Which of the following devices or circuits changes an alternating current into a varying direct current signal?

1. A Transformer
2. B Rectifier
3. C Amplifier
4. D Reflector

What is a relay?

1. A An electrically-controlled switch
2. B A current-controlled amplifier
3. C An inverting amplifier
4. D A pass transistor

Which of the following is a reason to use shielded wire?

1. A To decrease the resistance of DC power connections
2. B To increase the current carrying capability of the wire
3. C To prevent coupling of unwanted signals to or from the wire
4. D To reduce receiver overload

Which of the following displays an electrical quantity as a numeric value?

1. A Potentiometer
2. B Transistor
3. C Meter
4. D Relay

What type of circuit controls the amount of voltage from a power supply?

1. A Regulator
2. B Oscillator
3. C Filter
4. D Phase inverter

What component changes 120 V AC power to a lower AC voltage for other uses?

1. A Variable capacitor
2. B Transformer
3. C Transistor
4. D Diode

Which of the following is commonly used as a visual indicator?

1. A LED
2. B FET
3. C Zener diode
4. D All these choices are correct

Which of the following is combined with an inductor to make a resonant circuit?

1. A Resistor
2. B Zener diode
3. C Potentiometer
4. D Capacitor

What is the name of a device that combines several semiconductors and other components into one package?

1. A Transducer
2. B Multi-pole relay
3. C Integrated circuit
4. D Transformer

What is the function of component 2 in figure T-1?

1. A Give off light when current flows through it
2. B Supply electrical energy
3. C Control the flow of current
4. D Convert electrical energy into radio waves

Which of the following is a resonant or tuned circuit?

1. A An inductor and a capacitor in series or parallel
2. B A linear voltage regulator
3. C A resistor circuit used for reducing standing wave ratio
4. D A circuit designed to provide high-fidelity audio