最新《轮机英语》考证补充题（20100818）1. There are four main types of marine engines: and the marine nuclear plant.A. the diesel engine, the steam turbine and dual-fuel engineB. the diesel engine, the steam turbine and the gas turbineC. the gas-diesel engine, the gasoline engine and the diesel engineD. the gasoline engine, the diesel engine and the steam turbine注：船用发动机有四种主要类型：柴油机、汽轮机、燃气轮机和船舶核动力装置，选B。
2. In crosshead engines in good condition the cylinder oil consumption may usually be .A. bellow 0.1 g/hp. hr.B. above 10 g/hp. hr.C. below 1.0 g/hp. hr.D. zero注：十字头式柴油机在状态良好的情况下气缸耗油率低于1.0 g/hp. hr., 选C。
3. The is the power available at the output shaft of the engine and can be measured usinga torsionmeter or with a brake.A. electric powerB. shaft powerC. indicated powerD. mechanical power注：轴功率是指发动机输出轴上可获得的功率，可以使用扭矩表或刹车来测量，选B。
4. The greatest turbulence in a diesel engine cylinder is created by the .A. shape of the combustion chamberB. fuel injection spray patternC. cylinder swept volumeD. degree of penetration of the fuel oil droplets注：柴油机气缸内最大的湍流是由燃油液滴的穿透程度产生的，选D。
5. The liquid flowing in the capillary is such that the difference in _____ readings taken before the capillary and after it is related to the oil viscosity.A. pressureB. velocityC. flow rateD. temperature注：对于在毛细管内流动的液体，毛细管前后测取的压差与油的粘度有关，选A。
6. The starting air bottle should be pumped up to maximum pressure by the _____ before start of the engine.A. air compressorB. refrigeration compressorC. vacuum pumpD. purifier注：在发动机启动前，应使用空压机将启动空气瓶打到最大压力，选A。
7. The primary task of the compressed air system is to deliver the starting air necessary for _____.A. starting the M.E.B. starting the emergency electric alternatorC. driving the main turbineD. driving the turbocharger注：压缩空气系统的主要任务是为启动主机提供压缩空气，选A。
8. Air compressor receivers should be “blown down” at least _____.A. yearlyB. quarterlyC. monthlyD. daily注：空气瓶应每天放残，选D。
9. Starting air for auxiliary engines may be taken directly from the main reservoirs or through .A. an auxiliary reservoirB. a controlling air bottleC. an emergency air compressorD. a main air compressor注：辅机的启动空气可直接来自主空气瓶，也可来自辅空气瓶，选A。
10. The air reservoirs must have _____ fitted to prevent rupture in the event of fire.A. high pressure alarmB. fire alarmC. extinguishersD. fusible plugs注：空气瓶必须安装易熔塞，以防发生火灾时爆炸，选D。
11. Air reservoirs are designed, built and tested similarly to _____.A. boiler drumsB. hot wellsC. condensersD. evaporators注：空气瓶的设计、建造和试验类似于锅炉的锅筒，选A。
12. When the prime movers of two paralleled generators are equipped with mechanical- hydraulic governors, and are operating within their designed range, the unit with the least amount of speed droop will _____.A. pick up more of any increase in loadB. pick up less of any increase in loadC. share an equal amount of any increase in loadD. drop an equal amount of any decrease in load注：当两台并车运行的发动机的原动机装有机械液压式调速器，并在设计范围内运行，速度降小的装置将会承担更多增加的负荷，选A。
13. Which of the following devices is a common basic element with nearly all mechanical governors?A. Power pistonB. Control rackC. Weights acted on by centrifugal forceD. Isochronous droop spring注：受离心力作用的飞重是几乎所有机械式调速器共有的基本部件，选C。
14. The required amount in the change of speed necessary before a governor will make a corrective movement is known as _____.A. speed droopB. sensitivityC. stabilityD. promptness注：在调速器能做出纠正动作之前所需要的速度变化量，称为灵敏度，选B。
15. Which of the following devices is common to both mechanical and hydraulic governors?A. Direct linkage between the ball-head and fuel rack.B. A servomotor.C. A compensating device.D. Flyweights.注：对于机械和液压式调速器，飞重是共有的部件，选D。
16. On most diesel engines, the governor controls the output speed by _____.A. controlling the amount of fuel injected into the cylindersB. varying the speed of the turbochargerC. adjusting the compression ratioD. changing the timing of the fuel injection camshaft注：在大多数柴油机中，调速器是通过控制喷入气缸的燃油量来调节速度的，选A。
17. The ability of the governor to prevent fluctuations in engine speed is termed _____.A. sensitivityB. stabilityC. promptnessD. speed droop注：调速器防止发动机速度波动的能力，称为稳定性，选B。
18. Oil mist detectors are usually used on board to detect oil mist density within _____.A. the engine crankcaseB. the engine scavenge boxesC. drain tanksD. fuel tanks注：船上油雾探测器通常用于探测发动机曲轴箱内的油雾浓度，选A。
19. An auxiliary reservoir for starting auxiliary engines should be kept at _____.A. low pressure at all timesB. full pressure at all timesC. low pressure at intermittenceD. full pressure at intermittence注：用于启动辅机的辅空气瓶，在任何时候都应保持在最大压力，选B。