海船船员考试轮机部三管轮模拟题4(轮机英语)

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  • 卷面总分:100分
  • 试卷类型:模拟考试
  • 测试费用:免费
  • 答案解析:是
  • 练习次数:25次
  • 作答时间:180分钟
试卷简介

海船船员考试轮机部三管轮模拟题4(轮机英语),本试卷是为考船舶三管轮专业考试的考生准备的轮机英语试题及答案练习。

  • 单项选择题
试卷预览
5

The booster pump, which supplies diesel oil to , should have a possibility of being powered by compressed air or by emergency power.

  • A.the main engines
  • B.the auxiliary engines
  • C.the emergency generator engine
  • D.the auxiliary engines and the main engine(s)
5

If the compression ratio is increased on any diesel engine, ________.

  • A.the expansion ratio will decrease
  • B.combustion will be slowed down
  • C.thermal efficiency will decrease
  • D.thermal efficiency will increase
5

Which of the following statements concerning butterfly valves is correct?

  • A.Special tools are required for lapping or grinding
  • B.It is impossible to throttle flow with a butterfly valve
  • C.To close the valve, it is only necessary to turn the handle a quarter of a turn
  • D.The butterfly valve should never be used in a freshwater system
5

After fuel tanks have been topped off, which of the listed procedures should be followed next?

  • A.The pressure-vacuum relief valve should be reset
  • B.The tanks should be made seaworthy to prevent contamination
  • C.The tanks should be sounded to make sure the levels are not rising
  • D.The tanks should be marked with a bull stamp on the manifold filling valve
5

In a centrifugal Freon refrigeration system, the overall capacity of the system is increased by .

  • A.opening more bypass lines
  • B.opening additional expansion valves
  • C.adding refrigerant
  • D.speeding up the machine