Electrical safety
What method is used when equipment is being serviced?
Lockout/Tagout
What particle orbits the nucleus?
Electron
For a circuit to operate it must be _____.
Closed/Complete
What is electrical power measured in?
Watts
Three parallel loads each draw 6 amps. What is total current?
18 Amps
What class extinguisher is used for kitchen fires?
Class K
Voltage is also known as what type of force?
Electromotive Force (EMF)
What are the three main components of a circuit?
Power source, conductors, and load.
What is the formula for power?
P = I × E
In a parallel circuit, all branches have the same what?
Voltage.
In the Live-Dead-Live method, how many times is voltage checked?
Twice on a known live source and once on the circuit being tested.
One coulomb equals the charge of approximately how many electrons?
6.24 × 10¹⁸ electrons.
What device controls a circuit?
Switch
A device uses 1000 watts and 100 volts. How much current does it draw?
10 amps.
A series circuit has a total current of 12 amps. How much current flows through each load?
12 amps.
Most double-insulated power tools use what type of plug?
Two-prong plug
According to the Law of Charges, what do like charges do?
Repel each other
What occurs when opposite potentials come into direct contact?
A direct short (short circuit).
An electric heater operates at 120 V and 20 A. How much power is consumed?
2400 watts.
True or False: A complex circuit is also called a series-parallel circuit.
True.
True or False: Direct physical contact is required to receive an electrical shock.
False
What happens when an electron leaves its orbit?
It becomes a free electron.
A circuit without resistance results in what?
Unrestricted current flow.
The electromotive force required to push 1 amp through 1 ohm equals one _____.
Volt
A parallel circuit contains a 12 Ω branch and a 6 Ω branch. What is total resistance?
4 Ω