轮机英语大证考试真题48期.docVIP

中华人民共和国海事局 2009年第5期海船船员适任统考试题（总第48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。 1. Diesel engines classified as reciprocating internal combustion engines because they____ A. use energy from fuel burned outside their cylindersB. burn fuel in a combustion chamber that moves back and forthC. burn fuel in a chamber where its energy moves a piston up and downD. a continuous combustion process to impart rotary motion to the pistons2. The abbreviation “MIP” stands for _____A. middle indication pressure? ?? ?? ???B. mean indicated pressure C. mean indicated pitch? ?? ?? ?? ?? ?D. middle indicated power3. The term used to express the ignition quality of a particular fuel is _____? ?A. cetane number? ?? ?? ?? ? B. octane number? ?C. ignition index number? ?? ? D. volatility point4. The period when both inlet valves and exhaust valves are open is referred to as____? ?A. valve loop? ? B. valve uniflow? ?C. valve overlap? ? D. valve grinding5. Which of the following statements represents the function of the compression rings installed at the top of a diesel engine piston?? ?A. Control the amount of lube oil burned in the combustion chamber? ?B. Transmit heat from the piston to the cylinder liner? ?C. Prevent damage to ring groove inserts by action as a heat dam.? ?D. Dissipate combustion chamber gas pressure by channeling it through the ring gap.6. The gas loads on the engine structure are constrained by means of hydraulically preloaded_____ ??Which connect the bed plate, frame sections and cylinder jackets into a single unit.??A. connecting rods? ? B. mean bearing? ? C. column? ?? ? D. the rods7. ______of different thickness are inserted between the shells to enable adjustment of the bearing clearness.??A. Screws? ???B. Films? ???C. Dises? ???D. Shims8. Compared to four-stroke/cycle engines, two-stroke/cycle diesel engines have