单选题Cylinders of marine diesel engines are normally cooled by （）.Asea waterBfine mineral oilCsanitary waterDfresh water
单选题
Cylinders of marine diesel engines are normally cooled by （）.
A
sea water
B
fine mineral oil
C
sanitary water
D
fresh water
参考解析
解析：
暂无解析
相关考题：
Each cylinder liner on the marine medium speed engines _____.A.is usually cooled by sea waterB.can be replaced when worn outC.is in direct contact with the water in the bore of the cylinderD.can t expand when heated
Diesel engines are started by supplying into the cylinders in the appropriate sequence for the required direction.A.cooling waterB.compressing airC.compressed airD.cylinder oil
A sudden power loss from a turbocharged and after-cooled diesel engine is an indication of a/anA.turbocharger malfunction or failureB.crankcase exhauster overloadC.overload on the intercoolerD.obstruction in the engine cylinders
Diesel engines are started by supplying_____into the cylinders in the appropriate sequence for the required direction.A.cooling waterB.compressing airC.compressed airD.cylinder oil
Cylinders of marine diesel engines are normally cooled by ___ .A.sea waterB.fine mineral oilC.sanitary waterD.fresh water
Modern marine diesel engines equipped with mechanical fuel injection operate on a combustion phase within the cycle which is ______.A.entirely constant pressureB.entirely constant temperatureC.a combination of constant volume and constant pressureD.a combination of constant temperature and constant pressure
单选题The marine diesel engine is a type of diesel engine used on ships The （） of its operation is not very difficult to understand.AprincipleBprincipalCcauseDcase
单选题In large marine diesel engines cylinder oils usually contain additives formulated to impart the （） to clean the rings and grooves.AinefficiencyBoilinessCdetergencyDpurity
单选题Which of the following will be the function of lubricating oil used in marine engines?（）Ato remove heat from oil cooled pistonsBto wash away wear detritusCto neutralize acidic productsDall of the above
单选题The majority of medium speed and high speed marine diesel engines for main or auxiliary drive operate on the （） cycle.Atwo-strokeBfour-stokeClong-strokeDshort-stroke
单选题Each cylinder liner on the marine medium speed engines （）.Ais usually cooled by sea waterBcan be replaced when worn outCis in direct contact with the water in the bore of the cylinderDcan t expand when heated
单选题Marine four-stroke diesel engines are mainly （）.Aof crosshead typeBof trunk piston typeCof low speed typeDall the above
单选题（）, so they are widely used on board ship nowadays.ADiesel engines have more advantages in comparison with gasoline enginesBDiesel engines have more advantages in comparison to gasoline enginesCGasoline engines have more advantages in comparison with diesel enginesDGasoline engines have more advantages in comparison to diesel engines
单选题Before a marine diesel engine is started the cylinders and pistons must be （）.Acooled to appropriate temperatureBwarmed up gradually to appropriate temperatureCopened up and renewedDground and polished
单选题Cooling water pumps driven by direct reversing diesel engines are usually of the straight impeller vane type pump with a concentric housing to（）Afacilitate bi-directional operationBprovide the greatest pump efficiencyCprevent pump clogging from marine growthDprevent cavitation at the pump outlet
单选题One method of constructing large marine diesel engines and reducing the total engine frame weight is through （）.Acasting interlocking componentsBwelding plates to form sections for assemblyCforging integral componentsDcase hardening integral components
单选题A sudden power loss from a turbocharged and after-cooled diesel engine is an indication of a/an（）Aturbocharger malfunction or failureBcrankcase exhauster overloadCoverload on the intercoolerDobstruction in the engine cylinders
单选题（）diesel engines generally have two systems of lubrication:（）a total loss system feeding and a circulating system lubricating the running gear and cooling the pistons.ALarge crosshead type；crossheadsBHigh speed；the cylindersCLarge crosshead type；the cylindersDFour-stroke；pistons and cylinders
单选题（） providing lubricating films, oil used in marine diesel engines have to remove heat from oil cooled piston.AExcept forBBesideCExceptDIn addition to
单选题（）uses one or two high pressure pumps for all the cylinders with one more standby, while（）have a separate high-pressure pump for each cylinder.AA common rail engine；conventional enginesBA conventional engine；common rail enginesCA marine diesel engine；most other enginesDA two-stroke engine；four-stroke engines
单选题Diesel engines are started by supplying （） into the cylinders in the appropriate sequence for the required direction.Acooling waterBcompressing airCcompressed airDcylinder oil
单选题The marine bill of lading normally issued by （）.AtheshipownerBthecarrierCtheshipperDtheconsigner
单选题The marine bill of lading normally issued by （）.Athe shipownerBthe carrierCthe shipperDthe consigner
单选题Pistons of marine medium speed diesel engines may be made of （） in order to keep the weight down for balancing purpose at high speed.AleadBforged steelCalloy steelDaluminum alloy
单选题Modern marine diesel engines using mechanical fuel injection, operate on a combustion cycle which is（）Aa combination of constant volume and constant pressureBa combination of constant temperature and constant pressureCentirely constant pressureDentirely constant volume
单选题Modern marine diesel engines equipped with mechanical fuel injection operate on a combustion phase within the cycle which is（）Aentirely constant pressureBentirely constant temperatureCa combination of constant volume and constant pressureDa combination of constant temperature and constant pressure
单选题Some diesel engines are fitted with a thermometer in the cooling water outlet from each cylinderIf the cooling water temperature from all cylinders begins to rise above normal, you should suspect （）Aincrease blow-by in all cylindersBincomplete combustion in all cylinderCoverloading in all cylindersDinsufficient fuel delivery to all cylinders