ARMY ELECTRICAL EXPLOSIVES SAFETY
(Ammo 28) 2025-2026 ACTUAL EXAM
QUESTIONS WITH CORRECT DETAILED
ANSWERS || ALREADY GRADED A+
<LATEST VERSION>
1. 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
2. Which LPS uses air terminals and conductors mounted directly to the
structure? - ANSWER ✔ Integral
3. 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
4. Which of the following is NOT a requirement for air terminals? -
ANSWER ✔ Air Terminals must be at least 6 feet tall.
5. During the inspection, John's team logged a discrepancy for this air
terminal. Why? - ANSWER ✔ The air terminal is not attached to a
conductor.
6. How many down conductors are required for a building with a perimeter
length of 325 feet? - ANSWER ✔ 4
7. 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.
8. 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
9. What is the maximum allowable resistance reading for a 3-point fall-of-
potential earth resistance test? - ANSWER ✔ 25 ohms or less
10.How often is a bonding resistance test required on an LPS? - ANSWER ✔
Every 24 months
11.What is the maximum allowable reading for a bonding resistance test on an
LPS conductor? - ANSWER ✔ 1 ohm or less
12.When conducting a bonding resistance test on an integral LPS with 10 air
terminals and two down conductors, how many individual resistance tests
are required, at a minimum? - ANSWER ✔ 20
13.While conducting a bonding resistance test on the integral LPS below, you
placed test leads on ground rod S and air terminal N. Which three bonds
listed below are NOT being tested? - ANSWER ✔ B
H
P
14.What information should be in a destructive weather plan? Select all that
apply. - ANSWER ✔ Which operations to shut down
15.Who is responsible for shutting down each operation
16.Steps for shutting down each operation
17.Instructions for evacuating personnel
18.Instructions for restarting each operation
19.Spheric - ANSWER ✔ Detects lightning strike
, 20.Alerts when lightning is nearby
21.Pre-strike - ANSWER ✔ Measure the strength of atmospheric electric
fields
22.Alerts when lightning strikes are imminent
23.What is the primary danger in a hazardous classified location? - ANSWER
✔ Explosive atmosphere
24.Which division describes a hazardous classified location with greatest
probability of ignition or explosion? - ANSWER ✔ Division 1
25.Which two agencies tests and certify explosion-proof electrical equipment?
- ANSWER ✔ Army Ordnance Safety and Security Activity (AOSSA)
26.Factory Mutual (FM)
27.Underwriter's Laboratory (UL)
28.Which LPS type is used to protect a large, open area? - ANSWER ✔
Catenary system
29.What is the zone of protection? - ANSWER ✔ The area protected by a
lightening protection system (LPS)
30.According to the rolling sphere method, the building in the image is within
the zone of protection. - ANSWER ✔ True
31.Match each variable to what it represents. - ANSWER ✔ h1 - Height of
mast
h2 - Height of protected object
R - Radius of rolling sphere
d - Protected distance
32.Which device does NOT emit electromagnetic radiation? - ANSWER ✔
Calculator
(Ammo 28) 2025-2026 ACTUAL EXAM
QUESTIONS WITH CORRECT DETAILED
ANSWERS || ALREADY GRADED A+
<LATEST VERSION>
1. 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
2. Which LPS uses air terminals and conductors mounted directly to the
structure? - ANSWER ✔ Integral
3. 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
4. Which of the following is NOT a requirement for air terminals? -
ANSWER ✔ Air Terminals must be at least 6 feet tall.
5. During the inspection, John's team logged a discrepancy for this air
terminal. Why? - ANSWER ✔ The air terminal is not attached to a
conductor.
6. How many down conductors are required for a building with a perimeter
length of 325 feet? - ANSWER ✔ 4
7. 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.
8. 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
9. What is the maximum allowable resistance reading for a 3-point fall-of-
potential earth resistance test? - ANSWER ✔ 25 ohms or less
10.How often is a bonding resistance test required on an LPS? - ANSWER ✔
Every 24 months
11.What is the maximum allowable reading for a bonding resistance test on an
LPS conductor? - ANSWER ✔ 1 ohm or less
12.When conducting a bonding resistance test on an integral LPS with 10 air
terminals and two down conductors, how many individual resistance tests
are required, at a minimum? - ANSWER ✔ 20
13.While conducting a bonding resistance test on the integral LPS below, you
placed test leads on ground rod S and air terminal N. Which three bonds
listed below are NOT being tested? - ANSWER ✔ B
H
P
14.What information should be in a destructive weather plan? Select all that
apply. - ANSWER ✔ Which operations to shut down
15.Who is responsible for shutting down each operation
16.Steps for shutting down each operation
17.Instructions for evacuating personnel
18.Instructions for restarting each operation
19.Spheric - ANSWER ✔ Detects lightning strike
, 20.Alerts when lightning is nearby
21.Pre-strike - ANSWER ✔ Measure the strength of atmospheric electric
fields
22.Alerts when lightning strikes are imminent
23.What is the primary danger in a hazardous classified location? - ANSWER
✔ Explosive atmosphere
24.Which division describes a hazardous classified location with greatest
probability of ignition or explosion? - ANSWER ✔ Division 1
25.Which two agencies tests and certify explosion-proof electrical equipment?
- ANSWER ✔ Army Ordnance Safety and Security Activity (AOSSA)
26.Factory Mutual (FM)
27.Underwriter's Laboratory (UL)
28.Which LPS type is used to protect a large, open area? - ANSWER ✔
Catenary system
29.What is the zone of protection? - ANSWER ✔ The area protected by a
lightening protection system (LPS)
30.According to the rolling sphere method, the building in the image is within
the zone of protection. - ANSWER ✔ True
31.Match each variable to what it represents. - ANSWER ✔ h1 - Height of
mast
h2 - Height of protected object
R - Radius of rolling sphere
d - Protected distance
32.Which device does NOT emit electromagnetic radiation? - ANSWER ✔
Calculator
