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Assignment 7 - 14020_323
Assignment 7-Cont. - 14020_325

Aviation Structural Mechanic E2 - How airplanes are built and how to maintain them
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7-8. When making a functional check of an oxygen regulator, holding the emergency pressure control lever in the TEST MASK position produces which of the following results on the oxygen regulator panel? 1. The lamp will light 2. An increase in pressure on the pressure gauge 3. The flOW indicator will go to the white position 4. Each of the above 7-9. What are the LOX converter’s three sequences of operation? 1. Service, supply, and reservice 2. Fill, buildup, and supply 3. Reservice, supply, and buildup 4. Buildup, supply, and standby IN ITEMS 7-10 THROUGH 7-14, SELECT FROM COLUMN B THE SEQUENCE OF LOX SYSTEM OPERATION THAT IS AUTOMATICALLY STARTED BY EACH ACTION/VALVE OPERATION LISTED IN COLUMN A. SEQUENCES OF OPERATION IN COLUMN B B MAY BE USED MORE THAN ONCE. 7-10. 7-11. 7-12. 7-13. 7-14. A. Actions/ B. Sequence of Valves Operations Operations The differen- 1. Fill tial check valve opens 2. Buildup The trailer 3. Demand mode hose nozzle is removed 4. Supply- from the economy converter mode The pressure opening valve unseats The trailer hose nozzle is connected to the filler port When oxygen becomes available at the supply outlet 46 7-15. When installing a section of tubing in an aircraft’s oxygen system, which of the following items is permitted for use on the threads of the tubing connectioms prior to tightening? 1. Locktite 2. Waterproof grease 3. Antiseize tape 4. Thread compound Learning Objective: Identify the system compo- nents and operation of the onboard oxygen generating system (OBOGS). 7-16. Which of the following is an advantage of the OBOGS as compared to the LOX system? 1. An OBOGS requires no exten- sive depot-level maintenance 2. An OBOGS eliminates the need for daily servicing 3. An OBOGS requires no special transportation and storage equipment 4. Each of the above 7-17. Scheduled preventive maintenance occurs at what number of hours on the OBOGS? 1. 1,000 hours 2. 2,000 hours 3. 3,000 hours 4. 4,000 hours 7–18. Through which of the following components does the OB0GS receive engine bleed air? 1. Engine turbine 2. Heat exchanger 3. Cooling turbine 4. Ram air outlet 7-19. Which, if any, of the following elements is retained in the molecular sleeve beds as the airflow passes through them? 1. Oxygen 2. Nitrogen 3. Argon 4. None of the above







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