5-37. While an HSU-1 is not in use, what method is used to make sure that the hose end remains clean? 1. It is covered with a MAF bag 2. It is covered with bubble wrap 3. It is connected to an external fitting 4. It is connected to a fitting on the base of the HSU-1 5-38. In the Navy, you are responsible for your own safety as well as the safety of your shipmates. 1. True 2. False 5-39. What device should be used on or around jet intakes during ground maintenance turnup of jet aircraft? 1. Protective struts 2. Protective covers 3. Protective screens 4. Protective stands 5-40. After operation, personnel should not work on the exhaust section of a jet engine for what minimum period? 1. 15 min 2. 30 min 3. 45 min 4. 60 min 5-41. Personnel working around jet aircraft should take which of the following precautions to protect their hearing? 1. Wear the proper ear protection 2. Complete work within exposure time limits 3. Have periodic checks on hearing ability 4. Each of the above IN ANSWERING QUESTION 5-42, REFER TO FIGURE 5-13 IN THE TEXTBOOK. 5-42. When the aircraft shown is at military power, in what zone would you be exposed to a maximum of 112 dB of engine noise? 1. Contour A 2. Contour B 3. Contour C 4. Contour D 5-43. Which of the following is either a safety precaution or a safety attitude that you should follow when you are working with or around ejection seats? 1. Always consider an ejection seat system as loaded and armed 2. Only authorized personnel may work on ejection seats 3. Ejection seats must be treated with the same respect as a loaded gun 4. Each of the above 5-44. From what direction should personnel approach an overheated wheel? 1. At a 45° angle 2. From the right side 3. From the left side 4. From the fore or aft direction 5-45. What is the recommended procedure for cooling an overheated wheel? 1. Spray the wheel with CO₂ 2. Spray the wheel with cool water 3. Spray the wheel with AFFF 4. Park the aircraft in an isolated area for 45 to 60 minutes 34