轮机英语【大管甲类】题库

单选题 1分

The expansion valve on a Freon system controls the__________.

  • A. superheat of the gas leaving the compressor
  • B. back pressure in the evaporator
  • C. temperature of the icebox
  • D. superheat of the gas leaving the evaporator
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1 单选题 1分
Improper maintenance of an automatic auxiliary boiler oil burner could result in_____.
  • A. fuel pump failure
  • B. fan motor failure
  • C. increased feedwater consumption
  • D. decreased boiler efficiency
2 单选题 1分
Insufficient air for combustion in a boiler furnace could result in a ______.
  • A. white incandescent flame
  • B. high flame temperature
  • C. black stack smoke emission
  • D. 0% carbon monoxide level
3 单选题 1分
Black smoke coming from a boiler can be caused by______.
  • A. low water level
  • B. excessively high pressure
  • C. high water level
  • D. low oil temperature
4 单选题 1分
Black smoke coming from a boiler can be caused by_ _______.
  • A. low water level
  • B. excessively high fuel pressure
  • C. low oil pressure
  • D. an improper air/fuel ratio
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轮机英语【大管甲类】-题库

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相关试卷

第一章 船舶主推进装置
第二章 船舶辅助机械
第三章 船舶电气和自动化
第四章 船舶轮机管理业务
第五章 国际公约、规则
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