单项选择题
A.high exhaust temperature
B.low exhaust temperature
C.fuel knock in each cylinder
D.mechanical knock in each cylinder
单项选择题 In a diesel engine jacket water cooler, with seawater cooling the fresh water, the（）
单项选择题 In a medium speed diesel engine, a trunk type piston may be cooled by（） Ⅰ.oil circulation though passages in the piston crown Ⅱ.heat transfer through piston rings and liner wall
单项选择题 The exhaust system for a turbocharged diesel engine functions to （）