单项选择题
Early injection timing is indicated by （）.
A.high exhaust temperature and low firing pressure B.high exhaust temperature and high firing pressure C.low exhaust temperature and low firing pressure D.low exhaust temperature and high firing pressure
单项选择题 A faulty injection in one cylinder of an operating diesel engine can be located by （）
单项选择题 What harmful condition can result if a diesel engine is operated at very light loads for long periods of time?（）
单项选择题 Turbocharged four-stroke/cycle diesel engines utilize valve overlap for（）.
