12-53. What does the hazard code PHDAN indicate on aircraft lines? 1. Potential electrical danger 2. Physically dangerous material 3. Anesthetics and harmful materials 4. Toxic and poisonous materials IN ANSWERING QUESTIONS 12-54 AND 12-55, REFER TO TABLE 12-1 IN THE TEXT. 12-54. What is the associated hazard code that identifies alcohol? 1. FLAM 2. AAHM 3. PHDAN 4. TOXIC 12-55. What is the associated hazard code that identifies trichloroethylene? 1. FLAM 2. AAHM 3. PHDAN 4. TOXIC 12-56. The success of aircraft fire-fighting, crash, and rescue techniques will continue to depend on which of the following factors? 1. Training 2. Leadership 3. Teamwork 4. Each of the above 12-57. What person must be informed when AFFF is used as the fire suppression agent on an aircraft fire and the agent is directed at or ingested into the engine or accessory section? 1. The commanding officer 2. The senior fire official on board ship 3. The  maintenance  officer  of  the  unit involved 4. The squadron quality assurance officer 12-58. In addition to the use of fire-extinguishing agents, what other method may be used to control internal aircraft engine fires? 1. Installing the engine intake covers 2. Windmilling the engine 3. Turn the aircraft into the wind 4. Let the fire burn itself out 12-59. When CO₂  or Halon 1211 is expelled directly into an engine that is hot or has an internal fire, which of the following conditions could occur? 1. Thermal shock 2. An explosion 3. Produce toxic fumes 4. Thermal runaway 12-60. In  what  area  would  you  introduce  fire- extinguishing agents to put out a fire in the engine accessory section area? 1. Access doors on the engine cowling 2. The engine intake 3. The engine exhaust section 4. The compressor section 12-61. How can burning titanium be identified? 1. By the color of the smoke 2. By the smell produced 3. By the sparking effect of the material 4. By the large amount of ashes produced 12-62. When combating class C electrical fires, what is the first thing you should do? 1. Charge all fire hoses to maximum pressure 2. Secure the source of electrical power 3. Post a fire security watch 4. Ensure a nonconductive rubber mat is placed on the deck for personnel protection 12-63. CO₂ should NOT be used to make the atmosphere in an electronics compartment inert for which of the following reasons? 1. The possibility of suffocation 2. It may cause damage to the electrical components 3. It may produce a spark 12-64. When a fire occurs in the tailpipe of an aircraft during shutdown, the aircraft engine should be started in order to attempt extinguishing through exhaust pressures. 1. True 2. False 12-27