ARMY ELECTRICAL EXPLOSIVES SAFETY (AMMO28) EXAM LATEST 2023-2024 ACTUAL EXAM 135
QUESTIONS AND CORRECT DETAILED ANSWERS
Which two publications provide detailed information on lightning protection systems? - (answer) DA
PAM 385-64
NFPA 780
Which statements about lightning protection are true?Select all that apply. - (answer) Lightning can
detonate munitions and explosives.
Lightning seeks the path of least resistance to ground.
Lightning cannot be stopped or prevented.
Which statement is true about a mast LPS? - (answer) Each mast must have two paths to ground.
A 30-foot tall building is protected by a catenary system. How far from the building should the masts be
placed? - (answer) at least 6 feet
Which LPS uses air terminals and conductors mounted directly to the structure? - (answer) Integral
Why does the wooden mast have an air terminal on top and two down conductors running its entire
length? - (answer) The wooden mast is not electrically conductive
Which of the following is NOT a requirement for air terminals? - (answer) Air Terminals must be at
least 6 feet tall.
During the inspection, John's team logged a discrepancy for this air terminal. Why? - (answer) The air
terminal is not attached to a conductor.
How many down conductors are required for a building with a perimeter length of 325 feet? - (answer)
4
, ARMY ELECTRICAL EXPLOSIVES SAFETY (AMMO28) EXAM LATEST 2023-2024 ACTUAL EXAM 135
QUESTIONS AND CORRECT DETAILED ANSWERS
While conducting an LPS inspection, you see mast down conductors routed as shown in the image
below. Do you write it up as a discrepancy? Why or why not? - (answer) Yes, because mast down
conductors should be 180 degrees apart.
A steel beam, connected to the main LPS at its upper and lower extremities, is used as a down
conductor. At what intervals should it be connected to the grounding system? - (answer) 60 feet or less
Which statement about grounding systems is true? - (answer) The resistance should be 25 ohms or
less.
Which of the following statements regarding bonding are true? Select all that apply. - (answer)
Bonding reduces the threat of sideflash by providing a low impedance path to ground.
Bonding is a way of connecting LPS conductors to grounded metal objects.
When should a grounded metal object be considered for bonding? - (answer) When it's within 6 feet
of a conductor
Which bonding method is the most permanent and secure? - (answer) Exothermic weld
Which factors are used to calculate bonding distance?Select all that apply. - (answer) Height of
proposed bond
Flashover medium
Number of down conductors
While conducting the inspection, John's team noticed a new metal light pole installed 3 feet from the
down conductor at the corner of this building. They logged a discrepancy. Why? - (answer) Because
grounded metal objects within 6 feet of LPS conductors should be bonded to it
QUESTIONS AND CORRECT DETAILED ANSWERS
Which two publications provide detailed information on lightning protection systems? - (answer) DA
PAM 385-64
NFPA 780
Which statements about lightning protection are true?Select all that apply. - (answer) Lightning can
detonate munitions and explosives.
Lightning seeks the path of least resistance to ground.
Lightning cannot be stopped or prevented.
Which statement is true about a mast LPS? - (answer) Each mast must have two paths to ground.
A 30-foot tall building is protected by a catenary system. How far from the building should the masts be
placed? - (answer) at least 6 feet
Which LPS uses air terminals and conductors mounted directly to the structure? - (answer) Integral
Why does the wooden mast have an air terminal on top and two down conductors running its entire
length? - (answer) The wooden mast is not electrically conductive
Which of the following is NOT a requirement for air terminals? - (answer) Air Terminals must be at
least 6 feet tall.
During the inspection, John's team logged a discrepancy for this air terminal. Why? - (answer) The air
terminal is not attached to a conductor.
How many down conductors are required for a building with a perimeter length of 325 feet? - (answer)
4
, ARMY ELECTRICAL EXPLOSIVES SAFETY (AMMO28) EXAM LATEST 2023-2024 ACTUAL EXAM 135
QUESTIONS AND CORRECT DETAILED ANSWERS
While conducting an LPS inspection, you see mast down conductors routed as shown in the image
below. Do you write it up as a discrepancy? Why or why not? - (answer) Yes, because mast down
conductors should be 180 degrees apart.
A steel beam, connected to the main LPS at its upper and lower extremities, is used as a down
conductor. At what intervals should it be connected to the grounding system? - (answer) 60 feet or less
Which statement about grounding systems is true? - (answer) The resistance should be 25 ohms or
less.
Which of the following statements regarding bonding are true? Select all that apply. - (answer)
Bonding reduces the threat of sideflash by providing a low impedance path to ground.
Bonding is a way of connecting LPS conductors to grounded metal objects.
When should a grounded metal object be considered for bonding? - (answer) When it's within 6 feet
of a conductor
Which bonding method is the most permanent and secure? - (answer) Exothermic weld
Which factors are used to calculate bonding distance?Select all that apply. - (answer) Height of
proposed bond
Flashover medium
Number of down conductors
While conducting the inspection, John's team noticed a new metal light pole installed 3 feet from the
down conductor at the corner of this building. They logged a discrepancy. Why? - (answer) Because
grounded metal objects within 6 feet of LPS conductors should be bonded to it
