Electricity chapters 1 - 7 review

How many prongs does a grounded, polarized plug have?

• One

• Two

• Three

• Four

What is the primary function of the ground-fault circuit interrupter (GFCI)?

• To convert an ac outlet into a dc outlet

• To convert a dc outlet into an ac outlet

• To ensure a consistent flow of current in water

• To protect people from an electrical shock

Leaded solder is made of lead and _____.

• silver

• bismuth

• copper

• tin

What is the smallest particle of an element?

• Nucleus

• Proton

• Molecule

• Atom

An atom is considered neutral when it has _____.

• more protons than electrons

• more electrons than protons

• an equal number of protons and electrons

• more neutrons than protons or electrons

What happens to a circuit breaker when the circuit is forced to carry too much current?

• It burns out.

• It opens.

• It reduces the current without deactivating the circuit.

• It increases the capacity of the circuit.

What does the Greek letter omega () represent?

• Volts

• Amperes

• Ohms

• Coulombs

The volume control on a stereo is an example of a(n) _____.

• potentiometer

• superconductor

• rheostat

• ohmmeter

A voltmeter must be ____.

• connected in series

• placed near a magnetic field

• connected in parallel

• used in a de-energized circuit

Which of the following meters must supply its own power source to the circuit under test?

• Voltmeter

• Wattmeter

• Ammeter

• Ohmmeter