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  1. What order requires CG to maintain safety and occupational health program IAW OSHA for civilians?
    Executive order 12196
  2. What is the base material for a radhaz sign?
    .004 in thick white vinyl
  3. What is the size requirements of radhaz signs for ships?
    5in square
  4. What is the size requirments of radhaz signs for land units?
    12 in square
  5. What is a type 1 radhaz sign?
    Warn personnel of PEL
  6. What is a type 2 radhaz sign?
    Restrict personnel unless they comply with radhaz safety procedures.
  7. What is a type 3 radhaz sign?
    Warn personnel of RF burn hazards.
  8. What is a type 4 radhaz sign?
    Warn personnel of HERF
  9. What is a type 5 radhaz sign?
    Below deck to advise operators of specific safety precautions.
  10. What is a type 6 radhaz sign?
    Warn personnel to no operate transmitters, cells, wireless comms
  11. What is a type 7 radhaz sign?
    Warn personnel of HERO
  12. What is a type 8 radhaz sign?
    Advise operators to refer to hero emission control plan before operating transmitters
  13. Requirement to place CPR sign in all work areas has been established by?
    Offices of health services (CG-112)
  14. What voltage level requires a danger high voltage sign?
  15. On a ship what can be used to warn personnel in place of a radhaz sign?
    4 in wide red painted line
  16. What is the average exposure time limit for occupational population/controlled exposure?
    6 minutes
  17. what is the average exposure time limit for general population/ uncontrolled exposure?
    30 mins
  18. What is the PEL for DGPS broadcast site?
    25 feet
  19. What is the frequency range for DGPS?
  20. What is the frequency range for Loran?
  21. What is the purpose for PEL?
    Warn personnel of limits for general population MPE around a broadcasting antenna
  22. What is the purpose for MPE?
    Let personnel know of how long they can work in or near radiation field w/o sustaining injury
  23. What organs are most susceptible to higher frequency ranges?
    Eyes and testes
  24. What is the startle effect?
    A reflexive action from obtaining a shock resulting with further physical harm
  25. How is a power source defined?
    Any power source above 12 vdc
  26. What type of sign advises operators to familiarize with HERO control plan before operating transmitters?
    Type 8
  27. What equipment should you not use a megger on?
    VHF/UHF, waveguide, whip antenna, wire antenna
  28. What resistance readings for transmission lines/antennas require maintenance?
    200Mohms or less, slow degradation over time
  29. What resistance level requires urgent action to correct transmission line/antenna problem?
  30. What material are cable tags made out of ?
    Soft aluminum
  31. How do you determine which cable to trace?
    Identification of tags on both sides of space
  32. What does the first letter on the cable tag represent?
    Identical system marker
  33. What does the letter R as the second character on a cable tag represent?
    States cable is for electronic equipment
  34. If the second letter on a cable tag is an A, what does this mean?
    Cable is active
  35. An ES to begin the second set of characters after the hyphen represents what?
    Surface search radar
  36. What is the length and diameter of a typical grounding rod?
    10ft by ¾ in
  37. What should down conductors be made of?
    Aluminum, copper, copper clad steel
  38. The metal framework of an earth electrode subsystem should have a resistance of less the ____ ohms?
  39. What class of bonding is welding?
    Class A
  40. DC resistance across bonding and grounding junctions shall not exceed how many ohms?
    .1 ohms
  41. What size should the grounding cable for lightning protection be?
    0000 AWG
  42. What is advantage to using a floating ground subsystem?
    Noise reduction in signal circuits
  43. A single point ground configuration is recommended for use in what frequency range?
    LF, up to 300khz
  44. What does MCT stand for?
    Multi-cable transit
  45. What are two types of MCT’s?
    Nelson firestop and roxtec
  46. What are two types heliax cables?
    Waveguide and coaxial
  47. Who manufactures heliax products?
    Andrews Corporation
  48. What are two types of stuffing tubes?
    Metal and nylon
  49. When are the Facility ground systems inspected and site surveys conducted?
    After major changes to the facility, structure or equipment are made, At least annually inspected.
  50. What components make up the facility ground system?
    Fault protection subsystem, Signal reference ground system, Earth electrode subsystem or shipboard ground plane
  51. What are the primary functions of a facility ground system?
    • 1. Personnel safety
    • 2. Equipment and facility protection
    • 3. Electrical noise reduction
  52. What is a Class C bond?
    Bridging using a metallic (conductive) strap
  53. What is a Class A bond?
    Joining two metallic surfaces by welding or brazing
  54. What is a Class B bond?
    A bond established by bolting or clamping two metallic surfaces together
  55. What must the DC resistance be across the bond surface using a Class C bond?
    less than 0.1 ohms
  56. What class of bonding should be used for electrical or electronic systems requiring permanent bonds?
    Class A
  57. What is a type 1 Class C bond?
    A corrosion-resistant copper/nickel alloy assembly
  58. What is a type 2 Class C bond?
    Flat CRES 316 with mounting holes in each end
  59. What is a type 3 Class C bond?
    Flat copper with mounting holes in each end
  60. What is a type 4 Class C bond?
    Flat copper braid with mounting holes in each end
  61. What is a type 5 Class C bond?
    TRFX-84 cable with mounting lugs and hardware to suit individual install
  62. Which fault protection subsystem incorporates grounding conductors (green wires) that are built into the electrical system?
