that may be locked out
Electrical energy, mechanical energy, and fluid energy
Ohm's Law describes the relationship between the ____________, ____________, and ____________ of a circuit
Voltage, current, resistance
Calculate the total resistance of a series circuit with 150 ohm, 1K ohm, 2.2k ohm, and 100 ohm resistors
3,450 ohms
Name the three subatomic particles that compose the atom
Protons, neutrons, and electrons
Wire is available in two basic types: ___________ and ____________
Copper and aluminum
What is the next step to take after locking out and tagging a piece of equipment?
It should be tested to make certain it is truly de-energized.
What is the supply voltage of a circuit that draws 0.155 A and has a total resistance of 2k ohms?
310 volts
Calculate the total resistance of a parallel circuit with 175 ohm, 1k ohm, 1.8k ohm, and 500 ohm resistors.
108 ohms
What is the Law of Charges?
Like charges repel and unlike charges attract
Would 750' of #14 wire have a higher or lower resistance than 750' of #8 wire?
Higher
This is the single greatest cause of electrical fires
Poor or loose connections
If the supply voltage is 24 V and the total circuit resistance is equal to 750 ohms, what is the total current?
32 mA
Calculate the total resistance of a parallel circuit containing five resistors each with a value of 25 ohms
5 ohms
Resistance opposes the flow of ____________.
Electrons
True or false: Ampacity of a wire is affected by temperature
True
How do GFCI's work?
They sense the amount of current flow on both the ungrounded and grounded conductors supplying power to a device. They should be equal.
The current in a series circuit measures 1.2 A and the source voltage is 24 V. What is the total resistance?
20 ohms
Kirchhoff's voltage law states the sum of the _______________ around any closed circuit is zero
Voltage sources and voltage drops
Electromotive force is also referred to as ____________.
Voltage
The maximum operating temperature of TBS wire is ____________.
90 degrees C
What section of the NEC covers grounding?
Article 250
What is the value of a resistor with the following color bands: yellow, blue, black, orange, brown
460K +/- 1%
If a toaster operates on 120 V and has a measured resistance of 30 ohms, how many watts of power does it consume?
480 watts
Name five good conductors
Copper, aluminum, gold, platinum, silver, nickel, zinc, iron, tin, and lead
A #8 conductor 500' long has a resistance of 1.817 ohms. The ambient temperature is 20 degrees C. Of what material is the wire made?
Iron