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UNIT 14. BEARINGSDate: 2015-10-07; view: 482. IV. Write some advice to visitors to Russia about clothing and behaviour in an office, at weekend, on the beach. III. Translate the sentences. II. Grammar. Модальные глаголы. Большинство модальных глаголов (must, should, can, may) не имеют вспомогательных глаголов в вопросительных и отрицательных предложениях, после них не ставится частица to. Must – должен (обязательство, настоятельный совет) Mustn't– нельзя (запрет) Should= (be) supposed to – следует (совет) Shouldn't– не следует Для того, чтобы спросить совет, используются следующие выражения: Do I have to…? Do I need to …? Should I …? Am I supposed to …?
Task 1. Discuss the following questions: a) b) Where is bearing used today? Make a list of possible applications of bearing. Compare it with that of your groupmates. c) Do you know any complex machines? What are their constituents?
B) Decide whether the following statements are true or false: 1. The balls in ball bearings are made from another type of steal than races. 2. A gage check each ring with an acid. 3. Grinding machine check the inner diameter of each ring. 4. Water-based liquid keeps rings from overheating. 5. Abrasive stone lubricated with oil polishes the outer ring until you can see a reflection. 6. Raceways are cleaned with oil. 7. Steel balls are classified according to their shapes. 8. Steel balls are made of steel wires. 9. Just few hours are needed to grind rough balls. 10. Hopper sends necessary quantities of balls through several tubes to the raceways of the bearing. 11. After hardening balls should be washed with cleaning solvent. 12. Ball cage retain the balls in position around the raceways.
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