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Army Electrical Explosive Safety Latest Exam 2025-2026 With Verified Answers, Exams of Military leadership

Virginia Military Institute (VMI)Military leadership

Which four statements are characteristics of lightning? - correct answer>>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? - correct answer>>All lightning strikes the ground. Place the steps of lightning formation in the correct order. - correct answer>>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 - correct answer>>Provide a non-destructive, low resistance path to ground.

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Army Electrical Explosive Safety Latest Exam
2025-2026 With Verified Answers
Which four statements are characteristics of lightning? - correct answer>>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? - correct answer>>All
lightning strikes the ground.
Place the steps of lightning formation in the correct order. - correct answer>>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 - correct answer>>Provide a non-destructive, low
resistance path to ground.
Select all the ways lightning can cause damage. - correct answer>>1. Spalling
2. Heat or fire
3. Electromagnetic radiation
4. Current
Which three regulatory publications are used for Army explosives facilities? - correct
answer>>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? - correct answer>>NFPA 780, Annex A
What is primary principle of lightning protection? - correct answer>>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. -
correct answer>>1. Strike Termination Device
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Download Army Electrical Explosive Safety Latest Exam 2025-2026 With Verified Answers and more Exams Military leadership in PDF only on Docsity!

Army Electrical Explosive Safety Latest Exam

2025 - 2026 With Verified Answers

Which four statements are characteristics of lightning? - correct answer>>1. Lightning heats the air to 50,000F.

  1. Most lightning never reaches the ground.
  2. Lightning carries about 30,000 amps of current.
  3. Lightning is about 1'' thick. Which of the following statements about lightning is false? - correct answer>>All lightning strikes the ground. Place the steps of lightning formation in the correct order. - correct answer>>1. Charge form in a cloud.
  4. A stepped leader extends down from the cloud.
  5. An upward streamer extends up from the ground.
  6. The stepped leader and upward streamer connect and current flows from the cloud to the ground. The goal of lightning protection is to - correct answer>>Provide a non-destructive, low resistance path to ground. Select all the ways lightning can cause damage. - correct answer>>1. Spalling
  7. Heat or fire
  8. Electromagnetic radiation
  9. Current Which three regulatory publications are used for Army explosives facilities? - correct answer>>1. DESR 6055.
  10. DA PAM 385- 64
  11. NFPA 780 If a paragraph in NFPA 780 is labeled with an asterisk, where would you look to find additional explanatory information? - correct answer>>NFPA 780, Annex A What is primary principle of lightning protection? - correct answer>>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. - correct answer>>1. Strike Termination Device
  1. Down Conductor
  2. Grounding System Select the LPS system(s) that require each feature. - correct answer>>Mast System
  3. Wooden or metal mast
  4. Strike termination device on mast
  5. Grounding system Catenary System
  6. Wooden or metal mast
  7. Strike termination device on mast
  8. Wire connecting masts
  9. Grounding system Integral System
  10. Air terminals mounted to the building.
  11. Grounding system Which LPS type us used to protect a large, open area? - correct answer>>Catenary system What is the zone of protection? - correct answer>>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. - correct answer>>True Zone of Protection Variables - correct answer>>D= Protected distance H1= Height of the mast R2= Radius of the rolling sphere H2= Heigh of the object being protected Using the image below, identify the value of h1. - correct answer>>85 feet Using the image below, identify the value of h2. - correct answer>>32 feet Using the image below, identify the value of R. - correct answer>>100 feet Identify h1, h2, and R in the this image. - correct answer>>h1= 10 feet h2= 24 feet R= 100 feet

When conducting an inspecting, you see what is shown in the image. Do you report it? - correct answer>>No, because the guy wire can act as the second down conductor. How many down conductors are required for building with perimeter of 430 feet? - correct answer>> 5 How many down conductors are required for building with perimeter of 210 feet? - correct answer>> 2 Which three are requirements for conductors? - correct answer>>1. They interconnect all air terminals

