单项选择题
A.ignition quality of the fuel B.high heating value of the fuel C.amount of carbon residue after combustion D.internal flow resistance in the injectors
A two-stroke/cycle diesel engine requires less starting...
单项选择题A two-stroke/cycle diesel engine requires less starting air than a four-stroke/cycle diesel engine, of equal displacement, because the two-stroke/cycle diesel engine（）
A.has little or no internal friction B.has a lower effective compression ratio C.operates with scavenge air under a positive pressure D.operates without energy absorbing intake and exhaust strokes
Which of the following operating conditions can occur w...
单项选择题Which of the following operating conditions can occur when shims are removed from the joint between the foot of a marine type diesel engine connecting rod and the bearing box?（）
A.Decreased connecting rod bearing clearance B.Increased connecting rod bearing clearance C.Decreased compression ratio D.Increased compression ratio
The longer the ignition delay period resulting from imp...
单项选择题The longer the ignition delay period resulting from improper use of low cetane fuel, the （）
A.less fuel will enter the cylinder B.higher the cylinder combustion temperature C.more complete the fuel combustion D.more rapid the rise in combustion pressure
