三管轮轮机英语大证考试真题40期.docVIP

中华人民共和国海事局 2006年第2期海船船员适任证书全国统考试题(总第40期) 科目：轮机英语 试卷代号：805 适用对象：无限、近洋航区3000KW及以上船舶二/三管轮 （本试卷卷面总分100分，及格分为70分，考试时间为100分钟） 答题说明：请选择一个最合适的答案，并将该答案按答题卡要求，在其相应位置上用2B铅笔涂黑。第1题至74题，每题1分，第75题至78题，每题1.5分,第79题至80题, 每题10分。 一、单项选择题 ______usually helps to induce air movement to assist combustion. A. Cylinder cover B. Main bearing C. The exhaust valve D. The piston movement The mechanical efficiency of an engine is always less than 100% ______losses occurring in the form of friction. A. because B. since C. due to D. owing The exhaust ports are located around the lower part of the cylinder liner, ______the products of combustion are driven by scavenging air. A. in which B. by which C. through which D. from which The third engineer took the ______and checked the tank table in the office and recorded all relevant data, as well as calculated the bunkering. A. water level B. sump level C. ballast tank level D. ships trim The lubricating pipes and ducts should be blown out with ______. A. the atmosphere B. the fresh water C. the compressed air D. the chemical compounds ______neutralizes the acid conditions and ______cleanses the rings and grooves. A. The detergency/the alkalinity B. The alkalinity/the detergency C. The inhabitant/ the water D. The additives/the distilled water If the engine does not start on air, it may be due to______. A. low compression of the fuel pumps B. incorrect timing of fuel pumps C. the starting air valves stuck D. air-locks in fuel oil pipeline ______device is provided to prevent starting air from being admitted to the cylinder before the reversing is completed. A. An automatic B. A transmission C. A self-regulating D. An interlocking A reduction in load on a diesel engine results in ______of speed of the c