Aviation Technical English for aircraft maintenance engineers (Авиационный технический английский язык для студентов-авитехников)

31 PURPOSE 1. Study the ways to express purpose in English. 1. The purpose of the ……. is to ……. . 2. The ……. is used/designed/made to …… . 3. The ……. is used/designed/made for …… . 4. …….. provides ……. . 5. ……. act/acts as …… . 6. …… serve/serves as …… . 7. …… serve/serves to/for …… . 8. …… enable/enables (permit/permits; allow/allows) …… . 2. Translate the following sentences which express purpose. 1. The purpose of the test bench is to test the equipment. 2. The purpose of the Follow-up Mechanism is to shut the control valve. 3. The purpose of the drain valves is to drain water. 4. The test bench is used to test the equipment. 5. The Follow-up Mechanism is designed to shut the control valve. 6. The drain valves are made to drain water. 7. The test bench is used for testing the equipment. 8. The Follow-up Mechanism is designed for shutting the control valve. 9. The drain valves are made for draining water. 10. The oil system provides lubrication for the bearings. 11. A double step-down reduction-gear provides the drive for the propeller. 12. The APU provides electrical power for ground operation. 13. The spill valve in the fuel pump acts as a safety valve. 14. The APU serves as a supplemental power source when required in certain flight phases. 15. The air also serves to pressurize the labyrinth seals. 16. Two transfer contactors enable compete AC supply by any of the three generators.