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燃料比功率 fuel specific power
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在OMC上“Cell-specific Reference Signals Power”具体是指()A.基站每个天线口上承载的有效RS在单个RE上的功率B.有RS的时域符号上RS的功率和C.RSRPD.每个小区RS的总功率
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Which factor determines the ring dam size for a fuel oil, tubular bowl type, centrifugal purifier?A.The viscosity of the fuel.B.The quantity of water to be removed from the fuel.C.The specific gravity of the fuel.D.The quantity of dirt to be removed from the fuel.
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A ship which is required to carry an Oil Record Book must log in the book ______.A.discharge of ballast or cleaning water from fuel tanksB.sounding levels of all fuel tanks on a daily basisC.the grade and specific gravity of all fuel oil carriedD.fuel consumption rates on a weekly basis
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What quality of a diesel fuel is most significant for efficient combustion ________．A.VolatilityB.ViscosityC.Flash pointD.Specific heat
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在OMC上“Cell-specific Reference Signals Power”具体是指（）A、基站每个天线口上承载的有效RS在单个RE上的功率B、有RS的时域符号上RS的功率和C、RSRPD、每个小区RS的总功率
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测试功能分为哪几类（）A、POWER UP TEST，CYCLIC TEST两类B、POWER UP TEST，CYCLIC TEST，SPECIFIC TEST三类C、POWER UP TEST，CYCLIC TEST，SYSTEM TEST，SPECIFIC TEST四类
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单选题Heavy residual fuel oils are heated prior to centrifuging to （）A
reduce fuel weightB
increase specific gravityC
separate fuel from lube oilD
reduce fuel viscosity
考题
单选题The percentage of impurities in a specific fuel oil sample is determined by （）.A
settling in a fuel tankB
testing in a laboratory centrifugeC
burning in a calorimeterD
testing in a closed cup
考题
单选题A ship which is required to carry an Oil Record Book must log in the book（）.A
discharge of ballast or cleaning water from fuel tanksB
sounding levels of all fuel tanks on a daily basisC
the grade and specific gravity of all fuel oil carriedD
fuel consumption rates on a weekly basis
考题
单选题A vessel is required to carry an Oil Record Book Part I to log entries in the book regarding the （）.A
discharge of ballast or cleaning water from fuel tanksB
sounding levels of all fuel tanks on a daily basisC
grade and specific gravity of all fuel oil cardedD
fuel consumption rates on a weekly basis
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单选题You are transferring fuel from the storage tanks to the day tanks by means of an electric fuel oil transfer pumpIf the pump motor catches fire, you would FIRST （）.A
secure the fuel manifoldB
shut off power to the pumpC
shut off the power ventilationD
spray water on the fire
考题
单选题The specific gravity of fuel oil is a （）.A
absolute valueB
relative valueC
constant valueD
set value
考题
单选题The engine has one or two group of fuel pumps, depending upon （）.A
the number of fuel valvesB
the number of cylindersC
the speed of engineD
the power of engine
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单选题The term “proper metering”, as applied to a diesel fuel injection system, can be best defined as （）.A
delivering the same quantity of fuel to each cylinder for each power stroke according to engine loadB
maintaining the metering adjustment for a reasonable period under all load conditionsC
timing fuel injection to obtain maximum power and good fuel economyD
distributing the fuel to all parts of the combustion chamber for proper combustion
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单选题A distorted spray pattern from a fuel injector can cause a diesel engine to have （）A
higher firing pressureB
more power outputC
lower fuel pressureD
less power output
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单选题Significant retardation of a diesel engine fuel injection timing will result in （）A
smoother engine operationB
advanced fuel ignitionC
increased fuel economyD
reduced engine power
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单选题A diesel engine will lose power if fuel injection occurs too late in the cycle, because the（）A
fuel droplets will burn as they leave the fuel injectorB
fuel will not be properly atomized in the cylinderC
maximum expansion of the burned fuel cannot take place in the cylinderD
compression pressure will be too low to cause fuel ignition
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单选题The heart of the diesel engine is the （） where the fuel is burnt and the power developed.A
crankcaseB
cylinderC
scavenge boxD
piston
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单选题Air in the fuel lines to the fuel injection nozzles of a diesel engine will cause the engine to （）A
burn excessive amounts of lube oilB
overheat without smokingC
operate with reduce power or stopD
run away without load
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