Ect001

20 Questions | Total Attempts: 31216

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Ect001

Priority Level: High (ECE & ECT)


Questions and Answers
  • 1. 
    How fast does a radio wave travel through free space?
    • A. 

      At the speed of light

    • B. 

      At the speed of sound

    • C. 

      Its speed is inversely proportional to its wavelength

    • D. 

      Its speed increases as the frequency increases

  • 2. 
    • A. 

      The wavelength gets longer as the frequency increases

    • B. 

      The wavelength gets shorter as the frequency increases

    • C. 

      There is no relationship between wavelength and frequency

    • D. 

      The wavelength depends on the bandwidth of the signal

  • 3. 
    What property of radio waves is often used to identify the different frequency bands?
    • A. 

      The approximate wavelength

    • B. 

      The magnetic intensity of waves

    • C. 

      The time it takes for waves to travel one mile

    • D. 

      The voltage standing wave ratio of waves

  • 4. 
    What are the frequency limits of the VHF spectrum?
    • A. 

      30 to 300 kHz

    • B. 

      30 to 300 MHz

    • C. 

      300 to 3000 kHz

    • D. 

      300 to 3000 MHz

  • 5. 
    What are the frequency limits of the UHF spectrum?
    • A. 

      30 to 300 kHz

    • B. 

      30 to 300 MHz

    • C. 

      300 to 3000 kHz

    • D. 

      300 to 3000 MHz

  • 6. 
    What frequency range is referred to as HF?
    • A. 

      300 to 3000 MHz

    • B. 

      30 to 300 MHz

    • C. 

      3 to 30 MHz

    • D. 

      300 to 3000 kHz

  • 7. 
    How many volts are equal to one kilovolt?
    • A. 

      One one-thousandth of a volt

    • B. 

      One hundred volts

    • C. 

      One thousand volts

    • D. 

      One million volts

  • 8. 
    Which of the following is equivalent to 500 milliwatts?
    • A. 

      0.02 watts

    • B. 

      0.5 watts

    • C. 

      5 watts

    • D. 

      50 watts

  • 9. 
    If an ammeter calibrated in amperes is used to measure a 3000-milliampere current, what reading would it show?
    • A. 

      0.003 amperes

    • B. 

      0.3 amperes

    • C. 

      3 amperes

    • D. 

      3,000,000 amperes

  • 10. 
    If a frequency readout calibrated in megahertz shows a reading of 3.525 MHz, what would it show if it were calibrated in kilohertz?
    • A. 

      0.003525 kHz

    • B. 

      35.25 kHz

    • C. 

      3525 kHz

    • D. 

      3,525,000 kHz

  • 11. 
    What is the unit of frequency?
    • A. 

      Hertz

    • B. 

      Henry

    • C. 

      Farad

    • D. 

      Tesla

  • 12. 
    What is the abbreviation that refers to radio frequency signals of all types?
    • A. 

      AF

    • B. 

      HF

    • C. 

      RF

    • D. 

      VHF

  • 13. 
    What is the name for the distance a radio wave travels during one complete cycle?
    • A. 

      Wave speed

    • B. 

      Waveform

    • C. 

      Wavelength

    • D. 

      Wave spread

  • 14. 
    • A. 

      Wavelength in meters equals frequency in hertz multiplied by 300

    • B. 

      Wavelength in meters equals frequency in hertz divided by 300

    • C. 

      Wavelength in meters equals frequency in megahertz divided by 300

    • D. 

      Wavelength in meters equals 300 divided by frequency in megahertz

  • 15. 
    What is the approximate velocity of a radio wave as it travels through free space?
    • A. 

      3000 kilometers per second

    • B. 

      300,000,000 meters per second

    • C. 

      300,000 miles per hour

    • D. 

      186,000 miles per hour

  • 16. 
    How many milliamperes is 1.5 amperes?
    • A. 

      15 milliamperes

    • B. 

      150 milliamperes

    • C. 

      1,500 milliamperes

    • D. 

      15,000 milliamperes

  • 17. 
    What is another way to specify a radio signal frequency of 1,500,000 hertz?
    • A. 

      1500 kHz

    • B. 

      1500 MHz

    • C. 

      15 GHz

    • D. 

      150 kHz

  • 18. 
    How many volts are equal to one microvolt?
    • A. 

      One one-millionth of a volt

    • B. 

      One million volts

    • C. 

      One thousand kilovolts

    • D. 

      One one-thousandth of a volt

  • 19. 
    How many microfarads are 1,000,000 picofarads?
    • A. 

      0.001 microfarads

    • B. 

      1 microfarad

    • C. 

      1000 microfarads

    • D. 

      1,000,000,000 microfarads

  • 20. 
    • A. 

      Both the frequency and amplitude of the modulating signal

    • B. 

      The frequency of the modulating signal

    • C. 

      The amplitude of the modulating signal

    • D. 

      The relative phase of the modulating signal and the carrier