AMMO 67 EXAM LATEST ACTUAL EXAM 100
QUESTIONS AND CORRECT DETAILED ANSWERS WITH
EXPLANATIONS |AGRADE
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
Which section of DA PAM 385-64 provides LPS visual inspection guidance? -
ANSWER: Appendix D
How often is a visual inspection required on an LPS? - ANSWER: Every 12 months
While conducting the LPS inspection, the team saw these surveillance cameras. Does
this building comply with LPS standards? - ANSWER: No, because the surveillance
cameras are outside the zone of protection.
How long must LPS test results be kept on file? - ANSWER: 6 inspection cycles
QUESTIONS AND CORRECT DETAILED ANSWERS WITH
EXPLANATIONS |AGRADE
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
Which section of DA PAM 385-64 provides LPS visual inspection guidance? -
ANSWER: Appendix D
How often is a visual inspection required on an LPS? - ANSWER: Every 12 months
While conducting the LPS inspection, the team saw these surveillance cameras. Does
this building comply with LPS standards? - ANSWER: No, because the surveillance
cameras are outside the zone of protection.
How long must LPS test results be kept on file? - ANSWER: 6 inspection cycles
