The selection of an oil from the （） depends to a great extent on the operating conditions, the design of the engine and the type of fuel to be burned.

[单选题]The selection of an oil depends （） on the operating conditions, the design of the engine and the type of fuel to be burned.A . to a great extentB . on a great extentC . on mainlyD . on only

[单选题]The selection of a lubricating oil depends to a great extent on the operating conditions,（）.A . the type of coolantB . the design of the engineC . the type of fuel to be burnedD . B and C

[单选题]F．rom this selection we may conclude that the king's crown______.A． moved less water than pure gold of the same sizeB． moved more water than pure gold of the same weightC． moved more water than pure gold of the same sizeD． moved less water than pure

[单选题]Itseemsoil________fromthispipeforsometime.We’llhavetotakethemachineaparttoputitright.A．)hadleakedB)isleakingC)leakedD)hasbeenleaking

[单选题]The removal of （） from lubricating oil will reduce engine wear and possible breakdowns.A . contaminating waterB . contaminated additivesC . contaminated fuelD . contaminating impuritie

[单选题]The lubricating oil is pumped from the drain tank, very often with （） in the suction line.A . a filterB . a strainerC . a magnetic filterD . a fine strainer

[单选题]The oil is drawn from a drain tank through （）, one of a pair of pumps, into one of fine filters.A . a strain tankB . a head tankC . a service tankD . a strainer

[单选题]Fuel oil is pumped by means of （） from the bunker tanks.A . a transfer pumpB . a bilge pumpC . a service pumpD . a vacuum pum

[单选题]_______can cause oil flow from water outlet of the oil purifier.A．Oil inlet valve opening too quicklyB．Oil temperature little higher than normalC．Diameter of gravity disc too smallD．Viscosity of oil little lower than normal

[单选题]Lube oil pumps taking suction from the sump of most small marine engines are usually （）.A . of the diaphragm typeB . of the centrifugal typeC . of the positive displacement typeD . independently driven by electric motor