ARMY ELECTRICA EXPLOSIVES
SAFETY COURSE (AMMO 28) EXAM
QUESTIONS UPDATED 2025 A+
Which four statements are characteristics of lightening? - ANSWER- Lightening
heats the air to 50,000F., Most lightening never reaches the ground., Lightening
carries about 30,000 amps of current., Lightening is about 1" thick.
Which of the following statements about lightening is false? - ANSWER- All
lightening strikes the ground.
Place the steps of lightening formation in the correct order. - ANSWER- 1. Change
forms in a cloud
2. A stepped leader extends down from the cloud.
3. An upward stream 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 lightening protection is to - ANSWER- Provide a non-destructive, low
resistance path to the ground.
Select all the wats lightening can cause damage. - ANSWER- Spalling, Heat or
fire, Electromagnetic radiation, Current
, Which three regulatory publications are used for Army explosives facilities? -
ANSWER- DESR 6055.09, DA PAM 385-64, NFPA 780
If a paragraph in NFPA 780 is labeled with an asterisk, where would you look to
find additional explanatory information? - ANSWER- NFPA 780, Annex A
What is the primary principle of lightening protection? - ANSWER- To protect life
and property by providing a non-destructive, low resistance path to the ground
Put the LPS components in the order in which the current flows after a lightening
strike. - ANSWER- 1. Strike determination device
2. Down conductor
3. Grounding system
Which image shows an example of an integral LPS? - ANSWER- The one on the
building
Which image shows an example of a mast LPS? - ANSWER- The one that is just a
pole
Which image shows an example of a catenary LPS? - ANSWER- The one that is a
pole with wires
Select the LPS system(s) that require each feature. - ANSWER- Wooden or metal
mast - Mast system, Catenary System
Air terminals mounted to the building - Catenary System, Integral system
Strike termination device on mast - Mast system, catenary system
Wire connecting masts - catenary system
SAFETY COURSE (AMMO 28) EXAM
QUESTIONS UPDATED 2025 A+
Which four statements are characteristics of lightening? - ANSWER- Lightening
heats the air to 50,000F., Most lightening never reaches the ground., Lightening
carries about 30,000 amps of current., Lightening is about 1" thick.
Which of the following statements about lightening is false? - ANSWER- All
lightening strikes the ground.
Place the steps of lightening formation in the correct order. - ANSWER- 1. Change
forms in a cloud
2. A stepped leader extends down from the cloud.
3. An upward stream 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 lightening protection is to - ANSWER- Provide a non-destructive, low
resistance path to the ground.
Select all the wats lightening can cause damage. - ANSWER- Spalling, Heat or
fire, Electromagnetic radiation, Current
, Which three regulatory publications are used for Army explosives facilities? -
ANSWER- DESR 6055.09, DA PAM 385-64, NFPA 780
If a paragraph in NFPA 780 is labeled with an asterisk, where would you look to
find additional explanatory information? - ANSWER- NFPA 780, Annex A
What is the primary principle of lightening protection? - ANSWER- To protect life
and property by providing a non-destructive, low resistance path to the ground
Put the LPS components in the order in which the current flows after a lightening
strike. - ANSWER- 1. Strike determination device
2. Down conductor
3. Grounding system
Which image shows an example of an integral LPS? - ANSWER- The one on the
building
Which image shows an example of a mast LPS? - ANSWER- The one that is just a
pole
Which image shows an example of a catenary LPS? - ANSWER- The one that is a
pole with wires
Select the LPS system(s) that require each feature. - ANSWER- Wooden or metal
mast - Mast system, Catenary System
Air terminals mounted to the building - Catenary System, Integral system
Strike termination device on mast - Mast system, catenary system
Wire connecting masts - catenary system
