Английский язык. Писарева Л.П. - 45 стр.

                                          Exercises


I.         Прочтите и переведите текст письменно.
II.        Переведите предложения, обращая внимание на модальные глаголы и
           их заменители.
      1.   Automatic controls should be installed to start and stop compressors in
           accordance with pressure changes in the air tanks.
      2.   In one arrangement air starting valves can be operated by cams and levers.
      3.   If an attached compressor is used, a small independent unit must be provided.
      4.   Simple cooling may be in the form of an open or closed system.
      5.   When a separate fresh-water system is employed an extra fresh-water cooler and
           pump for circulating sea water through the fresh-water cooler have to be
           provided.

III.       Исправьте те предложения, которые искажают                   смысл     текста.
           Запишите правильный вариант. Переведите.

      1. There is no necessity to provide a film of oil between surfaces having relative
         motion.
      2. Any oil can be used as lubricant.
      3. The oil may be supplied to the cylinders in any desired quantities.
      4. The customary method of applying oil to the cylinder walls is by means of small
         pumps.
      5. When the oil has passed through all the bearings it goes to waste.
      6. Pressure circulating system is used to oil all the bearings.

IV.        Выберите из трех данных предложений то, которое является ответом
           на вопрос. Укажите букву ответа. Сделайте перевод.

      1. What are general types of surfaces which need lubrication in a diesel engine?
         a) They are crankshaft and camshaft surfaces.
         b) They are cylinder and bearing surfaces.
         c) They are valve gear and valve surfaces.
      2. How is oil supplied to the cylinder walls?
         a) It is supplied by a crank.
         b) It is supplied by the pressure.
         c) It is supplied by a group of small pumps.
      3. Are there any difficulties in maintaining the film of oil on the cylinder walls?
         a) No difficulties at all.
         b) There is some difficulty in supplying the oil to the cylinder.
         c) There are two main difficulties in maintaining a proper film of oil on the
            cylinder wall 1) high temperature due to which the oil tends to oxidize and 2)
            the high pressure which tends to squeeze oil out from between the surfaces.
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