单选题With one or more cylinders out of operation, the engine speed must be reduced because（）Ain such cases, the air supply is no longer optimal, the thermal load will be higherBgovernor hunting will occurCtorsional vibrations as other mechanical vibrations may occurDall of the above are correct
单选题
With one or more cylinders out of operation, the engine speed must be reduced because（）
A
in such cases, the air supply is no longer optimal, the thermal load will be higher
B
governor hunting will occur
C
torsional vibrations as other mechanical vibrations may occur
D
all of the above are correct
参考解析
解析：
暂无解析
相关考题：
Point out which one of the following items is not in the charge of Chief Officer in repairing operation. ______.A.hull cleaningB.derusting and paintingC.the maintenance of boilerD.docking and undocking
You are subneting in the network， out of network address，what’s feature can add one more address？
单选题Mechanical lubricators for diesel engine cylinders are usually small reciprocating pumps which are （）.Aoperated manually once an hourBoperated until the engine has startedCplaced into operation only at maximum loadDadjustable to meet lubrication requirements
单选题Which one is NOT the ‘clear grounds’ for a more detailed inspection?（）Aabsence of engine log bookBserious corrosion on the hullCone page missing in the oil record bookDpaint peeling off some tailings in engine rooms
单选题Fuel oil is thought to be one of the main factors （） the operation and maintenance of an engine.Ahave nothing to do withBhaving nothing to do withChave much to do withDhaving much to do with
问答题You are subneting in the network， out of network address，what’s feature can add one more address？
单选题We took usual steps:sounding the depth，reversing and stopping engine，paying out anchor and 60 fathoms of chain cable in the depth of 12 fathoms．The operation above is（）.AberthingBsearchingCanchoringDpicking up pilot
单选题During the PSC inspection, under the provisions of SOLAS 74, which one may not be regarded as clear grounds for ships’ detainment?（）Afailure of the proper operation of emergency generatorBinsulation of piping including exhaust pipes in engine room contaminated by oilCimproper operation of bilge of bilge of bilge pumping arrangementsDdamaged sanitary pump
单选题Water lubricated tailshaft bearings wear,（）Athe after one is more than forward oneBthe forward one is more than after oneCthe forward one is the same with after oneDit depends on the type of engine
单选题Following the failure of one turbocharger on a large, crosshead, main propulsion diesel engine, fitted with multiple turbochargers, which of the following actions should be taken prior to further operation of the engine? （）ABlank off the exhaust gas inlet to the damaged turbochargerBSecure cooling and lubrication to the damaged turbochargerCLock the rotor of the damaged turbochargerDAll of the above
单选题（） in what position the engine stops there will always be at least one of the cylinders with its starting air valve open to admit compressed air to start the engine.ABecauseBOwing toCForDNo matter
单选题Large, two-stroke/cycle, main propulsion, diesel engine cylinders can be successfully pressure charged during normal operation, by using the （）.Aexhaust gas temperature systemBexhaust load systemCconstant or pulse pressure systemDconstant volume system
单选题It is often necessary to put an engine into （） service with one or more cylinders cut out, or with a turbocharger secured.AadditionalBpermanentCtemporaryDlong
单选题The quality of the fuel oil and lube oil （）, Im afraid.Ahas much to do with the operation of the engine and its lifeBhave much to do with the operation of the engine and its lifeChas much doing with the operation of the engine and its lifeDhave much doing with the operation of the engine and its life
单选题In today’s practice, with cylinders of equal diameter of bore and equal revolutions, the two-cycle engine delivers a power about 80 percent （） than that of the four-stroke one.AgreaterBbetterCsmallerDless
单选题A faulty injection in one cylinder of an operating diesel engine can be located by （）Acutting out individual injectors and noting engine performanceBchecking lube oil temperatureCchecking cam positionDusing a timing light
单选题Exhaust pyrometer readings provide an indication of the （）Aeffectiveness of water-cooled exhaust elbowsBdistribution of the load between engine cylindersCamount of fuel penetration into the engine cylindersDindicated horsepower of the engine cylinders
单选题Which of the listed pre-start procedures should be carried out prior to starting a crosshead type diesel engine after an overhaul?（）APre-lube cylinders with hand cranksBOpen all air space drain cocksCOpen all indicator valvesDAll of the above
单选题For one or two types of engine, the piston and rod can be withdrawn downwards from the cylinder into the crankcase and then out through the （）.Acylinder casingBcylinder boreCcrankcase doorDaperture in the cylinder block
单选题During the PSC inspection, under the provisions of SOLAS 74, which one may not be regarded as clear grounds for ships’ detainment?（）Afailure of the proper operation of the main steering gearBfailure of the proper operation of electrical installationsCleakage of domestic water pumpDinsulation of exhaust pipes in engine room contaminated by oil
单选题One of the differences between a two-stroke engine and a four-stroke engine is,（）Aa two-stroke engine works without exhaust operationBa two-stroke engine works without compression strokeCa two-stroke engine works without expansion strokeDa two-stroke engine works without suction operation
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Which is false about engine trials?（）Aengine trails should be done after finishing the operation of turning the engine with the turning gear and starting the engine on air brieflyBin the operation of engine trails, the main engine should be running in low-speedCAs to the ship equipment with twin main engine, engine trials should be done with one engine ahead and another engine astern at the same timeDthe order “engine trials” should be given by the bridge
单选题A common rail engine has only one or two high pressure pumps in operation at the same（）time, and the injection into each cylinder.Acan’t be controlled very preciselyBcan’t be controlled as flexibly as the separate pump systemCcan be controlled as flexibly as the separate pump systemDcan be controlled more precisely and flexibly
单选题When one cylinder has a lower compression pressure and higher exhaust gas temperature than any of the other engine cylinders, which of the conditions listed will indicated?（）AAdvanced ignitionBClogged air intakeCLeaky exhaust valveDHigh exhaust pressure
单选题Point out which one of the following items is not in the charge of Chief Officer in repairing operation（）.Ahull cleaningBderusting and paintingCthe maintenance of boilerDdocking and undocking
单选题Which statement concerning an automatic towing engine is FALSE? （）AIt automatically maintains tow line tensionBIt prolongs the life of the hawser by distributing chafing as the hawser is paid out and taken inCAs tension on the hawser increases，more line is taken in by the automatic towing engineDAs tension on the hawser decreases，more line is taken in by the automatic towing engine