单选题With() the engine need not to be aligned with reduction gears or propeller shaft.ADiesel engine propulsionBDiesel electric propulsionCSteam engine propulsionDGas turbine propulsion

单选题
With() the engine need not to be aligned with reduction gears or propeller shaft.
A

Diesel engine propulsion

B

Diesel electric propulsion

C

Steam engine propulsion

D

Gas turbine propulsion


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One of the most common causes of reduction gear failure is gear wear caused by scoring as a result ofA.surface fatigue of the gearsB.an inadequate lube oil filmC.plastic flow of the gearsD.fretting corrosion from water

Pitted reduction gear teeth having a deep blue color with evidence of overheating have been operated with _______.A.excessive speedB.improper warm-upC.extreme misalignmentD.inadequate lubrication

Wear occurring at the tips of the reduction gear teeth is usually the result of ______.A.surface fatigueB.fretting corrosionC.heavy overloadingD.gear misalignment

单选题Defective timing gear in a diesel engine may lead to ().Asmoky exhaustBstarting failureCoverloadDover speed

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单选题When transmitted by a reduction gear, diesel engine speed is reduced and the torque available for work ()Aremains the sameBis reducedCis increasedDis eliminated

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