• What do the symbols on an electrical circuit schematic diagram represent?
  • A. Electrical components
  • B. Logic states
  • C. Digital codes
  • D. Traffic nodes
• 2. Which of the following is accurately represented in electrical circuit schematic diagrams?
  • A. Wire lengths
  • B. Physical appearance of components
  • C. The way components are interconnected
  • D. All of these choices are correct
• 3. Which of the following devices or circuits changes an alternating current into a varying direct current signal?
  • A. Transformer
  • B. Rectifier
  • C. Amplifier
  • D. Reflector
• 4. What best describes a relay?
  • A. A switch controlled by an electromagnet
  • B. A current controlled amplifier
  • C. An optical sensor
  • D. A pass transistor
• 5. Which of the following can be used to display signal strength on a numeric scale?
  • A. Potentiometer
  • B. Transistor
  • C. Meter
  • D. Relay
• 6. What component is commonly used to change 120V AC house current to a lower AC voltage for other uses?
  • A. Variable capacitor
  • B. Transformer
  • C. Transistor
  • D. Diode
• 7. Which of the following is commonly used as a visual indicator?
  • A. LED
  • B. FET
  • C. Zener diode
  • D. Bipolar transistor
• 8. Which of the following is used together with an inductor to make a tuned circuit?
  • A. Resistor
  • B. Zener diode
  • C. Potentiometer
  • D. Capacitor
• 9. What is the name of a device that combines several semiconductors and other components into one package?
  • A. Transducer
  • B. Multi-pole relay
  • C. Integrated circuit
  • D. Transformer
• 10. What is the purpose of a fuse in an electrical circuit?
  • A. To prevent power supply ripple from damaging a circuit
  • B. To interrupt power in case of overload
  • C. To limit current to prevent shocks
  • D. All of these choices are correct
• 11. Why is it unwise to install a 20-ampere fuse in the place of a 5-ampere fuse?
  • A. The larger fuse would be likely to blow because it is rated for higher current
  • B. The power supply ripple would greatly increase
  • C. Excessive current could cause a fire
  • D. All of these choices are correct
• 12. What is the function of a product detector?
  • A. Detect phase modulated signals
  • B. Demodulate FM signals
  • C. Detect CW and SSB signals
  • D. Combine speech and RF signals
• 13. What is the function of a mixer in a superheterodyne receiver?
  • A. To reject signals outside of the desired passband
  • B. To combine signals from several stations together
  • C. To shift the incoming signal to an intermediate frequency
  • D. To connect the receiver with an auxiliary device, such as a TNC
• 14. What device takes the output of a low-powered 28 MHz SSB exciter and produces a 222 MHz output signal?
  • A. High-pass filter
  • B. Low-pass filter
  • C. Transverter
  • D. Phase converter
• 15. Which of the following circuits combines a speech signal and an RF carrier?
  • A. Beat frequency oscillator
  • B. Discriminator
  • C. Modulator
  • D. Noise blanker
• 16. Which of the following circuits demodulates FM signals?
  • A. Limiter
  • B. Discriminator
  • C. Product detector
  • D. Phase inverter
• 17. Which term describes the ability of a receiver to discriminate between multiple signals?
  • A. Tuning rate
  • B. Sensitivity
  • C. Selectivity
  • D. Noise floor
• 18. Where is an RF preamplifier installed?
  • A. Between the antenna and receiver
  • B. At the output of the transmitter’s power amplifier
  • C. Between a transmitter and antenna tuner
  • D. At the receiver’s audio output
• 19. Why are UHF signals often more effective from inside buildings than VHF signals?
  • A. VHF signals lose power faster over distance
  • B. The shorter wavelength allows them to more easily penetrate the structure of buildings
  • C. This is incorrect; VHF works better than UHF inside buildings
  • D. UHF antennas are more efficient than VHF antennas
• 20. What should you do if another operator reports that your station’s 2 meter signals were strong just a moment ago, but now they are weak or distorted?
  • A. Change the batteries in your radio to a different type
  • B. Turn on the CTCSS tone
  • C. Ask the other operator to adjust his squelch control
  • D. Try moving a few feet, as random reflections may be causing multi-path distortion

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