（） is sometimes used for piston cooling since leaks into the crankcase would not cause problems.

[单选题]A separate piston cooling system is used to limit any contamination （） piston cooling glands（） the piston cooling system only.A . between；toB . either；orC . from；toD . neither；nor

[单选题]As to the piston cooling, of the following, which statement is not true?（）A . Because the piston is exposed to very high temperature, it must be cooledB . The lower the piston cooling temperature is, the better it isC . Both water and lube oil can be

[单选题]Piston cooling fins are locatedA．atop the piston crownB．beneath the piston crownC．at the base of the piston skirtD．inside the cylinder liner cooling water jacket

[单选题]The cooling of the piston is carried out by circulating （） across the underside of the crown and inside the ring belt or through specially shaped passages.A . sea waterB . scavenging airC . lubricating oilD . fuel oil

[单选题]For diesel engine piston cooling, lubricating oil can be supplied to the pistons by a/an （）.A . oil sprayB . oil bathC . oil control ringsD . drilled passage through the camshaft

[单选题]The cooling liquid used for the cylinder may be referred to as _____.A．jacket waterB．make-up waterC．boiler waterD．flushing water

[单选题]The cooling liquid used for the cylinder may be referred to as （）.A . jacket waterB . make-up waterC . boiler waterD . flushing water

[单选题]Fresh water is used for the cooling of cylinder jackets and （） of the marine diesel engine.A . cylinder coversB . lubricating spaceC . crossheadD . exhaust manifold

[单选题]In a central cooling system, used in some modem ships, sea water is supplied to cool （）which will circulate to other individual cooler, greatly reducing the corrosion problems.A . main bearingsB . sea waterC . cooling oilD . lower temperature fresh w

[单选题]This used piston had been tested and approved as a spare part by the （） during last annual repair.A . agentB . shipchandlerC . surveyorD . engineer