单项选择题
A.The chromium will not wear out the piston rings
B.The chromium strengthens the liners in the way of the scavenging air ports
C.Chromium eliminates the need for oil scraper rings
D.Pores in the plating aid in maintaining the lube oil film
单项选择题 If the speed of a turbocharged diesel engine is maintained constant the turbocharger speed will （）
单项选择题 The International Code for the Construction and equipment of Ships Carrying Dangerous Chemicals in Bulk (IBC Code) is a part of （）
单项选择题 Which of the following conditions is most likely to occur when unburned fuel contaminates the crankcase of a diesel engine?（）