Army Electrical Explosives Safety (Ammo-28) Exam with 100% Correct Answers 2023

Army Electrical Explosives Safety (Ammo-28) Exam with 100% Correct Answers 2023 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 answerWhen it's within 6 feet of a conductor Which bonding method is the most permanent and secure? - Correct answerExothermic 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 answer-Because 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 ESD-sensitive 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 answer-Ten 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 What is the maximum allowable resistance reading for a 3-point fall-of-potential earth resistance test? - Correct answer-25 ohms or less How often is a bonding resistance test required on an LPS? - Correct answer-Every 24 months What is the maximum allowable reading for a bonding resistance test on an LPS conductor? - Correct answer-1 ohm or less When conducting a bonding resistance test on an integral LPS with 10 air terminals and two down conductors, how many individual resistance tests are required, at a minimum? - Correct answer-20 While conducting a bonding resistance test on the integral LPS below, you placed test leads on ground rod S and air terminal N. Which three bonds listed below are NOT being tested? - Correct answer-B H P What information should be in a destructive weather plan? Select all that apply. - Correct answer-Which operations to shut down Who is responsible for shutting down each operation Steps for shutting down each operation Instructions for evacuating personnel Instructions for restarting each operation Spheric - Correct answer-Detects lightning strike Alerts when lightning is nearby Pre-strike - Correct answer-Measure the strength of atmospheric electric fields Alerts when lightning strikes are imminent What is the primary danger in a hazardous classified location? - Correct answerExplosive atmosphere Which division describes a hazardous classified location with greatest probability of ignition or explosion? - Correct answer-Division 1 Which two agencies tests and certify explosion-proof electrical equipment? - Correct answer-Army Ordnance Safety and Security Activity (AOSSA) Factory Mutual (FM) Underwriter's Laboratory (UL) Which device does NOT emit electromagnetic radiation? - Correct answer-Calculator Which three are hazards posed by electromagnetic radiation? - Correct answerGeneration of extreme heat in the human body ignition of fuel and other combustibles Activation or disabling of electrically initiated devices (EIDs)