Army Electrical Explosives Safety (Ammo-28) With 100% Correct Answers

Which two publications provide detailed information on lightning protection systems? - Correct Answer- DA PAM 385-64 NFPA 780 Which statements about lightning protection are true?Select all that apply. - Correct 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? - Correct 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? - Correct Answer- at least 6 feet Which LPS uses air terminals and conductors mounted directly to the structure? - Correct Answer- Integral Why does the wooden mast have an air terminal on top and two down conductors running its entire length? - Correct Answer- The wooden mast is not electrically conductive Which of the following is NOT a requirement for air terminals? - Correct Answer- Air Terminals must be at least 6 feet tall. During the inspection, John's team logged a discrepancy for this air terminal. Why? - Correct 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? - Correct 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? - Correct 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? - Correct Answer- 60 feet or less