Answer Key: Self-Test C-2.2
- What are the four basic components of any circuit?
- Source, switch, load, conductors
- What is the function of a circuit breaker or fuse?
- To act as a switch that opens in the event of too much current flow
- What is alternating current?
- Current that alternates its direction
- How is the formula for Ohm’s law expressed?
- All of the above
- If a circuit is powered by 120 volts and has a total resistance of 600 ohms, how much current is running through the circuit?
- 0.2 amps
- What is the voltage in a circuit that carries 0.5 amps with a resistance of 200 ohms?
- 100 volts
- Which definition best describes a series circuit?
- There is only one path for electricity to flow through.
- What is one advantage of using parallel circuits rather than a series circuit?
- The ability to de-energize one leg of the circuit without affecting the others
- What would a three-way switch controlling a hallway light be an example of?
- An SPDT switch
- What is the term given to a coil of wire into which an iron armature is drawn?
- A solenoid
- Which of the following best describes power?
- Work performed
- Which two factors affect power?
- Voltage and amperage
- What kind of AC power supply would you expect to find in an industrial setting?
- Three-phase power
- What voltage potential would you expect to find in a small shop with three-phase power supply?
- 208 VAC
- Which of the following best describes why cities commonly use AC in public infrastructure?
- AC can be easily stepped up and transmitted over long distances
- Which of the following statement best describes Kirchhoff’s law when applied to voltage in a series circuit?
- Voltage available is equal to voltage drop over entire circuit.
- Which of the following is both a load and a switch?
- Relay
- Which of the following best describes a transformer that reduces 120 VAC to 24 VACf?
- Step-down
- Which term best describes two metal plates separated by an insulative material for storage of a charge?
- Capacitor
