【正文】 D. Nips 0035 _____ are mounted on and bolted to the bedplate cross girders. A. The crankshaft B. The crankcase C. The guideways D. The frames 0036 _____ is a precaution預(yù)防措施 which contributes to avoiding trouble under normal operating conditions. A. Constant inspection B. Keeping constant load C. Remaining constant temperature D. varying speed 0037 _____ is a source of power by which the diesel engine may operate. A. Water energy B. Electrical energy C. Chemical energy D. Heat energy 0038 _____ is arranged for cleaning the lubricating oil in the system and clean oil can be provided from a storage tank. A. A filter B. A centrifuge C. A distiller D. A generator 0039 _____ is fully floating in both connecting rod small end and the piston bosses. A. The piston B. The cross head pin C. The gudgeon pin D. The crankpin 0040 _____ is made up of a boss with separated blades mounted into it. A. A variable pitch propeller B. A variable pitch nut C. A fixed pitch parallel D. A fixed pitch screw 0041 _____ is usually driven by the engine camshaft and supplies pilot air控制氣流 to the cylinder air start valve.(2) A. An air receiver B. An operating valve C. An automatic valve D. An air distributor 0042 _____ 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 0043 _____ of the controllable pitch propeller enables the blades to be moved to change the pitch angle. A. An external mechanism B. An internal mechanism C. An interlock device D. A hunting gear system 0044 _____ on a ship transmits power from the engine to the propeller. A. Automatic control system B. Speed regularly system C. The transmission system D. Compression air system 0045 _____ or air venting arrangement is fitted to the fuel supply passage. A. An air pump B. A pressor C. A fuel pump D. A priming 0046 _____ providing lubricating films, oil used in marine diesel engines have to remove heat from oil cooled piston.(1) A. Except for B. Beside一般不用在句首 C. Except D. In addition to 0047 _____ the engines, the diesel engine is_____ used engine on board. A. Between/more monly B. Among/the most monly C. Between/not more monly D. Among/not the most monly 0048 _____ water is more expensive than fresh water. It has high specific heat and low viscosity. A. Distilled B. Distilling （表示過(guò)程） C. Boiling D. Boiled 0049 _____ for the camshaft gear train凸輪軸鏈條傳動(dòng)機(jī)構(gòu)is taken from a spur gear正齒輪 which for a six cylinder engine is at the coupling end. A. The driven gear B. The drive C. The grease D. The lubricating oil 0050 _____ in what position the engine stops there will always be at least one of the cylinders with its starting air valve open to admit pressed air to start the engine.(1) A. Because B. Owing to C. For D. No matter 0051 _____ is secured by means of sidechock bolts and endchock bolts. A. The bedplate B. The column C. The main bearing D. The double bottom 0052 _____ controls the fuel oil temperature in order to provide oil at the correct viscosity for bustion. A. The viscosity regulator B. The temperature controller C. The flow meter D. The pressure switch 0053 _____ for attachment to the propeller shaft also acmodates the turning gear and is integrally fed with the crankshaft. A. The coupling flange B. The camshaft C. The crosshead pin D. The cylinder jackets 0054 _____ should be taken out, cleaned, and lifting checked啟閥壓力試驗(yàn) every four to six months. A. Pistons B. Fuel injection valves C. Crankshaft D. Cylinder covers 0055 _____ usually helps to induce air movement to assist bustion. A. Cylinder cover B. Main bearing C. The exhaust valve D. The piston movement 0056 _____ may have two emergency source of power, thus requiring two emergency switchboards.(2) A. Large passenger vessels B. General cargo ships C. Container ships D. Oil tankers 0057 _____ supplies pilot air to control the cylinder air start valves. A. An air pressor B. An indicator cock C. An air distributor D. A safety valve 0058 _____ less equipment in contact with sea water, the corrosion problems are much reduced in a central cooling system. A. Because B. With C. Without D. Though 0059 _____ clearances in the main or crank pin bearings will sometimes be indicated by loss of pressure in the lubricating system before any bearing knock is heard. A. Too larger B. Too smaller C. Excess D. Excessive 0060 A_____ on the delivery side of the pump closes to stop fuel oil returning from the injector. A. return valve B. nonreturn valve C. safety unit D. stop valve 0061 A_____ ensures a constant pressure at the fuel main. A. transfer pump B. control air bottle C. pressure regulating valve D. nonreturning valve 0062 A cast steel strong back is fitted in way of the bustion space to help absorb_____. A. flame temperature B. fuel oil C. air movement D. gas forces 0063 A charge of fresh air is drawn