Black smoke exhausting from an operating diesel engine can be caused by （）
A . fuel dribbling from leaking fuel injectors
B . burning fuel with a high carbon content
C . burning fuel with a high vanadium content
D . burning fuel with a lower sulphur content
相似题目
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The exhaust boilers are used to recover some of （） carried in the exhaust gas from the main engine.
A . water
B . oil
C . heat
D . steam
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White smoke exhausting from a diesel engine can be caused by （）
A . low combustion temperature
B . a leaking fuel nozzle check valve
C . late fuel injection
D . plugged oil-scraper ring hole
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Engine operating conditions may be indicated by the color of the exhaust smoke.Black smoke could indicate（）
A . an insufficient speed droop setting
B . an overloaded engine
C . clogged drain holes in the oil control rings
D . complete combustio
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A：Can I buy two or three cards fro meachset？B：Oh，sorry，Wesellitby（）.
A . A、singly
B . B、apiece
C . C、set
D . D、sets
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White smoke exhausting from an operating diesel engine may indicate （）.
A . a cracked liner
B . burning lube oil
C . an overloaded engine
D . insufficient combustion air
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A smoking exhaust from an operating diesel engine could be caused by （）
A . low sulfur content in the fuel
B . a loose injector inlet connection
C . late fuel injection
D . high injection pressure
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Black smoke exhausting from an operating diesel engine is an indication of poor combustion which may be caused by （）
A . water in the fuel
B . insufficient fuel for combustion
C . clogged air intake passages
D . burning lubricating oil
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A two-stroke diesel engine exhaust temperature will be lower than a four-stroke diesel engine of the same displacement because the （） (1) scavenging air is cooling the exhaust gases (2) exhaust cycle time is longer
A . (1) only
B . (2) only
C . both (1) and (2)
D . neither (1) nor (2)
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Black smoke exhausting from a diesel engine indicates（）
A . proper fuel injection
B . water in the fuel
C . incomplete combustion
D . burning of lube oil
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In a diesel engine exhaust system, the cooling of the exhaust gases below their dew point, will result in （）
A . increased engine back pressure
B . sulfuric acid corrosion
C . surface pitting of the turbocharger
D . moisture impingement on the turbocharger compressor blade
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A diesel engine emits blue exhaust smoke as a result of（）
A . cold intake air
B . excessive compression pressure
C . excessive cylinder lubrication
D . a light load
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A four-stroke cycle, turbocharged, 1000 horsepower diesel engine has been operating under loadThe load suddenly increases, causing excessive black exhaust smoke, and a rapid rise in the lube oil temperatureIn response to this condition, you should:（）
A . reduce load
B . check your exhaust
C . adjust cooling water temperature
D . increase lube oil flow
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Leaky exhaust valve will result in which of the following?（） (1) high exhaust temperature; (2) low compression pressure; (3) low firing pressure.
A . (1) and (2)
B . (1) only
C . (2) only
D . (1),(2) and (3)
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热衰竭(heat exhaustion)
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Exhaust gas pyrometers are useful for（）
A . detecting faulty combustion in individual cylinders
B . adjusting fuel racks to maintain equal loading between cylinders
C . adjusting the load limit setting of the governor at idle conditions
D . calculating engine horsepower
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Diesel engine exhaust noise can be reduced in an exhaust muffler by （）
A . changing the direction of exhaust gas flow
B . increasing the exhaust gas velocity
C . changing the exhaust gas weight
D . increasing the exhaust gas static pressure
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A diesel engine experiences a sudden loss in speed, accompanied by black exhaust smoke, with the fuel rack at maximum, and speed remaining below normal the probable（）
A . engine overload
B . leaky valves
C . stuck or broken piston rings
D . low air injection pressure
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______, I rock to and fro on the swing. I'm feeling lonely. I wish I had someone to play with.
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英译汉：He stopped smoking.英译汉：He stopped smoking.
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设循环队列的结构如题33。若有一个Queue类型的队列Q，计算队列元素个数应该用（34)。A．（Q.rear-Q.fro
设循环队列的结构如题33。若有一个Queue类型的队列Q，计算队列元素个数应该用(34)。
A．(Q.rear-Q.front+ MaxSize)%MaxSize；
B．Q.rear-Q.front+1；
C．Q.rear-Q.front-1；
D．Q.rear-Qfront；
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判断一个顺序存储的队列sp为空的条件是（)。A.sp->front=sp->rearB.sp->front=sp->rear+1C.sp->fro
判断一个顺序存储的队列sp为空的条件是()。
A.sp->front=sp->rear
B.sp->front=sp->rear+1
C.sp->front=sp->rear-1
D.sp->front=NULL
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根据所听到的内容作答_____。 A)Smoking helps to lessen the pressure． B)Smoking helps him fall asleep quickly． C)He can get much happiness from smoking． D)Smoking brings more chances to make friends．
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exhaust（）
A．布料，织物
B．使筋疲力尽；耗尽
C．打破，破碎；缝隙
D．求婚
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______, I rock to and fro on the swing.I’m feeling lonely.I wish I had someone to
A．A.I&39;m feeling lonely.I wish I had someone to play wit
B．B.Joyfully
C．C.Listlessly
D．D.Anxiously
E．E.Delightedly
