单项选择题 Which of the following problems can occur if you continually fail to drain off condensate from a starting air receiver?（）

单项选择题 During the valve overlap period, the exhaust pressure of a turbochargers, four-stroke/cycle diesel engine must be less than the intake manifold pressure to ensure （）

单项选择题 Which of the listed diesel engine systems is likely to create the problem of a cylinder regularly misfiring?（）