中华人民共和国海事局2002年第2期海船船员适任证书全国统考试题（总第29期）科目：轮机英语 试卷代号：804适用对象：无限、近洋航区750-3000KW船舶大管轮（本试卷卷面总分100分，及格分为70分，考试时间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68题，每题1分，第69题至76题，每题15分，第77题至78题，每题10分。一 单项选择题_ the supercharge pressure is, _ power an engine develops A The higher/the more B Higher/more C Higher/little D The higher/the less2 _ tappet clearance will cause the exhaust valve to open late and close early in cycle and will reduce its maximum lift A Correct B Insufficient C Excessive D None of the above3 Acid solution _ in the system can be tested from time to time by putting some on to a piece of lime A strength B dense C percentage D velocity 4The lowest temperature required to cause self-sustained combustion of a substance independent of any outside source of ignition is called _ A explosive range B flash point C ignition temperature D combustion temperature 5Before starting M/E, _ should be worked by hand to minimize wear on the liners A the cylinder oil B the starting valves C the cylinder lubricators D the turning gear6 To minimize corrosion, fuel oil strainer disks, spacers and scraper blades are made of _ A brass B copper C iron D monel metal or stainless steel 7 Low compression results from _ Aa worn cylinder Bbroken piston rings Ceither A or B DNone of the above 8 An electric heater built into some smaller diesel engines is used to _ A raise lube oil viscosity for easier starting in cold weather B increase air inlet temperature C increase compression ratio D increase jacket water temperature for easier starting in cold weather 9 There should be a lubricating oil _ between the main bearings and the crankshaft A film B cap C lacquer D shell10 _ is the removal of exhaust gases by blowing in fresh air A Gas exchange B Charging C Scavenging D Supercharging11The casing of the independent thrust block is in two halves which are joined by _ A through bolts B jack bolts C tie bolts D fitted bolts12A(n) is a chemical or electro-chemical attack on the metal surface which may be further increased if the sea-water is polluted A errosion B corrosionC cavity D scouring 13Some vessels are equipped with a water lubricated stern tube When at sea, operating under normal conditions, the water service valve from the ships saltwater system to the bearing should be _ A closed, and no leakage permitted across the shaft packing B closed, and only slight leakage permitted across the shaft packing C open, and no leakage permitted across the shaft packing D open, and only slight leakage permitted across the shaft packing14When a centrifuge is arranged to separate impurities and small amount of water from oil, it is known as a _ A purifier B separator C filter D clarifier 15Wear in a cylinder liner is usually due to _ A friction B abrasion C corrosion D All of the above16Wear in parts of exhaust valve operation gear will tend to _ the tappet clearanceA increase B reduce C rise D reduction17The gear and screw pumps are classified as _ A variable stroke pumps B multistage pumps C positive displacement pumps D triple-ported pumps18A more sophisticated pressure reducing valve incorporates a pilot valve which controls the fluid above the valve operating piston in response to downstream pressure The bold and italic word “ which ” means_ A a pressure reducing valve B a pilot valve C an operating piston D downstream pressure19A pump is said to have negative suction head when the pump is located _ A between the suction and discharge B below the liquid supply C above the liquid supply D Any of the above20The water in an auxiliary boiler should be tested daily for _ A dissolved oxygen B chlorides C sludge D dissolved nitrogen 21 A _ boiler is an auxiliary boiler sometimes included in a steamships installation for supplying steam to auxiliaries in port A monkey B donkey C waste heat D main 22Here some oil in the oily water separator, as a result of its lower _, will separate and rise into the oil collection space A temperature B viscosity C density D velocity 23The term discharge , as it applies to the pollution regulations, means _ Aspilling B leaking C dumping D All of the above 24 In a complete oil/water separator, more oil will separate out onto the underside of these plates and travel outwards until it is free to rise into the oil collecting space Whats the meaning of “it” in the sentence above? A a separator B oil C water D an oil collecting space 25Which of the l