Army Electrical Explosives Safety (Ammo-28) Exam
with 100% Correct Answers 2023.
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
, Army Electrical Explosives Safety (Ammo-28) Exam
with 100% Correct Answers 2023.
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
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.
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