In some designs the cylinder oil is timed so that the oil injects only on the （）.

[单选题]In the sentence “In some designs the cylinder oil is timed so that the oil injects only on the piston ring belt, the "piston ring belt" means （）.A . piston crownB . piston ring grooveC . piston skirtD . piston ring area

[单选题]Oil is supplied to the cylinder wall and （） by means of mechanical lubricators.A . the cylinder coverB . the piston ringsC . the piston crownD . the piston skirt

[单选题]In addition to lubricating, cylinder oil assists in forming a gas seal and contains （） which clean the cylinder liner.A . additivesB . waterC . greaseD . acid solutio

[单选题]The rate of cylinder lubricating oil metered to each cylinder of a large low-speed main propulsion diesel engine is （）A . the same, whether at sea, or during maneuveringB . adjusted during each hour of operation while at constant RPMC . higher at sea

[单选题]Cylinder lubrication oil for low speed main propulsion diesel engines is admitted to each cylinder during （）.A . the power strokeB . the compression strokeC . low load operation onlyD . periods of standby

[单选题]Cylinder wall temperature, fuel oil supplier, and oil passage （）.A . are interdependentB . are not interdependentC . have nothing to do with each otherD . are independent

[单选题]Somepeoplebelievethatsinceoilisscarce,the____ofthemotorindustryisuncertain.A．)terminalB)benefitC)fateD)estimate

[单选题]Here some oil in the oily water separator, as a result of its lower （）, will separate and rise into the oil collection space.A . temperatureB . viscosityC . densityD . velocity

[主观题]them alone for some time before reading again, will help a 84.

[试题]______(tell)you about it some time before，but I don't remember it now.