单选题（） the oxygen content in the exhaust gas, （） the combustion is.AThe lower；the worseBThe higher；the betterCThe lower；the betterDThe highest；the worst
单选题
（） the oxygen content in the exhaust gas, （） the combustion is.
A
The lower；the worse
B
The higher；the better
C
The lower；the better
D
The highest；the worst
参考解析
解析：
暂无解析
相关考题：
The effect that exhaust gas recirculation can reduce NOX formation is partly due to a reduction of the()concentration in the combustion zone and partly due to the content of water and carbon dioxide in the exhaust gas.A.OxygenB.NitrogenC.SulphurD.Freon
If the exhaust gas temperature of the incinerator is too high, or if sparks are developed, What should you do? A.Close the inlet and outletvalves for diesel oilB.Open the air nozzles in the secondary combustion chamber until it stopsC.Open the air nozzles in the primary combustion chamber until it stopsD.Close inlet valve for pressurized air
Exhaust gas pyrometers are useful forA.detecting faulty combustion in individual cylindersB.adjusting fuel racks to maintain equal loading between cylindersC.adjusting the load limit setting of the governor at idle conditionsD.calculating engine horsepower
A dry-type spark arrestor removes sparks from a diesel engine exhaust by ____.A.increasing the linear velocity of the exhaust gasesB.changing directions of exhaust gas flowC.decreasing the temperature of the exhaust gasesD.accelerating the exhaust gas through a reduced size orifice
What is used to test a tank for oxygen content ________．A.Combustible gas indicatorB.Vapor indicatorC.Atmosphere analyzer kitD.None of the above
Which statement about entering into a tank which has been sealed for a long time is TRUE ________．A.The tank should be tested only once to ensure the oxygen content is at least 14% before entryB.The tank must be tested at frequent intervals to ensure that hazardous gasses have not regeneratedC.The tank need not be tested for oxygen content if it is ventilated for more than 24 hoursD.If the oxygen content tests at less than 12% you should wear an approved gas mask
Which of the listed functions is the purpose of a gas scrubber in an inert gas generation system ________．A.Cools the inert gasB.Maintains the oxygen content at 5% by volumeC.Drains off static electricity in the inert gasD.Maintains the water seal on the gas main
Inerting means ______．A.The introduction of inert gas into a tank with the object of reducing the oxygen content to below 8% by volumeB.The introduction of inert gas into a gas free tank for the purpose of reducing the oxygen content to below 8% by volumeC.The introduction of inert gas into a cargo tank during cargo discharge to replace the volume of discharged cargoD.All of the above
Using an inert gas system on a tanker has which advantage（s）________．A.Provides for faster loadingB.Lowers oxygen content in the tankC.Provides better fuel economyD.All of the above
Which statement about the inert gas system is TRUE ________．A.Boiler soot blowers should never be used when the IG system is operatingB.The boiler will produce the best quality of flue gas for the IG system when the boiler load is very lightC.The boiler will produce the most quantity of flue gas for the IG system when the boiler load is very lightD.Flue gas with excessive oxygen content is de-oxygenated in the scrubber
An inert gas system is designed to reduce the possibility of tank explosions by ______.A.eliminating sparks and fire in the vicinity of cargo tanksB.removing all hydrocarbon gases from the cargo tanksC.blanketing cargo tanks with inert foamD.reducing the oxygen concentration below levels necessary for combustion
Deficient oxygen content inside a chain locker can be detected with ______.A.litmus paperB.a combustible gas indicatorC.an oxygen breathing apparatusD.an oxygen indicator
单选题Using an inert gas system on a tanker has which advantage(s)? （）AProvides for faster loadingBLowers oxygen content in the tankCProvides better fuel economyDAll of the above
单选题An exhaust gas bypass is installed on a waste heat boiler in order to （）.Abypass exhaust gas at high loads to prevent excessive back pressureBbypass a portion of the exhaust gas at peak loads for better efficiencyCrecycle exhaust gas to the turbochargerDminimize moisture condensation in the boiler gas passages at low loads
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An inert gas system is designed to reduce the possibility of tank explosions by（）.Aeliminating sparks and fire in the vicinity of cargo tanksBremoving all hydrocarbon gases from the cargo tanksCblanketing cargo tanks with inert foamDreducing the oxygen concentration below levels necessary for combustion
单选题When would the available energy of the exhaust gases of a two-stroke/cycle diesel engine be insufficient to drive an exhaust gas turbocharger, resulting in the incorrect amount of air for combustion?（）ADuring operation at low speedBDuring operation at rated speed, but low power outputCDuring accelerationDAll of the above
单选题Gas exchange, which is a basic part of the cycle of an internal combustion engine, is（）Athe supply of normal air and removal of compressed airBthe supply of fuel oil and combustion of the atomized oilCthe supply of fresh air and removal of exhaust gasesDthe supply of fresh air and removal of the extra heat
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Deficient oxygen content inside a chain locker can be detected with（）.Alitmus paperBa combustible gas indicatorCan oxygen breathing apparatusDan oxygen indicator
单选题A combination combustible gas and oxygen indicator is an instrument that measures the（） of both combustible gas and oxygen; each is indicated on a separate meter.ApurifiesBcombinationsCconcentrationsDfilters
单选题Inerting means（）.Athe introduction of inert gas into a tank with the object of reducing the oxygen content to below 8% by volumeBthe introduction of inert gas into a gas free tank for the purpose of reducing the oxygen content to below 8% by volumeCthe introduction of inert gas into a cargo tank during cargo discharge to replace the volume of discharged cargoDAll of the above
单选题SOLAS regulations require that the inert gas system shall be capable of delivering inert gas with an oxygen content of not more than what percentage?（）A5%B8%C6%D3%
单选题Deficient oxygen content inside a chain locker can be detected with（）.Alitmus paperBcombustible gas indicatorCoxygen breathing apparatusDoxygen indicator
单选题What is used to test a tank for oxygen content?（）ACombustible gas indicatorBVapor indicatorCAtmosphere analyzer kitDNone of the above