Ammo-28-DL: Electrical
Explosives Safety for Army
Facilities, Ammo-47-DL:
Lightning Protection for Air
Force Facilities2023-2024
Which statement regarding lightning protection is false? - Answerslightning protection system
prevents lightning strikes from occurring.
How many down conductors are required for a mast LPS? - Answers2
Which material is preferred for ground conductors? - AnswersCopper
What does n represent in the Basic Bonding Formula? - AnswersNumber of down conductors
What does Km represent in the Basic Bonding Formula? - Answersflashover medium
During an LPS inspection you notice a grounded metal pipe 3 feet from a conductor. Should you
write it up as a possible discrepancy? - AnswersYes. Grounded metal objects within 6 feet of a
conductor should be considered for bonding
What does D represent in the Basic Bonding Formula? - AnswersBonding distance
, Which bonding condition applies to isolated metal objects surrounded by non-conductive material
(such as a metal door frame in a concrete wall)? - AnswersWRONG Condition 2
Calculate the BBF to determine if bonding is required for the scenario below. Use a calculator, the
BBF equation aid, and the bonding job aid as required.
• The metal vent is 15 feet high.
• There are 2 down conductors at the proper spacing.
• The vent is 12 inches (1 foot) from a conductor through air. - AnswersBonding distance for the
metal roof vent is 1 foot 8 inches. Bonding is required.
LPS test results must be kept on file for - Answers6 inspection cycles
An LPS visual inspection is required every - Answers12 months
Conductive floors in explosives facilities must be tested every - AnswersWRONG 6 months
At a minimum, how many individual resistance tests must be performed on this conductive floor?
Refer to DA PAM 385-64, Section C-3 as required. - AnswersTen tests: five electrode-to-electrode
and five electrode-to-ground tests
An LPS requires three-point fall-of-potential earth resistance testing every - AnswersEvery 24
months
When conducting a 3-point fall-of-potential earth resistance test, what is the maximum allowable
resistance reading? - Answers25 ohms
When conducting a bonding resistance test, what is the maximum allowable reading? - Answers1
ohm
How many individual bonding resistance tests are required on an integral LPS with 12 air terminals
and 2 down conductors? - Answers24
Explosives Safety for Army
Facilities, Ammo-47-DL:
Lightning Protection for Air
Force Facilities2023-2024
Which statement regarding lightning protection is false? - Answerslightning protection system
prevents lightning strikes from occurring.
How many down conductors are required for a mast LPS? - Answers2
Which material is preferred for ground conductors? - AnswersCopper
What does n represent in the Basic Bonding Formula? - AnswersNumber of down conductors
What does Km represent in the Basic Bonding Formula? - Answersflashover medium
During an LPS inspection you notice a grounded metal pipe 3 feet from a conductor. Should you
write it up as a possible discrepancy? - AnswersYes. Grounded metal objects within 6 feet of a
conductor should be considered for bonding
What does D represent in the Basic Bonding Formula? - AnswersBonding distance
, Which bonding condition applies to isolated metal objects surrounded by non-conductive material
(such as a metal door frame in a concrete wall)? - AnswersWRONG Condition 2
Calculate the BBF to determine if bonding is required for the scenario below. Use a calculator, the
BBF equation aid, and the bonding job aid as required.
• The metal vent is 15 feet high.
• There are 2 down conductors at the proper spacing.
• The vent is 12 inches (1 foot) from a conductor through air. - AnswersBonding distance for the
metal roof vent is 1 foot 8 inches. Bonding is required.
LPS test results must be kept on file for - Answers6 inspection cycles
An LPS visual inspection is required every - Answers12 months
Conductive floors in explosives facilities must be tested every - AnswersWRONG 6 months
At a minimum, how many individual resistance tests must be performed on this conductive floor?
Refer to DA PAM 385-64, Section C-3 as required. - AnswersTen tests: five electrode-to-electrode
and five electrode-to-ground tests
An LPS requires three-point fall-of-potential earth resistance testing every - AnswersEvery 24
months
When conducting a 3-point fall-of-potential earth resistance test, what is the maximum allowable
resistance reading? - Answers25 ohms
When conducting a bonding resistance test, what is the maximum allowable reading? - Answers1
ohm
How many individual bonding resistance tests are required on an integral LPS with 12 air terminals
and 2 down conductors? - Answers24
