单项选择题
An auxiliary diesel engine may fail to start due to（）
A.low exhaust back pressure B.high lube oil temperature C.insufficient cranking speed D.excessive fuel atomization
单项选择题 Diesel engine exhaust noise can be reduced in an exhaust muffler by （）
单项选择题 Misfiring in a diesel engine at light loads can be caused by（）
单项选择题 In a diesel engine exhaust system, the cooling of the exhaust gases below their dew point, will result in （）