    Fault Protection
  63. Which facility ground subsystem uses a network of interconnecting rods, wires, pipes, or other configurations of metals?
    Earth electrode
  64. What is the minimum length and diameter for a copper-clad steel ground rod for an Earth Electrode Subsystem?
    10 feet long and 3/4" inch diameter
  65. What are examples of lightning protection devices?
    Air terminals, Down conductors, Ground rods
  66. What is the proper bend radius of a down conductor?
    No less than 8 inches
  67. What is the recommended size of a down conductor?
    6 AWG copper wire
  68. The angle of any bend in a down conductor should be no less than how many degrees?
  69. What is the minimum length and diameter for a ground rod used in lightning protection?
    8 feet long and 1/2 inch diameter
  70. RF impedance across bonding and grounding junctions shall not exceed what on a shipboard grounding plane?
    25 ohms at 30MHz
  71. What type and size cable interconnect earth electrode subsystem grounding rods?
    1/0 AWG or larger bare copper cable
  72. At what distance must a structure be in order to require a separate earth electrode subsystem?
    20 feet
  73. What method is used to determine the resistance of the earth electrode subsystem?
    Fall of potential method
  74. Fault protection conductors should be physically separate from signal reference ground conductors except?
    Where they connect to the earth electrode subsystem
  75. What are examples of fault protection devices?
    • 1. Fuses
    • 2. GFCI's
    • 3. Circuit Breaker
  76. A small deformation at the tip of a lightning rod is an example of what type of lightning effect?
    Thermal effect
  77. Insulation breakdown and component and device failure are an example of what type of lightning effect?
    Electrical effect
  78. Where can you find the basic requirements for personnel protection from a lightning strike to a structure?
    NFPA No. 780
  79. If a building has a pitched roof, then an air terminal should be placed within how many feet of the ends?
    2 feet
  80. On down conductors more than 75 feet, the maximum dc resistance shall not be greater than what?
    0.088 ohms per 1000 feet
  81. How often should a visual inspection be done to the lightning protection subsystem?
  82. The tip of the air terminal must be a minimum of ___________ inches above the structure?
  83. Metal objects within sex feet of lightning down conductors should be bonded to the down conductors in order to avoid ______________.
  84. What ground configuration is preffered for signal ground subsystems for communications electronics (C-E) facilities?
    Multi-point (or equipotential) ground configuration
  85. Which type of equipotential ground plane must be installed during new construction of a facility?
    Concrete floor with embedded copper grids
  86. In a single-point ground system, how many paths are there for the signal reference to ground?
  87. When inspecting low frequency equipment, what should the resistance be when measuring between the signal ground terminal and the equipment case?
    Greater than 1 megohm
  88. When inspecting fault protection subsystems, what should the resistance be when measuring between the green safety wire and the equipment case?
    .1 ohm or less
  89. Electronic and telecommunications equipment are effectively grounded through _______?
    • 1. Capacitive coupling
    • 2. Accidental contact
    • 3. Intentional connection
  90. For down conductors less than 75 feet in length what is the maximum dc resistance allowed?
    0.176 ohms per 1000 feet
  91. ________ from buried electrodes entering buildings often serve as the principal ground point for connections to equipment ground systems.
  92. For metallic and non-metallic hull ships, all Class ____ extensions to the ship's ground potential shall be designated as the ship's ground plane.
    Class A bond
  93. To reduce the possibility of ___________ effects, cables that terminate electronic devices (such as power, signal, and control lines) should not be run in parallel to down.
    Induced voltage
  94. Due to __________ effects, all elements of the lightning protection subsystem must be securely fastened.
  95. Field changes are issued by __________.
    • 1. CG-643
    • 2. SMEF
  96. Which type of field change furnishes documentation, parts, and special tools required to complete a change.
    Type 1
  97. Which type of field change furnishes documentation only?
    Type 2
  98. Which type of field change furnishes documentation and some of the required parts or special tools?
    Type 3
  99. Which type of field change implements changes to technical documentation only and requires no alteration to the equipment?
    Type 4
  100. What / Who is the authority for the installation of a field change?
    Field change bulletin
Card Set:
2016-10-30 02:59:53

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