2e153 Practice Test, Set II

91 Questions | Total Attempts: 97

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Practice Test Quizzes & Trivia

Questions throughout the three volumes in the second set specifically for Ground Radio. (I'm in the middle of creating this quiz, there are still more questions to be written)


Questions and Answers
  • 1. 
    Volume 1- Unit 1 For successful communications to take place, the transmitter's carrier output must be...
    • A. 

      Relatively rich in harmonics

    • B. 

      Transmitted in a specific direction

    • C. 

      Relatively stable in frequency and amplitude

    • D. 

      Attentuated to prevent overdriving the receiver input

  • 2. 
    Volume 1- Unit 1 For modulation to take place, what must be present?
    • A. 

      Filtering, heterodyning, nonlinearity, and amplification

    • B. 

      A reference signal, an RF carrier, a modulating signal, and nonlinearity

    • C. 

      Filtering, an RF carrier, a modulating signal, and nonlinearity

    • D. 

      A reference signal, a modulating signal, nonlinearity, and filtering

  • 3. 
    Volume 1- Unit 1 Which statement concerning bandwidth is true?
    • A. 

      Overmodulating increases bandwidth due to the production of harmonics

    • B. 

      Undermodulating increases bandwidth due to the production of harmonics

    • C. 

      Overmodulating increases bandwidth due to the output's increased amplitude

    • D. 

      Undermodulating increases bandwidth due to the output's decreased amplitude

  • 4. 
    Volume 1- Unit 1 Reducing modulation to less than 100% gives...
    • A. 

      More total power

    • B. 

      A reduction in carrier power

    • C. 

      No reduction in carrier power

    • D. 

      A reduction in carrier and sideband power

  • 5. 
    Volume 1- Unit 1 Which statement is true concerning receiver operation?
    • A. 

      In order to change the operating frequency, we must change the IF only.

    • B. 

      When we change frequencies, the IF does not change, the local oscillator frequency does.

    • C. 

      Changing the local oscillator frequency has no effect on our operating frequency.

    • D. 

      When we change frequencies, the IF changes by an amount equal to the change in the local oscillator frequency.

  • 6. 
    Volume 1- Unit 1 Which section of the receiver determines overall selectivity?
    • A. 

      IF filter

    • B. 

      Tunable filter

    • C. 

      Audio detector

    • D. 

      Power supply

  • 7. 
    Volume 1- Unit 1 With an operating frequency of 150 MHz and an IF of 10.7 MHz, which option is a possible image frequency?
    • A. 

      171.4 KHz

    • B. 

      140.7 MHz

    • C. 

      171.4 MHz

    • D. 

      160.14 MHz

  • 8. 
    Volume 1- Unit 1 In an AM receiver's detector circuit, a nonlinear device is necessary to...
    • A. 

      Supply the desired sensitivity of the input circuitry

    • B. 

      Ensure only the proper IF signal is amplified

    • C. 

      Filter out any extraneous signals

    • D. 

      Cause heterodyning

  • 9. 
    Volume 1- Unit 1 What are the basic requirements for any type of heterodyning?
    • A. 

      Sensitivity and nonlinearity

    • B. 

      Sensitivity, nonlinearity, RF carrier signal, and filtering

    • C. 

      Selectivity, nonlinearity, RF carrier signal, and filtering

    • D. 

      Sensitivity, nonlinearity, RF carrier signal, filtering, and conversion

  • 10. 
    Volume 1- Unit 1 Which statement is true concerning diode detectors?
    • A. 

      They are relatively complex devices

    • B. 

      They can only handle relatively small signals

    • C. 

      They give high fidelity detection for signals of sufficient amplitude

    • D. 

      They are relatively simple devices and provide a tremendous amount of power gain

  • 11. 
    Volume 1- Unit 1 What is the output power of the AN/GRC-171B(V)4 transceiver? 
    • A. 

      25 Watts in both AM and FM

    • B. 

      20 Watts in AM, 50 Watts in FM

    • C. 

      20 Watts in AM, 25 Watts in FM

    • D. 

