Worm gear
Worm gear
相关考题：
The spur geared mooring winches have advantages over worm geared ones in .A.higher efficiency of the gear train while reversingB.the higher gear ratioC.the multi-start featureD.higher recovering speed
Whichofthefollowingstoragesolutionsattachestoaservereitherthroughafiberchannel connectionorispresentedtotheserverviaiSCSI?() A.DASB.NASC.SAND.WORM
Wear occurring at the tips of the reduction gear teeth is usually the result of ______.A.surface fatigueB.fretting corrosionC.heavy overloadingD.gear misalignment
控制面板显示EnvTem、GeaOilLev表示：（）A、Gear oil lev switch、Environ temperatureB、Gear oil level、Environment temperatureC、Gear oil level switch、Environment temperatureD、Gear oil level switch、Environment temp
单选题The spur geared mooring winches have advantages over worm geared ones in（）Ahigher efficiency of the gear train while reversingBthe higher gear ratioCthe multi-start featureDhigher recovering speed
单选题An advantage of a helical gear pump over a simple gear pump is that the helical gear pump is capable of （）.Amaintaining a steadier speedBdelivering liquids over greater distancesCoperating for longer periods of timeDproducing a smoother discharge flow
单选题Which of the following is NOT true according to the passage?（）ABoth the main steering gear and the auxiliary steering gear should be operatedBThe alarms fitted to the remote control system should be operatedCThe emergency generator compartment should be checkedDThe communication system between the bridge and the steering gear compartment should be operated
单选题A vessel is “engaged in fishing” when（）.Aher gear extends more than 100 meters from the vesselBshe is using any type of gear，other than linesCshe is using fishing apparatus which restricts her maneuverabilityDshe has any fishing gear on board
单选题Before starting the turning gear, （） should be worked by hand to minimize corrosive action on the liners.Athe indicatorsBthe starting valvesCthe cylinder lubricatorsDthe turning gear
单选题（） for the camshaft gear train is taken from a spur gear which for a six cylinder engine is at the coupling end.AThe driven gearBThe driveCThe greaseDThe lubricating oil
单选题Worm geared automatic mooring winches are （） as the multi-start feature reduces the advantage of worm gear iethe high gear radio.ApopularBcommonCin lead positionDuncommon
单选题Pitting in the area close to the pitch line and on the same end of each gear tooth of a reduction gear unit would be caused by （）Acorrosion on the gearsBexcessive gear speedCdirt in the oilDmisalignment of the gears
单选题Some medium and high-speed diesel engines require reduction gear units to provide a useful propeller speedIn most reduction gears, the bull gear（）Amust churn the oil in the sumpBis connected to the propeller shaftCis driven at the highest RPMDcompensates for alignment variations between the engine and pinion gear
单选题The safe working load for the assembled cargo gear and the minimum angle to the horizontal for which the gear is designed shall be marked on the（）.AdeckBhead of the boomCheel of the boomDmast or king post
单选题With reference to operating a four-ram steering gear system under emergency conditions, which one of the following statements is incorrect?（）AOnly one pump should be used at any timeBThe ship speed should be reduced to 70% of the normalCWatch keeping of the steering gear should be increasedDLimitations of the steering gear should be logged but the bridge need not be informed
单选题With reference to rules governing steering gear, which one of the following rules is incorrect? （）AIt is required that all ships are provided with two independent steering gear systems that is one main and one auxiliaryBThe auxiliary gear could be power operated in passenger shipsCThe auxiliary gear must be of adequate strength and sufficient to steer a ship at navigable speedDAll moving parts of the steering gear must be guarded against any possible damage