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What is a class "C" bond?
metallic surfaces bonded by bridging with metallic bond straps
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Minimum width of copper bond straps
3/4 inch wide minimum and .02 inches thick
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What is a class B bond?
metallic surfaces bonded by bolting or crimping
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Minimum diameter of aluminum air terminals
5/8 inches
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DC Resistance in a high frequency network?
shall be less than 1 milliohm .001 ohm
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For EMI control what should the electrical bond resistance be at hull penetration be to the ground?
15 milliohms or less
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Ground conductors that provide a path for power, control, and lightning protection maximum DC resistance?
1 milliohm
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Minimum insulation resistance between conductors for multiconductor cable?
50,000 ohms
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Maximum distance for air terminals less than 24 inches in height?
20 feet
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What signal reference system should a high frequency network use?
Equipotential plane
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All work benches shall have signs posted indicating what?
whether they are electrically safe in accordance with NTSM Chapter 300-H
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Down conductor separation on power and comms systems?
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Types of equipotential planes?
1 copper grid embedded in conductor
2 subfloor of aluminum, copper, phosphor bronze screen
3 ceiling grid above equipment
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Only raised floor type acceptable for an equipotential plane
The bolted grid (stringer) or rigid grid system
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2M ESD strap total resistance
800,000 ohm to 2 Megaohms
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What signal reference system is used on low frequency networks?
Signal point
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How often shall resistance measurements be conducted on an earth electrode subsystem?
every 21 months after the initial 12 month period.
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Minimum diameter of a solid chipper, brass, or bronze air terminal (lightning)
1/2 inch
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Maximum resistance of an earth electrode subsystem?
should not exceed 10 ohms
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What does an "x" symbol represent in EAL?
indicates a grounding/ disabled discrepancy
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What is ALMIS code CFD?
carried forward dept used for items that require work during availability
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For TCTO "UTB-41 TB1003" What does the 3 indicate?
the sixth character of the ACMS code is used to track TCTO revisions.
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System identification for cable tag RT
Radio TX control
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Deployed units assign what priority to cat 2-3 CASREPS?
Priority "P"
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For TCTO "UTB-41 TB1003" what does the 00 indicate?
the 4th and fifth characters contain the sequential number within a category
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What does the letter "C" indicate on a cable tag?
"C" designates interior communications
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What electronic designation is R-EA?
EA- Air search radar
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What system designation is "R-P"?
P- Special purpose
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What does the letter "G" represent on a cable tag?
"G" is the designation for fire control
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Maximum distance of waveguide supports?
not to exceed 5 feet
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Waveguide is normally supplied in what lengths?
10-14 foot sections
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Distance a waveguide support can be placed to a flange?
Supports shall not be installed closer than 6 inches to any flange connection
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Minimum number of supports for each waveguide section?
shall be a minimum of 2 supports for each section that exceeds 24 inches in length
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What is the minimum slug value for MORAD-VHF-159 VSWR test?
Slug needs to be 25w minimum w/ frequency range of 156-163 Mhz
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What should the SINAD reading be on a UHF XTL-5000 TRANSCEIVER?
12 db
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What would you do if resistance readings of a direction finder antenna were incorrect?
Clean antenna if resistance was less than 10 Megaohms and retest. Replace if still less than 10 Megaohms.
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On PG-500 which lights come on to indicate 100 ms mode?
Auto, True, Calib come on
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What depth sounder setting would you use for deep water?
- Low frequency
- 800-1200 feet
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What number will Navy cognizant codes have?
9
(CI 1-3-B-12)
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CG units shall use what advice code to requisition DLR items?
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Obsolete ordnance items condition code?
Hotel
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What fund code is for mast preservation, safety matting, and CG One connections?
AFC-30
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What fund code is for stuffing tubes, cable transits, hull rings, and foundations?
AFC-45
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What cognizant symbol will DOD owned/managed items have?
Identified with the "7" series cognizant symbol.
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Categories of leadership
- Leading self
- Leading others
- Leading performance and change
- Leading Coast Guard
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What is the maximum distance the nearest cable hangers can be to a MCT?
30 inches maximum
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High voltage/ danger signs required on shore equipment?
600v
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When is a "Danger high voltage" sign required?
500 volts
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Typical non rotating PEL for bridge master radar?
non - rotating 35 feet
Rotating n/a
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PEL time for controlled environments?
6 minutes
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HERP standoff fixed beam distance for URN-25 (TACAN)?
4 feet
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Safe distance from UHF/VHF omnidirectional antennas?
20 feet
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