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.

[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]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]（） is sometimes used for piston cooling since leaks into the crankcase would not cause problems.A . Diesel oilB . Hydraulic oilC . Lube oilD . Mineral oil

[单选题]In the closed cooling system, the water （）.A . is made to circulate out of the systemB . is made to circulate within the systemC . is made circulate within the systemD . is made circulate out of the system

[单选题]There is （） in any water cooling system for a diesel engine allowing for expansion and water make-up in the system as well as air vent and chemicals addition.A . a setting tankB . a service tankC . a head tankD . an expansion joint

[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 diesel engine cooling water system, a pH of 60 indicates a/an （）.A . slightly acidic conditionB . slightly alkaline conditionC . overtreatment of waterD . neutral condition of water

[单选题]A diesel engine cooling water system with a pH factor of 30 indicates a condition of （）.A . slight acidityB . slight alkalinityC . excessive alkalinityD . excessive acidity

[名词解释] 停堆冷却系统 shutdown cooling system