Английский язык. Писарева Л.П. - 35 стр.

                                     5 курс
                              Контрольная работа № 5

  Грамматический материал, который необходимо повторить студенту прежде,
  чем приступить к выполнению упражнений контрольной работы № 5.
- Неличные глагольные формы:
  Причастие (Participle I, Participle II)
  Инфинитив (Infinitive)
  Герундий (Gerund)
- Модальные глаголы (can, must, may, could, might) и их заменители (be able to,
  have to be allowed to, should, be to)
- Система времен в английском языке.
  Для защиты контрольной работы необходимо:
  1. Устно ответить на вопросы к тексту.
  2. Кратко пересказать текст контрольной работы.


                                    Вариант 1
                                       Text
                         Balanced Turbocharger and Engine

      Correct turbocharging is of the utmost importance because the diesel engine, in
  its modern form, long ago ceased to be a simple reciprocating machine. Today it is
  combined with a gas turbine which utilizes the exhaust gas energy and feeds
  compression to the engine. In this symbiosis between an engine and turbocharger
  the diesel engine uses that part of the energy that has a high pressure and
  temperature, but small volume, and the gas turbine uses the part with low pressure,
  low temperature, but large volume.
      At the present stage of development, the turbocharger’s air blower compresses
  the aspirated air to approximately 3kg/cm2 at 1700C. The air is then cooled to 450C
  in an air cooler and conducted to the inlet valves of engine. The piston then
  compresses the air further to 80kg/cm2 and 8000C. During the subsequent
  combustion process the pressure rises to over 120kg/cm2 and the temperature to over
  15000C. No comparable thermodynamic machine exists which can take and process
  such a high energy difference and with an overall efficiency of more than 40 per
  cent.
      With pulse pressure charging the different cylinder exhaust nozzles are combined
  in such a way so as to provide a uniform and close succession of pressure of waves
  to the turbine without scavenging of the cylinders being impeded by these pressure
  waves. Three-pulse and four-pulse pressure charging are mainly used today. With
  the former, three cylinder are combined in an exhaust manifold in such a way that
  their firing is staggered by a crank angle of 2400. In the second version four
  cylinders fire at interval of 1800. Cylinder groups of 6,9 and 12 are suitable for the
  three-pulse combination and cylinder groups of 8 and 16 for the four-pulse
  combination.
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