ARMY ELECTRICAL EXPLOSIVES SAFETY /AMMO28/ EXAM LATEST ACTUAL EXAM 135 QUESTIONS AND CORRECT DETAILED ANSWERS WITH RATIONALES ANSWERS ALREADY GRADED A+

ARMY ELECTRICAL EXPLOSIVES SAFETY /AMMO28/ EXAM LATEST ACTUAL EXAM 135 QUESTIONS AND CORRECT DETAILED ANSWERS WITH RATIONALES ANSWERS ALREADY GRADED A+ 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 Which statement about grounding systems is true? - CORRECT ANSWER-The resistance should be 25 ohms or less. Which of the following statements regarding bonding are true? Select all that apply. - CORRECT ANSWER-Bonding reduces the threat of sideflash by providing a low impedance path to ground. Bonding is a way of connecting LPS conductors to grounded metal objects. When should a grounded metal object be considered for bonding? - CORRECT ANSWER-When it's within 6 feet of a conductor Which bonding method is the most permanent and secure? - CORRECT ANSWER-Exothermic weld Which factors are used to calculate bonding distance?Select all that apply. - CORRECT ANSWER-Height of proposed bond Flashover medium Number of down conductors While conducting the inspection, John's team noticed a new metal light pole installed 3 feet from the down conductor at the corner of this building. They logged a discrepancy. Why? - CORRECT ANSWERBecause grounded metal objects within 6 feet of LPS conductors should be bonded to it Which types of information does an LPS record provide? Select all that apply. - CORRECT ANSWER-Test locations Test item descriptions or listing Type of test Responsibilities for conducting and administering the test plan Which section of DA PAM 385-64 provides LPS visual inspection guidance? - CORRECT ANSWER-Appendix D How often is a visual inspection required on an LPS? - CORRECT ANSWER-Every 12 months While conducting the LPS inspection, the team saw these surveillance cameras. Does this building comply with LPS standards? - CORRECT ANSWER-No, because the surveillance cameras are outside the zone of protection. How long must LPS test results be kept on file? - CORRECT ANSWER-6 inspection cycles How often is a conductive floor electrical test required in an ESDsensitive operating facility? - CORRECT ANSWER-Every 6 months For best accuracy, how many individual resistance tests are recommended for a conductive floor? Refer to DA PAM 385-64, Section C-3 as required. - CORRECT ANSWERTen test: Five electrode-to-electrode tests and five electrode-to-ground tests This conductive floor was tested at five locations. The average resistance of the electrode-to-electrode test was 55,871 ohms. Does this test pass? Refer to DA PAM 385-64, Section C-3. - CORRECT ANSWER-Yes, because an average resistance of 55,871 ohms is within standards How often is a 3-point fall-of-potential earth resistance test required on an LPS? - CORRECT ANSWER-Every 24 months When conducting a 3-point fall-of-potential earth resistance test on an integral LPS, how far from the ground rod should you place the C2 and P2 test probes? Refer to DA PAM 385-64, Table B-1 as required. Select one response for the C2 probe distance and one response for the P2 probe distance. - CORRECT ANSWER-C2 probe at 131 feet P2 probe at 82 feet