12-12.    What is the primary fire-fighting agent used to extinguish burning flammable or combustible liquid spill fires? 1. Water 2. AFFF 3. PKP 4. Halon 12-13.    By what means does CO₂  extinguish a fire? 1. By   cooling   the   fire   below   its   ignition temperature 2. By  eliminating  all  heat 3. By    diluting    and    displacing    its    oxygen supply 4. By settling and blanketing the fire 12-14.    By what means does Halon 1211 extinguish a fire? 1. By   cooling   the   fire   below   its   ignition temperature 2. By eliminating all heat 3. By settling and blanketing the fire 4. By inhibiting the chemical chain reaction and decomposing upon contact with flames 12-15.    What  two  fire-fighting  agents  are  used  in  the twin  agent  units  on  board  flight  and  hangar deck mobile fire-fighting equipment? 1. AFFF/Halon 1211 2. CO₂/PKP 3. Water/AFFF 4. PKP/Halon 1211 12-16.    What fire-fighting agent is used for combating flammable liquid fires? 1. Water fog 2. AFFF 3. PKP 4. CO₂ 12-17.    What  is  the  diameter  of  fire  hoses  used  on board naval ships? 1. 1/2 or 1 inch 2. 1 1/2 or 2 1/2 inch 3. 2 or 3 inch 4. 2 1/2 or 3 1/2 inch 12-18.    How many gallons of concentrated AFFF are contained in a high-capacity AFFF station on board ship? 1. 200 gallons 2. 400 gallons 3. 600 gallons 4. 800 gallons 12-19.    Where are the AFFF sprinkler systems installed in the hangar bay aboard ship? 1. In the overhead 2. On the hangar deck 3. On each bulkhead 4. In each CONFLAG station 12-20.    Where     are     the     flight     deck     AFFF     fixed fire-fighting system controls located? 1. Primary flight control (Pri-Fly) 2. Navigation bridge 3. Both 1 and 2 above 4. Flight deck control 12-21.    Vari-nozzles    are    used    on    all    AFFF    and saltwater    hose    lines. All    nozzle    gallon- per-minute  flow  rates  are  based  on  what  psi pressure at the nozzle inlet? 1. 100 psi pressure 2. 200 psi pressure 3. 300 psi pressure 4. 400 psi pressure 12-22.    What is (a) the length of Navy fire hoses and (b) the maximum operating pressure? 1. (a) 20 feet (b) 100 psi 2. (a) 35 feet (b) 225 psi 3. (a) 50 feet (b) 270 psi 4. (a) 75 feet (b) 340 psi 12-23.    Fire hose pressure above 150 psi is hazardous because  excessive  nozzle  reaction  force  may result in loss of nozzle control. 1. True 2. False 12-24.    What  is  the  purpose  of  the  hard-rubber  and hardwood  plugs  contained  in  the  aircraft  tool kit? 1. To seal ruptured fire hoses 2. To stop fuel tank leaks 3. To seal off aircraft intakes 4. To wedge open aircraft canopies 12-25.    How     does     aluminized     protective     clothing provide protection to fire fighters? 1. Because of its thermal lining 2. Because  of  a  positive  airflow  valve  that cools the wearer 3. Due to its high percentage of reflectivity to radiant heat 4. Because    of    its    lightweight    fabric    con- struction and ease of mobility 12-24