管道防腐（corrosion preventive of pipes）

[单选题]With （）, the corrosion problems are much reduced in a central cooling system.A . no equipment in contact with sea waterB . less equipment in contact with fresh waterC . more equipment in contact with sea waterD . less equipment in contact with sea wa

[名词解释] 管道防腐

[单选题]Exhaust valve grooving and corrosion is caused by certain components of residual fuel oilThese components are sodium, sulfur, and （）.A . vanadiumB . carbonC . copperD . ash

[单选题]Telescopic pipes to the piston of a large slow-speed main propulsion diesel engine are designed to prevent （）.A . excessive crankcase pressureB . excessive lube oil temperatureC . contamination of the lube oil by waterD . contamination of the cooling

[单选题]To minimize corrosion, fuel oil strainer disks, spacers and scraper blades are made of （）.A . brassB . copperC . ironD . monel metal or stainless steel

[单选题]F．or what purpose are the diving pipes used?A． To absorb heat from the sun.B． To store heat for future use.C． To turn solar energy into heat energy.D． To carry heat down below the surface.

[单选题]The lubricating pipes and dusts should be blown out with （）.A . atmosphereB . the fresh waterC . compressed airD . chemical compound

[单选题]The fuel pipes and ducts should be blown with （）.A . atmosphereB . the fresh waterC . compressed airD . chemical compound

[单选题]埋地管道防腐加强级防腐结构是（）。A.底漆一面漆一面漆一面漆B.底漆一面漆一面漆、玻璃布、面漆一面漆C.底漆一面漆一面漆、玻璃布、面漆一面漆、玻璃布D

[单选题]埋地管道的防腐，主要是采用（）进行防腐。A .防锈漆B .沥青绝缘C .调和漆D .生漆