3D152 Volume 3

100 Questions | Total Attempts: 778

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3D152 Quizzes & Trivia

Questions and Answers
  • 1. 
    One disadvantage  of microwave wavelengths is that the frequencies are susceptible to
    • A. 

      Line noise

    • B. 

      Weather effects

    • C. 

      Frequency distortion

    • D. 

      Electromagnetic interference

  • 2. 
    What is not a factor in determining the refractive index of air?
    • A. 

      Atmospheric pressure

    • B. 

      Propagation medium

    • C. 

      Temperature

    • D. 

      Moisture

  • 3. 
    The determining factor in calculating the correct siez of a waveguide is
    • A. 

      Frequency

    • B. 

      Power output

    • C. 

      Bandwidth of the transmission medium

    • D. 

      Distance between equipment and transmitter

  • 4. 
    How many miles above the earth are satellites placed in orbit?
    • A. 

      2,230

    • B. 

      2,320

    • C. 

      22,300

    • D. 

      23,200

  • 5. 
    Which satellite communications system is used to transmit space operations?
    • A. 

      Milstar Communication System

    • B. 

      Defense Satellite Communications System (DSCS)

    • C. 

      Air Force Satellite Communications (AFSATCOM)

    • D. 

      Ground Mobile Forces Satellite Communications (GMFSC)

  • 6. 
    To transmit an audio signal over radio frequency  (RF), it first has to be
    • A. 

      Phase shifted

    • B. 

      Transmitted

    • C. 

      Modulated

    • D. 

      Encoded

  • 7. 
    What is the one path high frequency (HF) transmissions follow from the antenna to the distant end?
    • A. 

      Lightwave

    • B. 

      Microwave

    • C. 

      Soundwave

    • D. 

      Groundwave

  • 8. 
    Which is not a disadvantage of laser light transmission?
    • A. 

      No need for careful alignment of transmitter and receiver

    • B. 

      Cannot penetrate even very thin curtains or paper

    • C. 

      Sensitive to atmospheric interferance

    • D. 

      Strictly line-of-sight (LOS) transmission

  • 9. 
    Broadband refers to a technology that can transmit
    • A. 

      A relatively wide range of frequencies

    • B. 

      Only high frequency information

    • C. 

      A relatively wide range of amplitudes

    • D. 

      Only high amplitude information

  • 10. 
    Broadband technology uses all of these transmission mediums except?
    • A. 

      Telephone lines

    • B. 

      Television cable lines

    • C. 

      Satellite systems

    • D. 

      Laser light

  • 11. 
    The Intergrated Services Digital Network (ISDN) configuration normally used to connect switches together is the
    • A. 

      Basic rate interface (BRI)

    • B. 

      Primary rate interface (PRI)

    • C. 

      Trunk rate interface (TRI)

    • D. 

      Switch rate interface (SRI)

  • 12. 
    How many B and D channels does the standard configuration in North American Integrated Services Digital Network (ISDN) primary rate interface (PRI) application use?
    • A. 

      2, 1

    • B. 

      30, 2

    • C. 

      1, 24

    • D. 

      23, 1

  • 13. 
    What was the primary  driving factor behind the invention of the telephone exchange?
    • A. 

      Point-to-point telephone access caused cabling issues

    • B. 

      The invention of the multi-line telephone

    • C. 

      Military communication requirements

    • D. 

      Radio communication requirements

  • 14. 
    When a telephone network is circuit switched, each call
    • A. 

      Is broadcast over multiple paths between switches

    • B. 

      Is packetized and transmitted in circuitous bursts

    • C. 

      Has a dedicated circuit created by the sqitch

    • D. 

      Requires a dedicated switch to make the connection

  • 15. 
    The three conerstones of voice network system security are availability,
    • A. 

      Circumvention and confidentiality

    • B. 

      Circumvention and disclosure

    • C. 

      Confidentiality and integrity

    • D. 

      Disclosure and integrity

  • 16. 
    What is the most serious threat to voice network system integrity?
    • A. 

      Subversion

    • B. 

      Unauthorized monitoring

    • C. 

      Inexperienced switch technicians

    • D. 

      Inadequate maintenance practices

  • 17. 
    What role does the Private Branch Exchanged (PBX) play in the telphony industry?
    • A. 

      A medium scale switch that handles traffic for a small city

    • B. 

      A very small scale switch that is also known as a key system

    • C. 

      A large scale switch that handles the traffic for a metropolitan area

    • D. 

      A small scale switch that handles internal calls for an organization

  • 18. 
    How many serial data ports does the Meridian Option 11C Small System Controller have?
    • A. 

      32

    • B. 

      12

    • C. 

      3

    • D. 

      1

  • 19. 
    Which models of the digital multiplex system (DMS) family are commonly used at Air Force bases to provide base telephone services?
    • A. 

      DMS-100 and Meridian System Logic (MSL)-100

    • B. 

      DMS-100/200 and MSL-100

    • C. 

      DMS-100/200 and DMS-200

    • D. 

      DMS-200 and MSL-100

  • 20. 
    What is the maximum number of ports that a digital multiplex system-100 (DMS-100) supports?
    • A. 

      10,000

    • B. 

      30,000

    • C. 

      100,000

    • D. 

      300,000

  • 21. 
    Which elements make up the control component of the SuperNode central control?
    • A. 

      Computing mode (CM) and message switches (MS)

    • B. 

      CM and system load module (SLM)

    • C. 

      Central processing unit (CPU) and control monitor unit (CMU)

    • D. 

      CPU, digital signal (DS) and peripheral module (PM)

  • 22. 
    What link is used to connect the digital multiplex system (DMS)-core to the DMS-bus?
    • A. 

      DS-1

    • B. 

      DS-30

    • C. 

      DS-30A

    • D. 

      DS-512

  • 23. 
    Which major component of the NorTel digital switching system (DSS) interface line and trunk subscribers?
    • A. 

      Central control

    • B. 

      Input/output (I/O)

    • C. 

      Peripheral module

    • D. 

      Peripheral subsystem (PS)

  • 24. 
    What components are directly connected to the input/output controller (IOC)?
    • A. 

      Printers, visual display unit (VDU) and tape drives

    • B. 

      A pair of SuperNode message controllers and the device controllers

    • C. 

      A maintenance and administration position (MAP)

    • D. 

      The central processing unit (CPU) and keyboad

  • 25. 
    Base cables normally enter the central office (CO) facility through a
    • A. 

      Cable manhole

    • B. 

      Telecommunications cable closet

    • C. 

      Building cable raceway

    • D. 

      Cable vault