  1. They may have only one rising path under 50 feet on a pitched roof.
  2. They may have only one rising path at less than 1/4 slope on a gently sloping roof. What is the maximum length a cross-run without connection to the roof conductor? - correct answer>>150 feet If you were inspecting this mast, would you report a defect? - correct answer>>Yes, the down conductors are supposed to be protected. What is the preferred method of connection conductors? - correct answer>>Exothermic weld Which two statements about bonding are true? - correct answer>>1. Bounding electrically connects a metal object to an LPS.
  3. Bounding reduces the risk sideflash. Which bonding method is the most secure? - correct answer>>Welding Which condition is most common for AE facilities? - correct answer>>Condition 2a Which object is always required to be bonded? - correct answer>>A railroad track 4 feet from an LPS conductor What condition applies to a 2-foot-long grounded metal object on a 15-foot-tall structure? - correct answer>>Condition 2a Basic Bonding Formula - correct answer>>D= Calculated bounding distance H= Height of the structure or the proposed bond Km= Value related to the flashover medium (air or solid material)

N= Value related to the number of down conductors A grounded metal object has been added to a structure 25 feet tall. What is the bonding distance and is bonding required? - correct answer>>The bonding distance is 1 foot, and the object does not need to be bonded. A grounded metal object has been added to a structure 90 feet tall, as shown in the image. What is the bounding distance and is bounding required? - correct answer>>The bounding distance is 3 inches, and the object does not need to be bonded. The calculated bounding distance for this object is 2 feet 6 inches. Does the window require bounding? - correct answer>>No, because A+B is greater than the bounding distance. Which two earth electrode systems are Army-approved for use in new and renovated structures? - correct answer>>1. Ground loop

  1. Ground rods How do you determine the spacing requirement when using multiple ground rods? - correct answer>>Add the driven depths of both rods. Which four methods can be use to connect a down conductor to a ground rod? - correct answer>>1. Brazing
  2. Bolting
  3. High-compression crimping
  4. Exothermic welding What is the minimum distance between ground rods and the structure foundation? - correct answer>>3 feet How long should test records be kept? - correct answer>>6 inspection cycles How often must lightning protection systems undergo visual inspection? - correct answer>>Every 12 months How often must conductive floors undergo visual inspection? - correct answer>>Every 6 months Which of the three following are deficiencies during an LPS visual inspection? - correct answer>>1. Painted bond between air terminal and conductor

Which class is associated with locations where combustible dust may be in the air? - correct answer>>Class II Which class is associated with locations where ignitable fibers may be in the air? - correct answer>>Class III Which class is associated with locations where flammable gases or vapors may be in the air? - correct answer>>Class I Select the correct class for each item. - correct answer>>Class I

  1. Gasoline
  2. Acetylene Class II
  3. Sawdust
  4. Coal dust Class III
  5. Rayon fibers Which division describes a hazardous classified location with a greater probability of ignition or explosion? - correct answer>>Division 1 All explosives facility hazardous locations should comply with Division 1 requirements. - correct answer>>True Which two bodies certify explosion-proof fixtures? - correct answer>>1. Underwriters Laboratories (UL)
  6. Factory Mutual (FM) According to the seal, this component is not approved for which two groups? - correct answer>>1. Group A
  7. Group E Which three of the following emit electromagnetic radiation (EMR)? - correct answer>>1. Radar
  8. Handheld
  9. Cell phone Which three are hazards posed by electromagnetic radiation? - correct answer>>1. Ignition of fuel or combustibles
  10. Activation or disabling of electrically initiated devices (EIDs)
  1. Heat generation that can damage living organisms What are the hazards of electromagnetic radiation to ordnance (HERO)? - correct answer>>Electromagnetic radiation may initiate or disable electrically initiated devices. Select the three HERO classifications. - correct answer>>1. HERO safe
  2. HERO susceptible 3 HERO unsafe Where can you find the requirements for the minimum safe separation distance between a transmitter and ordnance? - correct answer>>DA PAM 385-64, Table 17- 4 You are dissembling an ordnance item. Its internal circuitry is exposed. What HERO category applies? - correct answer>>HERO unsafe What is the appropriate action if you see this sign while traveling along a transportation route? - correct answer>>Follow the restrictions listed