What materials make a good insulator?

Tech A says a resistor is a component designed to extract energy from the current flow. Tech B says he uses a voltmeter to check for a voltage drop. Who is correct?

Tech A says you must have power supply for a simple circuit to work. Tech B says a switch will interrupt. Who is correct?

True or False. Volts, amps, and ohms are the three basic units of electrical measurement.

Tech A says AC stands for alternating voltage. Tech B says DC is used in electric motors on most hybrid vehicles. Who is correct?

Tech A says a battery charger has to have a transformer and a rectifier to produce DC volts. Tech B says you can run an AC motor on DC volts. Who is correct?

Tech A says when you ground a circuit, you hook it back to the positive side of the battery. Tech B says some manufactures use the chassis as a return path to the battery. Who is correct?

Continuity is:

Tech A says high resistance causes an increase in current flow. Tech B says a voltage drop is another name for high resistance. Who is correct?

Electrochemical energy is produced when:

Tech A says quartz crystals under mechanical stress will produce a voltage. Tech B says the piezoelectric principle is used in coolant temp sensors. Who is correct?

What is one by-product of electricity flow?

Ohm's law tells us that it takes 1 volt to push 1 amp through how many ohms?

In calculating ohm's law:

You have a 4 ohm resister and the battery is charged to 12 volts. How many amps will flow in the circuit?

Tech A says power is the rate at which work is performed. Tech B says 1 watt is produced when 12 volts cause 1 amp of current to flow. Who is correct?

How many paths are there in a series circuit?

Tech A says parallel circuits are like links in a chain. Tech B says total current in a parallel circuit equals the sum of the current flowing in each branch of the circuit. Who is correct?

Tech A says in a parallel circuit, the more branches that are added, the more current flow increases. Tech B says a series-parallel circuit is made of parallel circuits only. Who is correct?

A switch is used to:

Tech A says a flasher works just like a fuse. Tech B says flasher cans are mechanical devices while flasher controls are generally electronic devices. Who is correct?

Tech A says relays are turned on and off by a small amount of current. Tech B says there are two types of relays: normally closed (NC) and normally open (NO) types. Who is correct?

Tech A says there are three standard labeling systems for relays. Tech B says relays are labeled 85, 86, 30, 87a, and 87, or 1, 2, 3, 4, and 5. Who is correct?

Tech A says a solenoid is not used on modern automobiles. Tech B says fuel injectors and starter motor solenoids are two of many solenoids used on modern automobiles. Who is correct?

What are the two main components of an electric motor?

What are the three types of resistors?

How many systems on a car are controlled electronically?

Tech A says the transistor is a key component in any electronic device. Tech B says there are three types of transistors. Who is correct?

Tech A says central processing units (CPUs) are found in electronic control units (ECUs) of modern automobiles. Tech B says delay circuits are used to turn on or off electrical devices. Who is correct?

Tech A says shielded wiring has five forms. Tech B says twisted pair shielding is where the wire is twisted together. Who is correct?

Tech A says wire size is very important. Tech B says there are two scales used to measure wire size. Who is correct?

Tech A says copper has a low resistance. Tech B says the length of wire doesn't affect resistance. Who is correct?

Tech A says wiring diagrams are like maps of the entire electrical system. Tech B says wiring diagrams have very little information and aren't much help. Who is correct?

Tech A says a modern automobile has more than 1 mile of wiring. Tech B says there are around 1,000 individual wires. Who is correct?

Tech A says fiber optic cables are more expensive and very heavy. Tech B says fiber optics can only carry very little data. Who is correct?

Tech A says you should never strip wires with a knife or other sharp tool. Tech B says it's ok to repair wires with solderless connectors if done properly. Who is correct?

Tech A says you should use a rosin core solder when repairing electrical circuits. Tech B says you should not overheat the repair. Who is correct?

Controlled area network bus (CAN-bus) systems carry:

Controlled area network bus (CAN-bus) systems should be checked using a(n):