单项选择题
A.reduce lube oil temperature B.raise exhaust temperature reduce C.excessive heating of engine room D.reduce load on cooling water pump
A condition contributing to diesel engine piston rings ...
单项选择题A condition contributing to diesel engine piston rings sticking in the ring grooves, is insufficient ring clearance at the ring（）
A.gap B.side C.back D.radial
An auxiliary diesel engine may fail to start due to（）A....
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
Diesel engine exhaust noise can be reduced in an exhaus...
单项选择题Diesel engine exhaust noise can be reduced in an exhaust muffler by （）
A.changing the direction of exhaust gas flow B.increasing the exhaust gas velocity C.changing the exhaust gas weight D.increasing the exhaust gas static pressure
