Army Electrical Explosives Safety
(Ammo-28)/AMMUNITION AND
EXPLOSIVES STORAGE SAFETY
(CERT) (AMMO 112) Exam
QUESTIONS WITH COMPLETE
SOLUTIONS | VERIFIED
/. 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
/.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
/.Which types of information does an LPS record provide? Select all that apply. -
Answer-Test locations
Test item descriptions or listing
Type of test
Responsibilities for conducting and administering the test plan
(Ammo-28)/AMMUNITION AND
EXPLOSIVES STORAGE SAFETY
(CERT) (AMMO 112) Exam
QUESTIONS WITH COMPLETE
SOLUTIONS | VERIFIED
/. 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
/.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
/.Which types of information does an LPS record provide? Select all that apply. -
Answer-Test locations
Test item descriptions or listing
Type of test
Responsibilities for conducting and administering the test plan
