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单选题 For the diesel engine,the operation between two fuel oil injections喷射 is called a( ),whichconsists of a fixed sequence of events固定的相序
学科：轮机英语
时间：2023-09-23 06:24:40
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题目1单选题
A supercharged diesel engine增压柴油机,when compared to a similar naturally aspirated自然吸气式 diesel engine, will develop an increase in( )A. ignition lagB. engine horsepower 马力,动力C. lube oil system pressureD. specific fuel consumption
题目2单选题
Increasing the compression ratio压缩比 of a diesel engine while maintaining保持 the designed rate速率 of fuel flow will result in ( )A. increased horsepowerB. reduced efficiencyC. increased heat lossD. lower cylinder pressure
题目3单选题
The average平均的 pressure exerted on a piston during each power stroke is termed( )A. indicated horsepowerB. mean effective pressure平均有效压力C. exhaust back pressureD. compression pressure
题目4单选题
Effective horsepower有效功率 is the power developed by the( )in the cylinder,but some of this islost by friction摩擦 within the engineA. crankshaft曲轴B. crankC. connecting rod 连杆D. piston活塞
题目5单选题
Maximum 最大的pressure readings should be taken when the engine is running on( )as steadilyas possibleA. half load半负荷B. full load全负荷C. average load平均负荷D. minimum load最小负荷
题目6单选题
For the diesel engine,the operation between two fuel oil injections喷射 is called a( ),whichconsists of a fixed sequence of events固定的相序A. cycle循环B. period时期,时间段C. revolution转速D. circle
题目7单选题
The abbreviation "MIP"stands for( )A. middle indicating pressureB. mean indicated pressure平均指示压力C. mean indicated pitchD. middle indicated power
题目8单选题
Which of the listed conditions will affect the mean effective pressure mostly in the cylinders of adiesel engine?( )A. TBN of the lubricating oilB. Temperature of the lube oilC. Completeness in the mixing of the fuel and air.油气混合程度D. Temperature of the sea water
题目9单选题
If all other conditions such as bore, stroke,speed, and mean effective pressures are equal相同,a twostroke/cycle diesel engine will develop approximately( )A. the same indicated horsepower as a four-stroke/cycle engineB. twice the indicated horsepower as a four-stroke/cycle engineC. one half the indicated horsepower as a four-stroke/cycle engineD. one power stroke for every two crankshaft revolutions
题目10单选题
Which of the listed factors will indicate the most the ability of a fuel to ignite燃油燃点能力 in a diesel engine?( )A. ViscosityB. Sulfur contentC. Pour pointD. Cetane number.十六烷值
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