11-47. The Navy uses which of the following lightning protection systems? 1. Primary only 2. Secondary only 3. Primary and secondary 4. Direct and indirect 11-48.   The separately mounted lightning mast system and  the  separately  mounted  overhead  ground wire system are what type of lightning protec- tion systems? 1. Primary 2. Secondary 3. Direct 4. Indirect 11-49.   Signs posted at the entrances of restricted areas should   contain   all   EXCEPT   which   of   the following words? 1. Restricted 2. Credentials 3. Stop 4. Explosives 11-50.   When magazine and explosive areas are NOT protected  by  suitable  fencing,  which  of  the following precautions should you take? 1. Notify the officer of the day 2. Notify the commanding officer 3. Assign guards or patrols 4. Light the areas 11-51.   For  specific  requirements  regarding  posting, fencing, unguarded facilities, unguarded vehicles,    emergency    events,    and    security systems,   you   should   refer   to   which   of   the following instructions? 1. OPNAVINST 5510.15 2. OPNAVINST 5530.13 3. SPCCINST P8010.12 4. CINCLANTFLTINST 8010.4 11-52.   A magazine inspection is conducted to ensure which of the following conditions? 1. Repairs are made only 2. Safety regulations are being observed only 3. Contents are not deteriorating only 4. Repairs  are  made,  safety  regulations  are being   observed,   and   contents   are   not deteriorating 11-53.   A   regularly   scheduled   magazine   area   in- spection  is  conducted  for  which  of  the  fol- lowing reasons? 1. To ensure firebreaks are maintained 2. To   ensure   fire   protection   equipment   is available and serviceable 3. To  ensure  roads  are  in  good  and  usable condition 4. Each of the above 11-54.   The   majority   of   ammunition   in   the   Navy's inventory    is    designed    to    withstand    what maximum temperature? 1. 105ºF 2. 130ºF 3. 150ºF 4. 160ºF 11-55.   Magazines and magazine areas may be inspected  at  night  to  check  for  which  of  the following conditions? 1. Safety 2. Security 3. Cleanliness 4. Temperature 11-56.   Magazine inspection logbooks may be destroyed   after   what   minimum   number   of months have elapsed since the date of the last entry? 1. 15 months 2. 12 months 3. 9 months 4. 6 months 11-57.   Ordnance  handling  equipment  should  be  in- spected at least how often? 1. Daily 2. Immediately prior to use only 3. During use only 4. Immediately prior to use and during use 11-58.   For  detailed  instructions  on  shipping,  receiv- ing, and reporting ammunition shipments, you should  refer  to  which  of  the  following  NAV- SEA publications? 1. OP 2136 2. OP 2142 3. SW020-AG-SAF-010 4. TW010-AC-ORD-010 61