for Army Facilities, Ammo-47-DL:
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Lightning Protection for Air Force |\ |\ |\ |\ |\
Facilities – QUESTIONS WITH ANSWERS |\ |\ |\ |\
Which statement regarding lightning protection is false? -
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CORRECT ANSWERS ✔✔lightning protection system prevents
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lightning strikes from occurring.
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How many down conductors are required for a mast LPS? -
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CORRECT ANSWERS ✔✔2 |\ |\
Which material is preferred for ground conductors? - CORRECT
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ANSWERS ✔✔Copper |\
What does n represent in the Basic Bonding Formula? - CORRECT
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ANSWERS ✔✔Number of down conductors |\ |\ |\ |\
What does Km represent in the Basic Bonding Formula? -
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CORRECT ANSWERS ✔✔flashover medium |\ |\ |\
During an LPS inspection you notice a grounded metal pipe 3 feet
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from a conductor. Should you write it up as a possible
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discrepancy? - CORRECT ANSWERS ✔✔Yes. Grounded metal
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objects within 6 feet of a conductor should be considered for
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bonding
, What does D represent in the Basic Bonding Formula? - CORRECT
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ANSWERS ✔✔Bonding distance
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Which bonding condition applies to isolated metal objects
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surrounded by non-conductive material (such as a metal door |\ |\ |\ |\ |\ |\ |\ |\ |\
frame in a concrete wall)? - CORRECT ANSWERS ✔✔WRONG
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Condition 2 |\
Calculate the BBF to determine if bonding is required for the |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
scenario below. Use a calculator, the BBF equation aid, and the
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bonding job aid as required. |\ |\ |\ |\
• The metal vent is 15 feet high.
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• There are 2 down conductors at the proper spacing.
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• The vent is 12 inches (1 foot) from a conductor through air. -
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CORRECT ANSWERS ✔✔Bonding distance for the metal roof vent |\ |\ |\ |\ |\ |\ |\ |\ |\
is 1 foot 8 inches. Bonding is required.
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LPS test results must be kept on file for - CORRECT ANSWERS
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✔✔6 inspection cycles |\ |\
An LPS visual inspection is required every - CORRECT ANSWERS
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✔✔12 months |\
Conductive floors in explosives facilities must be tested every - |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
CORRECT ANSWERS ✔✔WRONG 6 months |\ |\ |\ |\
At a minimum, how many individual resistance tests must be
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performed on this conductive floor? Refer to DA PAM 385-64, |\ |\ |\ |\ |\ |\ |\ |\ |\ |\