轮机英语关联题题库最新整理91篇带翻译1.docx

1、轮机英语关联题题库最新整理91篇带翻译120规则海事公开题库关联题大全Passage 1 （原题库第1篇） Valve drive mechanism The valve drive mechanism commands the inlet and exhaust valves at the required timing. 第3题The valve drive mechanism consists of an inlet and exhaust cam follower (8) each suspended in a plunger of the tappet assembly (7), t

2、wo tubular push rods (4) with ball joints, two nodular cast iron rocker arms (2) suspended in a rocker arm bearing bracket, two yokes (5) and a yoke guide pins. See Fig. 4-1. The tappet rollers follow the cam profiles and transfer the movements through push rods to the rocker arms. 第4题The rocker arm

3、s operate the inlet and exhaust valves through yokes (5). Lubrication for the rocker arms comes from the engines secondary oil supply manifold throughdrillings in the cylinder head and rocker arm bracket. 第2题The tappet assembly receives lubricating oil via channels in the engine block from the main

4、supply manifold. For the roller and shaft, the oil is supplied through the guiding plunger. 第4题To compensate for heat expansion a clearance must exist between the rocker arm and yoke.第1题All adjustments have to be done on a cold engine only.1. According to the Passage, the best time to adjust the val

5、ve clearance is _.A. before the engine is started B. when the engine is runningC. after the engine has just been stopped D. when something has gone wrong with the engine注：根据文章来看，调节阀间隙的最好时间是在发动机启动之前。2. The roller and the tappet assembly are lubricated by means of_.A. the main lube system B. the secon

6、dary oil systemC. the special pumping system D. the turbine oil system注：滚轮和挺杆组件借助于主润滑系统润滑。3. According to the Passage, the valve drive mechanism does not include_.A. tappet rollers B. push rods C. nodular cast iron D. yokes and guide pins注：根据文章来看，阀驱动机构不包括球墨铸铁。（包括挺杆滚轮、顶杆、吊梁和导销）4. To close valves tigh

7、tly, which clearance should be inspected according to the maintenance schedule?A. The one between the cam and the tappet roller. B. The one between the push rods and the ban joints.C. The one between the rocker arms and the yoke D. The one between two tubular push rods.注：依据保养清单，要紧密的关闭阀件，应检查摇臂和吊梁之间的间

8、隙。Passage 2 （原题库第3篇） Charge air coolerThe engine is equipped with a charge air cooler. The insert type charge air cooler is mounted in a welded casing (air trunk). The trunk is bolted to the engine block. 第1题Standard is a two-stage cooler mounted. The first stage, through which the charge air flows,

9、 is cooled with water from the HT cooling system and cooks the charge air till approx. 90 100oC. The second stage is supplied with water coming from the LT water system and cooks the charge air further till the required temperature of approx. 50oC. 第2题(B)By controlling the water flow through the LT

10、cooler the charge air temperature can be kept constant at the required temperature. The circulating coolant water should always be under positive pressure and should be as clean as possible. The operating air temperature should be maintained by controlling the coolant inlet temperature. Whilst the e

11、ngine is running the air and coolant temperatures and pressures at inlet and outlet should be checked and logged periodically. 第3题 Variations from normal indicate faults developing such as fouling of the film plates or obstruction of the water tubes.第4题Check daily, during operation of the engine, th

12、e working of the telltale hole at the free end of the charge air receiver. The function of this hole is to inform the operator the presence of water in the charge air receiver. Under normal condition only compressed air should escape from this hole.1. According to the Passage, the expression HT prob

13、ably means_.A. HIGH TANK B. HIGH TEMPERATURE C. HEAT TRANSMISSION D. HEAT TRANSFER注：根据文章来看, HT的意思是：high temperature，高温。2. In order to maintain the change air temperature we should control_.A. the coolant inlet temperature coming from the first stage coolerB. the coolant flow coming from the second s

14、tage coolerC. the coolant outlet temperature coming from the second stage coolerD. the coolant flow coming from the flint stage cooler注：为维持增压空气的温度，我们应控制来自第二级冷却器的冷却剂流量。3. The charge air temperature departing from normal may indicate that_.A. condensate can be formedB. only compressed air should escap

15、e from the telltaleC. the film plates are becoming dirty or the water tubes are blocked by scaleD. cooling water may have been carried into the cylinders注：增压空气温度偏离正常表明镀膜变脏或水管被水垢堵塞。4. The function of the telltale hole is to_.A. detect whether compressed air has escaped from the holeB. control the coo

16、lant inlet temperatureC. determine whether the coolant water is under positive pressureD. inform the operator the presence of water in the charge air receiver注：警报孔或监视孔的作用是同志作业员扫气箱中有水。 telltale hole监视孔，指示孔，警报孔； charge air receiver. 扫气箱Passage 3 （原题库第6篇） 第1题 At the first start, listen carefully for possible jarring sounds. If anything is su