Army Electrical Explosive Safety ALREADY
PASSED
Which four statements are characteristics of lightning? - =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? - =All lightning strikes the ground.
Place the steps of lightning formation in the correct order. - =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 - =Provide a non-destructive, low resistance path to ground.
Select all the ways lightning can cause damage. - =1. Spalling
2. Heat or fire
3. Electromagnetic radiation
4. Current
Which three regulatory publications are used for Army explosives facilities? - =1. DESR
6055.09
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? - =NFPA 780, Annex A
What is primary principle of lightning protection? - =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. - =1.
Strike Termination Device
2. Down Conductor
3. Grounding System
Select the LPS system(s) that require each feature. - =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.
2. Grounding system
Which LPS type us used to protect a large, open area? - =Catenary system
What is the zone of protection? - =The area protected by a lighting protection system.
According to the rolling sphere method, the building in the image is within the zone of
protection. - =True
PASSED
Which four statements are characteristics of lightning? - =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? - =All lightning strikes the ground.
Place the steps of lightning formation in the correct order. - =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 - =Provide a non-destructive, low resistance path to ground.
Select all the ways lightning can cause damage. - =1. Spalling
2. Heat or fire
3. Electromagnetic radiation
4. Current
Which three regulatory publications are used for Army explosives facilities? - =1. DESR
6055.09
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? - =NFPA 780, Annex A
What is primary principle of lightning protection? - =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. - =1.
Strike Termination Device
2. Down Conductor
3. Grounding System
Select the LPS system(s) that require each feature. - =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.
2. Grounding system
Which LPS type us used to protect a large, open area? - =Catenary system
What is the zone of protection? - =The area protected by a lighting protection system.
According to the rolling sphere method, the building in the image is within the zone of
protection. - =True