      50 Watts in narrowband, 25 Watts in wideband

  • 12. 
    Volume 1- Unit 1 During transmit operation, what is the purpose of the compressor circuit in the RT-1446 HF Transceiver? 
    • A. 

      Equalize varying voice levels so the audio signal is more uniform in amplitude

    • B. 

      Amplify the microphone audio level to ensure it is of adequate amplitude

    • C. 

      Provides a tune-select signal to the antenna coupler

    • D. 

      Provides heterodyning of the audio and RF carrier

  • 13. 
    Volume 1- Unit 1 What two properties of a transmission line determine its characteristic impedance? 
    • A. 

      Inductance and resistance

    • B. 

      Inductance and capacitance

    • C. 

      Resistance and capacitance

    • D. 

      Length and type of shielding

  • 14. 
    Volume 1- Unit 1 Which statement concerning wavelength is true?
    • A. 

      Wavelength is inversely related to frequency

    • B. 

      Wavelength is directly related to frequency

    • C. 

      Wavelength is determined by length of line

    • D. 

      Wavelength is expressed in lambdas

  • 15. 
    Volume 1- Unit 1 A non resonant transmission line is a line...
    • A. 

      Having reflected waves

    • B. 

      Having no reflected waves

    • C. 

      With a maximum voltage across its open termination

    • D. 

      With a maximum voltage across its shorted termination

  • 16. 
    Volume 1- Unit 1 If a transmission line is terminated in a short...
    • A. 

      Current is at a maximum and voltage at minimum at the termination

    • B. 

      Current is at a minimum and voltage maximum at the termination

    • C. 

      There would be a nominal amount of signal gain

    • D. 

      The line would be nonresonant

  • 17. 
    Volume 1- Unit 1 The ability of an antenna to receive as well as transmit effectively is called
    • A. 

      Fidelity

    • B. 

      Capacity

    • C. 

      Reciprocity

    • D. 

      Transquality

  • 18. 
    Volume 1- Unit 2 Nonsynchronous orbit satellites are in an orbit which is...
    • A. 

      Circular

    • B. 

      Elliptical

    • C. 

      Hyperbolic

    • D. 

      Parabolic

  • 19. 
    Polar orbit has an inclination of...
    • A. 

      45 degrees

    • B. 

      60 degrees

    • C. 

      80 degrees

    • D. 

      90 degrees

  • 20. 
    Volume 1- Unit 2 What are two types of communication satellites?
    • A. 

      Active and Passive

    • B. 

      Active and Real-time

    • C. 

      Delay and Passive

    • D. 

      Delay and Real-time

  • 21. 
    Volume 1- Unit 2 What is the delay of a real-time Satellite?
    • A. 

      0.1 seconds

    • B. 

      0.6 seconds

    • C. 

      1.0 seconds

    • D. 

      1.6 seconds

  • 22. 
    Volume 1- Unit 2 In a Demand Assigned Multiple Access (DAMA) system, which of the following functions as the network control station (NCS)?
    • A. 

      Only a network management system (NMS) outside of the satellite's footprint

    • B. 

      The central network control station (CNCS) at Andrews AFB, MD

    • C. 

      Any remote unit processing the appropriate hardware and software

    • D. 

      The network control element (NCE) at Andrews AFB, MD

  • 23. 
    Volume 1- Unit 2 How many subscribers can a single transponder support by using a Demand Assigned Multiple Access (DAMA) system?
    • A. 

      A maximum of 100

    • B. 

      A maximum of 600

    • C. 

      Roughly 3000

    • D. 

      Several thousand

  • 24. 
    Volume 1- Unit 2 What are the primary missions of the Global Positioning System (GPS)?
    • A. 

      Navigation and timing transfer

    • B. 

      Navigation and nuclear detection

    • C. 

      Navigation and position

    • D. 

      Position and timing transfer

  • 25. 
    Volume 1- Unit 3 What is the maximum raw data rate for the 802.11b standard?
    • A. 

      6 Mbit/s

    • B. 

      11Mbit/s

    • C. 

      25Mbit/s

    • D. 

      54Mbit/s

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