4-18. As directed by NAVAIR, aircraft deployed aboard an aircraft carrier will be washed and cleaned a minimum of how often? 1. Every 7 days 2. Every 10 days 3. Every 14 days 4. Every 28 days 4-19. Mandatory aircraft cleaning is always required after an aircraft is exposed to which of the following substances? 1. Fire-extinguishing materials splashed on the landing gear 2. Alkaline cleaning solution splashed on the wings 3. Exhaust deposits on the aft fuselage 4. Rocket blast deposits on the forward fuselage 4-20. Unpainted surface of struts and actuating cylinder rods should be cleaned or wiped down at what prescribed interval? 1. Daily 2. Twice weekly 3. Weekly 4. Twice monthly 4-21. When handling, using, and storing aircraft cleaning materials, what is/are the most serious hazard(s) you will meet? 1. Heat expansion 2. Flammability only 3. Toxicity only 4. Flammability and toxicity 4-22. When using hazardous chemicals, you should wear which of the following protective devices? 1. Gloves and aprons only 2. A face shield only 3. An approved respirator only 4. Gloves and aprons, a face shield, and an approved respirator 4-23. Solvents must be kept in specially marked containers if they contain more than what percent by volume of chlorinated materials? 1. 8% 2. 10% 3. 12% 4. 24% 4-24. When volatile and flammable materials are not being used, they should be stored in which of the following areas? 1. In a metal cruise box inside the corrosion control work spaces 2. Inside a separate locker in the material control spaces 3. Inside a separate building or flammable liquids storeroom 4. Inside a designated hangar space 4-25. What solvent is generally used as an all- purpose cleaner in naval aviation maintenance? 1. Methyl ethyl ketone 2. Aliphatic naptha 3. Aromatic naphtha 4. Dry-cleaning solvent 4-26. Which of the following solvents is an alternate compound for cleaning acrylics? 1. Methyl ethyl ketone 2. Aliphatic naphtha 3. Aromatic naphtha 4. Ammonium hydroxide 4-27. Safety solvent is intended for use when a high flash point is required. You should NOT use safety solvent to clean which of the following areas of an aircraft? 1. Oxygen systems 2. Avionic/electrical systems 3. Disassembled/assembled engine components 4. Wheel bearing and brake components 23