单选题Pyrometers commonly found on diesel engine exhaust systems, consist of（）Apyrostats and a voltmeterBa gas-filled bellows, a tube and a pressure gaugeCthermocouples and a voltmeterDammeters and thermocouples
单选题
Pyrometers commonly found on diesel engine exhaust systems, consist of（）
A
pyrostats and a voltmeter
B
a gas-filled bellows, a tube and a pressure gauge
C
thermocouples and a voltmeter
D
ammeters and thermocouples
参考解析
解析：
暂无解析
相关考题：
_____ the engines, the diesel engine is ____ used engine on boardA.Between / more commonlyB.Among / the most commonlyC.Between / not more commonlyD.Among / not the most commonly
A two stroke diesel engine exhaust temperature will be lower than a four stroke diesel engine of the same displacement because the _____. ① MEP is lower and the scavenging air is cooling the exhaust gases ② valve overlap in a four strokeA.①B.②C.① and ②D.Neither ① nor ② is correct
A bypass line provided around a waste heat auxiliary boiler in a diesel engine exhaust system, may be used to avoid boiler ______.A.corrosion at low engine loadsB.erosion at high engine loadsC.overload at high engine loadsD.scaling at all exhaust temperatures
单选题For a diesel engine, individual cylinder performance is commonly determined by exhaust gas（）Achemical analysisBback pressure readingsCpyrometer readingsDinfrared analysis
单选题White smoke issuing from the exhaust of an auxiliary diesel engine valve opening （）Athe engine is overloadedBthe engine is coldCthere is too much lube oil in the cylindersDthe turbocharger is fouled
单选题Diesel engine mufflers or silencers reduce the engine exhaust noise by （）Apassing the exhaust through long head pipesBdiffusing exhaust vibrations through activated carbon bafflesCincreasing the exhaust gas velocityDreducing the exhaust gas velocity
单选题Clogged or partially obstructed exhaust ports on a diesel engine can cause（）Aover-speeding of the engineBfailure of the engine to shut downCno effect of engine mounting boltsDhigh exhaust temperatures
单选题Excessive diesel engine back pressure may be an indication of （）Acarbon buildup in the exhaust manifoldBovercooling of the exhaust manifoldCeroded muffler baffle platesDhigh injection pressure
单选题Diesel engine exhaust noise can be reduced in an exhaust muffler by （）Achanging the direction of exhaust gas flowBincreasing the exhaust gas velocityCchanging the exhaust gas weightDincreasing the exhaust gas static pressure
单选题The exhaust system of a diesel engine is usually designed to remove exhaust gases and to （）Aprovide exhaust back pressureBprevent exhaust smoke emissionsCpower a reciprocating superchargerDmuffle exhaust gas noise
单选题The size of the exhaust valve opening is （）Amost critical in a four-stroke cycle diesel engineBmost critical in a two-stroke/cycle diesel engineCmost critical in a four-stroke/cycle diesel engine if it is turbochargedDof equal importance in a two-stroke/cycle diesel engine as in a four-stroke/cycle diesel engine
单选题Exhaust gas pyrometers are useful for（）Adetecting faulty combustion in individual cylindersBadjusting fuel racks to maintain equal loading between cylindersCadjusting the load limit setting of the governor at idle conditionsDcalculating engine horsepower
单选题The relative air pressure in the inlet manifold of a turbocharged diesel engine is usually（）Agreater than the average exhaust manifold pressureBless than the average exhaust manifold pressureCgreater at the turbine wheel than at the impellerDgreater at reduced engine speed
单选题Icreasing the exhaust valve tappet clearance of a diesel engine will result in the exhaust valve opening （）Alater and closing earlierBlater and closing laterCearlier and closing earlierDearlier and closing later
单选题In a diesel engine exhaust system, the cooling of the exhaust gases below their dew point, will result in （）Aincreased engine back pressureBsulfuric acid corrosionCsurface pitting of the turbochargerDmoisture impingement on the turbocharger compressor blade
单选题A dry-type spark arrestor removes sparks from a diesel engine exhaust by（）Aincreasing the linear velocity of the exhaust gasesBchanging directions of exhaust gas flowCdecreasing the temperature of the exhaust gasesDaccelerating the exhaust gas through a reduced size orifice
单选题A diesel engine could fail to start because of （）Aincorrect injection timingBlow exhaust back pressureCfloating exhaust valvesDexcessive cranking speed
单选题Any increase in the exhaust back pressure of a four-stroke/cycle diesel engine will （）.Areduce engine horsepower outputBaid in silencing the exhaust noiseCincrease the mean effective pressureDcontribute to effective cylinder scavenging
单选题（） the engines, the diesel engine is（） used engine on board.ABetween；more commonlyBAmong；the most commonlyCBetween；not more commonlyDAmong；not the most commonly
单选题The most common instrument used to measure diesel engine exhaust pressure is the （）ApyrometerBbourdon gaugeCpneumercatorDmanometer
单选题Diesel powered industrial trucks on a ship that are provided with safeguards to the exhaust，fuel，and electrical systems are designated（）.ADEFEBDECDSDDES
单选题Late fuel injection in a diesel engine is indicated by low firing pressure with （）Alow exhaust temperatureBlow exhaust pressureCmechanical knock in each cylinderDblack or gray exhaust smoke
单选题An indication of a diesel engine air intake being partially clogged, is （）.Alow firing pressure and low exhaust temperaturesBlow firing pressure and normal exhaust temperaturesChigh firing pressure and low exhaust temperaturesDhigh firing pressure and high exhaust temperatures
单选题If you observe smoke coming from the turbocharger of an auxiliary diesel engine, you should（）Acheck the air filter for obstructionBcheck for an exhaust leakCcheck the exhaust temperatureDsecure the engine
单选题Diesel engine cylinder head test cocks are used to （）Acheck cylinder lubricationBconnect the pressure indicator pressureCtest cylinder headsDconnect the exhaust gas pyrometers
单选题“This increase in charge air density is accomplished on most modern diesel engine types by use of exhaust gas turbo-charging, in which a turbine wheel driven by exhaust from the engine is rigidly coupled to a centrifugal type air compressor” According to this sentence, we can know that increases density（）, drives the compressor directly（）Aa modern diesel engine；a turbine wheelBa modem diesel engine；exhaust gasesCa compressor；an exhaust gas turbochargerDa compressor；a turbine wheel
单选题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 longerA(1) onlyB(2) onlyCboth (1) and (2)Dneither (1) nor (2)