单选题Diesel engine electric starting motors generally require heavier duty motors and motors and operate at higher voltages than comparable starting motors for gasoline engines due to（）Ahigher speed requiredBflywheel-effectClower starting temperaturesDhigher compression pressures
单选题
Diesel engine electric starting motors generally require heavier duty motors and motors and operate at higher voltages than comparable starting motors for gasoline engines due to（）
A
higher speed required
B
flywheel-effect
C
lower starting temperatures
D
higher compression pressures
参考解析
解析：
暂无解析
相关考题：
Diesel engine electric starting motors generally require heavier duty motors and motors and operate at higher voltages than comparable starting motors for gasoline engines due to _____________.A.higher speed requiredB.flywheel-effectC.lower starting temperaturesD.higher compression pressures
In an operating diesel engine, which of the following conditions is an indication of a leaking air starting valve?A.Noise coming from that air starting valveB.Continuous operation of the starting air compressorC.Zero air pressure in the air starting systemD.Overheated starting air pipe to the cylinder head
单选题The starting of a marine diesel engine is generally carried out with the assistance of （）.Acompressed airBelectricityChydraulic oilDcompressing air
单选题Stating a large propulsion diesel engine using diesel fuel during cold weather conditions can be made easier by （）Aincreasing the quantity of starting airBincreasing the lube oil pressureCheating the engine fuel supplyDheating the engine jacket water
单选题Generally speaking，the fuel injected into a marine diesel engine combustion chamber is ignited by（）.Aspark plugsBglow plugsCheat of compressionDa magneto
单选题Diesel engine starting difficulties due to cold intake air temperatures, can be overcome by using a/an（）Aincrease in starting air pressureBincrease in lube oil viscosityCcompression expansion deviceDjacket water heater
单选题Before starting a diesel engine that has an engine driven lube oil pump, the engineer should （）.Aopen the bypass lineBcut in the lube oil coolerCpressurize the lube oil systemDtop off the expansion tank
单选题Diesel engine cylinder head test cocks are used to（）Acheck cylinder lubrication prior to starting engineBconnect exhaust gas analyzers to determine engine efficiencyCpressure test cylinder heads to check for leaksDremove moisture accumulations from cylinder prior to starting
单选题Starting a large low-speed propulsion diesel engine on diesel fuel during cold weather conditions, will be made easier by （）Aincreasing the quantity of starting airBincreasing the lube oil pressureCheating the engine fuel supplyDheating the engine coolant
单选题Diesel engine electric starting motors generally require heavier duty motors and motors and operate at higher voltages than comparable starting motors for gasoline engines due to（）Ahigher speed requiredBflywheel-effectClower starting temperaturesDhigher compression pressures
单选题In a diesel engine, blow-by is generally the result of worn（）Avalve guidesBoil control ringsCvalve seatsDcompression rings
单选题Proper lubrication of the main bearing is more easily obtained in a single acting four-stroke/cycle diesel engine than in a single acting two-stroke/cycle diesel engine because （）Abearing pressure in a four-stroke/cycle acting single diesel engine is continually reversedBbearing pressure in a two-stroke/cycle single acting diesel engine is continually reversedCthe maximum bearing pressure is higher in a single acting two-stroke/cycle diesel engineDtwo-stoke/cycle diesel engines require more complicated lubrication piping
单选题The is employed to warm up a large diesel engine before its starting（）Ahot airBhot boiler waterCcylinder waterDhot seawater
单选题Cold weather starting of a diesel engine may be made easier by（）Adecreasing the compression ratioBusing a special fuel having a high ignition temperatureCincreasing the starting air supplyDheating the jacket water
单选题A large two-stroke/cycle direct reversing diesel engine is to be reversedPrior to the admission of starting air you must （）Aline up the engine fore restarting with light diesel oilBreposition the fuel injection camCchange the intake and exhaust valve cam positionsDplace the starting cam in the intermediate position
单选题Prior to starting, the purpose of turning over a main propulsion diesel engine with the cylinder test cocks open, is to （）Atest the starting systemBremove condensation from the cylindersCcheck the compressionDcheck for proper lube oil pressure
单选题A two-stroke/cycle diesel engine requires less starting air than a four-stroke/cycle diesel engine, of equal displacement, because the two-stroke/cycle diesel engine（）Ahas little or no internal frictionBhas a lower effective compression ratioCoperates with scavenge air under a positive pressureDoperates without energy absorbing intake and exhaust strokes
单选题A diesel engine cranks properly during starting but immediately stallsWhich of the following systems is most likely at fault?（）AHydraulic startingBElectric startingCIgnitionDFuel
单选题An electric heater built into some smaller diesel engines is used to （）.Araise lube oil viscosity for easier starting in cold weatherBincrease air inlet temperatureCincrease compression ratioDincrease jacket water temperature for easier starting in cold weather
单选题The overspeeding of the diesel engine driving an electric generator could cause （）.Alow voltage trip to tripBreverse power trip to tripCdamage to windingsDexcessive exhaust temperatures
单选题Overspeed of the diesel engine driving an electric generator could cause（）.Alow voltage tripBreverse power tripCdamage to windingsDexcessive exhaust temperatures
单选题Universal motors will operate on AC or DC current, and are generally found in （）Aportable toolsBlarge pump motorsCturbo electric main motorsDforced draft fans
单选题When starting air is admitted, a diesel engine turns over very slowly without firingThe cause may be （）Aan obstruction in an cylinderBwater accumulation in some engine cylindersClow starting air pressureDlow scavenge air pressure
单选题The most common forms of main drive used on deck auxiliaries are （）.Asteam plants, electric motors and compressed airBdiesel engine, hydraulic machinery and compressed airCsteam plants, electric motors and hydraulic machineryDdiesel engines, steam plants and hydraulic machinery
单选题In an operating diesel engine, which of the following condition is an indication of a leaking air starting valve?（）Anoise coming from that air starting valveBcontinuous operation of the starting air compressorCzero air pressure in the air starting systemDoverheated starting air pipe to the cylinder head
单选题The highest pressure in a diesel engine cylinder normally occurs （）.Aat TDCBbefore TDCCafter TDCDduring air starting
单选题The diesel engine must be started before it can run by it self For this purpose （） has to be used.Aa starting systemBthe starting airCa starting operationDA, B and C
单选题A six-cylinder, two-stroke/cycle diesel engine is fitted with a rotary distributing air starting systemThe speed of the rotating distributor disc is （）Aone-half engine speedBthe same as engine speedCtwice engine speedDfour times engine speed