Chapter 8 Chapter Test - Principles of Electricity

Which of these mathematical statements describes Watt’s law?

• a.Power = Voltage × Amperage

• b.Power = Voltage × Resistance

• c.Voltage = Power × Amperage

• d.Voltage = Amperage / Power

According to conventional electrical theory, which way does electricity move in most commercial vehicle chassis?

• a.From the negative ground, through the load, then back to the battery

• b.From the "hot" insulated wire, through the load, then back to the battery

• c.From negative charge potentials to positive charge potentials

• d.Electrons leave the negative terminal of the battery and return through the positive post

Consider an atom with 28 protons and 29 electrons. It could be accurately described as:

• a.Aluminum

• b.Negatively charged

• c.Positively charged

• d.Anion

Consider the principle of Joules heating. Which of the following units of electrical measurement changes when amperage increases through a circuit?

• a.Resistance

• b.Voltage

• c.Farads

• d.Capacitance

Consider two objects with electrical charges. Objects A and B both repel one another. What is the polarity of the charges found on the objects?

• a.A is positive, B is negative.

• b.A and B are both positive.

• c.A is negative, B is positive.

• d.A is negative, B is neutral.

Technician A says AC circuits are used in virtually all chassis circuits because a battery can easily store and supply AC current. Technician B says DC current is used to power hybrid drive electric motors. Who is correct?

• a.Technician A

• b.Technician B

• c.Both Technician A and Technician B

• d.Neither Technician A nor Technician B

Technician A says AC's main advantage is that it can be transmitted farther distances with less resistance and little voltage drop. Technician B says the term resistance is used with AC circuits as well as DC circuits. Who is correct?

• a.Technician A

• b.Technician B

• c.Both Technician A and Technician B

• d.Neither Technician A nor Technician B

Technician A says electronic circuits use less amperage and often process electrical signals rather than perform the work of lighting, heating, and mechanical movement. Technician B says electrical circuits usually conduct higher amounts of current through heavier conductors and commonly operate high current flow devices, such as solenoids, relays, motors, lights, and more. Who is correct?

• a.Technician A

• b.Technician B

• c.Both Technician A and Technician B

• d.Neither Technician A nor Technician B

Technician A says metals typically have lots of easily moved electrons, which make them good conductors. Technician B says liquids cannot function as a conductor. Who is correct?

• a.Technician A

• b.Technician B

• c.Both Technician A and Technician B

• d.Neither Technician A nor Technician B

Technician A says that Ohm's Law predicts increased circuit resistance as voltage increases. Technician B says Ohm's Law predicts both amperage and voltage in a circuit vary depending on circuit resistance. Who is correct?

• a.Technician A

• b.Technician B

• c.Both Technician A and Technician B

• d.Neither Technician A nor Technician B