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Army Electrical Explosive Safety Questions
and Correct Answers
Which four statements are characteristics of lightning?
Ans: 1. Lightning heats the air to 50,000F.
2. Most lightning never reaches the ground.
3. Lightning carries about 30,000 amps of current.
4. Lightning is about 1'' thick.
Which of the following statements about lightning is false?
Ans: All lightning strikes the ground.
Place the steps of lightning formation in the correct order.
Ans: 1. Charge form in a cloud.
2. A stepped leader extends down from the cloud.
3. An upward streamer extends up from the ground.
4. The stepped leader and upward streamer connect and
current flows from the cloud to the ground.
The goal of lightning protection is to Ans: Provide a non-
destructive, low resistance path to ground.
Select all the ways lightning can cause damage. Ans: 1.
Spalling
2. Heat or fire
3. Electromagnetic radiation
4. Current
Which three regulatory publications are used for Army
explosives facilities? Ans: 1. DESR 6055.09
© 2025 All rights reserved
, 2 | Page
2. DA PAM 385-64
3. NFPA 780
If a paragraph in NFPA 780 is labeled with an asterisk,
where would you look to find additional explanatory
information? Ans: NFPA 780, Annex A
What is primary principle of lightning protection? Ans: To
protect life and property by providing a non-destructive,
low resistance path to ground.
Put the LPS components in the order in which the current
flows after a lightning strike. Ans: 1. Strike Termination
Device
2. Down Conductor
3. Grounding System
Select the LPS system(s) that require each feature. Ans:
Mast System
1. Wooden or metal mast
2. Strike termination device on mast
3. Grounding system
Catenary System
1. Wooden or metal mast
2. Strike termination device on mast
3. Wire connecting masts
4. Grounding system
Integral System
1. Air terminals mounted to the building.
© 2025 All rights reserved
Army Electrical Explosive Safety Questions
and Correct Answers
Which four statements are characteristics of lightning?
Ans: 1. Lightning heats the air to 50,000F.
2. Most lightning never reaches the ground.
3. Lightning carries about 30,000 amps of current.
4. Lightning is about 1'' thick.
Which of the following statements about lightning is false?
Ans: All lightning strikes the ground.
Place the steps of lightning formation in the correct order.
Ans: 1. Charge form in a cloud.
2. A stepped leader extends down from the cloud.
3. An upward streamer extends up from the ground.
4. The stepped leader and upward streamer connect and
current flows from the cloud to the ground.
The goal of lightning protection is to Ans: Provide a non-
destructive, low resistance path to ground.
Select all the ways lightning can cause damage. Ans: 1.
Spalling
2. Heat or fire
3. Electromagnetic radiation
4. Current
Which three regulatory publications are used for Army
explosives facilities? Ans: 1. DESR 6055.09
© 2025 All rights reserved
, 2 | Page
2. DA PAM 385-64
3. NFPA 780
If a paragraph in NFPA 780 is labeled with an asterisk,
where would you look to find additional explanatory
information? Ans: NFPA 780, Annex A
What is primary principle of lightning protection? Ans: To
protect life and property by providing a non-destructive,
low resistance path to ground.
Put the LPS components in the order in which the current
flows after a lightning strike. Ans: 1. Strike Termination
Device
2. Down Conductor
3. Grounding System
Select the LPS system(s) that require each feature. Ans:
Mast System
1. Wooden or metal mast
2. Strike termination device on mast
3. Grounding system
Catenary System
1. Wooden or metal mast
2. Strike termination device on mast
3. Wire connecting masts
4. Grounding system
Integral System
1. Air terminals mounted to the building.
© 2025 All rights reserved
