MG81

  1. To determine if a facility is protected against Lightning what manual would you use?
    MIL-STD-188-124B and MIL-HDBK-419 (Volume 1 and 2)
  2. When dealing with lightning protection all antennas must be inside a ___ cone of protection?
    1:1
  3. All down conductors of the lightning
    protection subsystem have bends with a radius less than __ cm (_ inches) or bends
    not less than __°?
    20cm 8inches 90°
  4. Are all metal objects within __ meters (_ ft)
    of the lightning down conductor bonded or
    grounded to the facility ground?
    1.8 meters,  6 ft
  5. Are all bonds between elements of the
    lightning protection subsystem ______,
    ______, or secured by _________ clamps?
    welded, brazed, or secured by UL-approved clamps?
  6. Are two tower legs independently grounded
    to the _________________________?
    earth electrode subsystem
  7. Are the down conductors from the tower
    bonded to the tower at the ____?
    base
  8. What are the three different types of MILSTRIPs in FLS?
    • •  Free issue items that are stocked in NESSS
    • •  Cost items that are stocked in NESSS
    • •  Items that are purchased from other DOD agencies
  9. What fields labeled in blue below (and on the MILSTRIP form) are required entries?
    UI, Status

    Demand Code
  10. In FLS Milstrip with the exception of the ____ ___ ____ field, these can be changed as needed.
    From Svc Code
  11. In the Priority field, enter the priority of the MILSTRIP:
    • ● Priority 02 or 03 for Emergency requisitions.
    • ● Priority 05 or 06 for Mission Impaired requisitions.
    • ● Priority 12 or 13 for Routine requisitions.
  12. If this NIIN is a “Free Issue” NIIN, the Fund Code will be __.
    00
  13. In a milstrip if this a cost NIIN the Fund Code field will be ______.
    blank
  14. If the NIIN is NOT managed in _____, data fields will not be filled in.
    NESSS
  15. Note: The maximum quantity for MTR items is _. If more than one MTR item is needed, create one MILSTRIP per item.
    1
  16. What is a RIC in milstrips?
    Routing Identifier Code
  17. In the Signal Code field, use the LOV to update the signal code:
    Free Issue Item
    _ Ship to the requisitioner, no bill required
    _ Ship to the supplementary address, no bill required
    Cost Item
    _ Ship to the requisitioner, bill the requisitioner
    _ Ship to the supplementary address, bill the requisitioner
    D  M  A  J
  18. The Supplementary Svc Code field defaults to _.
    ●  When an OPFAC is selected in the Supp Addr field, the Supplementary Svc Code field changes to _.
    ●  If the Supp Addr field is not used, the Supplementary Svc Code should remain a _.
    Y   Z   Y
  19. What is the antennas and transmission lines testing Interval for a shore unit?
    Quarterly or as the local environment dictates.
  20. What is the antennas and transmission lines testing Interval for a floating unit?
    Monthly or at the end of each extended period at sea
  21. What is the antennas and transmission lines testing Interval for a Submarine cable?
    Annually.
  22. For a Wave-guide what should be used to test it instead of a megger?
    Use VSWR testing.
  23. For a whip antenna what should be used to test it instead of a megger?
    Refer to technical manual.

    Note: Some whip antennas may contain discrete components or exhibit the characteristics of an electrical short and should not be tested with a megger.
  24. For a Wire antenna what should be used to test it instead of a megger?
    Use a Time Domain Reflectometer (TDR).
  25. For a VHF/UHF antenna what should be used to test it instead of a megger?
    Refer to technical manuals or contact NAVSEA.

    Note: Due to their high operating frequency, the DC resistance of VHF/UHF antennas is near zero, therefore megger testing is impractical and inconclusive.
  26. What should you not use a megger on?
    VHF/UHF antenna, Wave Guide, Wire antenna, and Whip antenna
  27. Use the _____________ Resistance Test Record Card to record the results of megger testing on transmitting and receiving antenna systems and submarine cables. This
    includes antennas, insulators, and
    transmission lines.
    NAVSEA 9210/19
  28. The megger generates high voltage approximately ___ volts DC.
    500
  29. Use the Megger to test antenna and transmission lines separately
    because:
    • •    The voltage developed by the megger can cause circuit damage in equipment left connected
    • •    A true reading of the antenna/transmission line cannot be obtained when equipment is left connected due to the circuit providing a path to ground
  30. Should you use a separate NAVSEA 9210/19 each transmission line or antenna?
    Yes
  31. After testing with a megger maintenance is needed if?
    • •    The Resistance Test Record indicates a pattern  of slowly deteriorating readings or sudden changes
    • •    The reading shows a resistance of 200 megaohms or less

    • Important: A resistance of 5 megaohms or less indicates an
    • immediate and urgent need to correct the problem.
  32. What reading on a megger would require an immediate replacement of the gear that you are testing?
    A resistance of 5 megaohms or less indicates an immediate and urgent need to correct the problem.
  33. The Time Domain Reflectometer (TDR) is capable of sending a pulse
    down a cable and measuring the reflected pulse back. This measurement
    provides:
    • •    The cable’s impedance
    • •    Distance of the cable
    • •    Visual indication of sharp bends, or kinks
    • •    Visual indication of cuts or nicks
    • •    Visual indication of end of the cable
  34. The two types of TDR’s most widely used in the USCG are the:
    •Tektronix Model 1503B

    •Tektronix Model 1502 TDR Cable Tester

    The 1502 is an analog TDR and 1503B is digital.
  35. To complete the tests in the TDR manual you need?
    •    A TDR

    •    The technical or operators manual

    •    A 6-ft length of RG-58 cable to connect to your TDR
  36. Image Upload 1
    Open
  37. Image Upload 2
    Short
  38. Image Upload 3
    Crimped cable
  39. Image Upload 4
    Frayed
  40. Who creates Permissible Exposure Limits (PEL) boundaries?
    Telecommunications and Information Systems Command (TISCOM)
  41. This cause tissue damage that results primarily from the body's inability to cope with or dissipate excessive heat.
  42. This causes Immunological, neurological, and behavioral changes may result from lower levels of RF radiation.
  43. This happens when the distance between two conductors exceed the breakdown voltage of the dielectric
  44. This occurs when RF radiation can induce a current on improperly grounded, or ungrounded conductors, such as metal or wet objects
  45. It limits define the maximum time and intensity of RF fields that an individual can be exposed to without sustaining injury
  46. Who identifies radiation hazards in the unit?
  47. Who published guidelines to be used for evaluating human exposure to RF emissions?
  48. What is the PEL for General Population/Uncontrolled Exposure category?
  49. What happens when a worker is exposed to a power density limit 3 times higher than the limit?
  50. What is a boundary that physically marks an area as a radiation hazard zone?
  51. Where are RADHAZ warning signs placed?
  52. Who has the chief responsibility to ensure the safety and health of all personnel under his/her command?
    The CO
  53. Who is responsible for ensuring that all new reporting personnel receive safety and familiarization training before engaging in the operation, repair, and maintenance?
  54. * indicates what in a NMEA sentence?
  55. Slice is missing from SPS/50 radar image?
  56. PG 500 LEDs illuminate after calibration?
  57. OPS multi cable tag numbers start how?
    O-001-01
  58. Engineering cable tags start how?
    E-001
  59. All CASREPs underway are designated at least what?
  60. CASUP required when?
  61. DF sensitivity requirements?
  62. DF antenna elements resistance
Author
CDMT
ID
338856
Card Set
MG81
Description
gs2000
Updated