1-10. What  type  of  batteries  provides the longest service life at temperatures  above  15  degrees Fahrenheit? 1. Nickel-cadmium 2. Lithium 3. Alkaline 4. Mercury 1–11. Which  of  the  following range/purpose   combinations pertain(s)  to  the  AN/PAS–6 Metascope? 1. 12  inches/signaling 2. 1  mile/signaling 3. 1 foot/map reading 4. Both 2 and 3 above 1–12. For what purposes, other than identification  of  long-range objects, is the MK37 NVS on the ship’s  signal  bridge  used? 1. Navigation  and  signaling 2. Fire  control  and  signaling 3. Navigation  and  fire  control 4. Both 2 and 3 above 1-13. What is the AN/TVS-5 NVS mainly used  for? 1. Aimed fire of weapons 2. Navigation 3. Infrared  detection 4. Map  reading 1–14. Which  of  the  following  NVS  units can be safely submersed to a depth of 50 meters? 1. Aquila 2. KN200 3. M921 4. AN/PVS-4 1-15. Which of the following NV units enables the user to pilot rotary wing aircraft or to drive high- speed  ground  vehicles? 1. AN/PVS-5C 2. AN/AVS-6 3. CATSEYE 4. KN200 1–16. In which of the following sights is the intensified image superimposed on the “real world” image? 1. AN/AVS-6  NVG 2. AN/PAS-6  NVS 3. AN/PVS-7B  NVG 4. CATSEYE NVG 1-17. Which  type(s)  of  maintenance  does an ET usually perform on night vision  equipment? 1. Corrective   maintenance 2. Preventive   maintenance 3. Depot  level  repair 4. All of the above 1-18. What type of batteries is being removed from service due to ecological   problems? 1. Mercury 2. Nickel-cadmium 3. Alkaline 4. Lithium 1-19. What  type  of  batteries  requires down  time  for  recharging? 1. Mercury 2. Nickel–cadmium 3. Alkaline 4. Lithium 1-20. What type of batteries has the shortest  service  life? 1. Mercury 2. Nickel-cadmium 3. Alkaline 4. Lithium 1–21. Service use of lithium batteries must be approved by whom? 1. NAVOSH 2. Naval  Surface  Warfare  Center 3. Navy  Lithium  Safety  Review Board 4. Both 2 and 3 2