单项选择题
A.Improper fuel rack positioning B.Lengthy opening of the exhaust valve C.Excessively early injection timing D.Extended light load operation
After-cooling of a turbocharged diesel engine will resu...
单项选择题After-cooling of a turbocharged diesel engine will result in （）
A.higher torque but lower brake horsepower B.lower torque but higher brake horsepower C.higher torque and lower brake horsepower D.lower torque and higher brake horsepower
Lubricating oil used in a diesel engine serves to（）A.re...
单项选择题Lubricating oil used in a diesel engine serves to（）
A.reduce the wear of bearing surfaces B.cool the bearing surfaces C.assist in sealing bearing surfaces D.all of the above
Which of the terms listed below represents the operatio...
单项选择题Which of the terms listed below represents the operational speed at which excessive engine vibration is created?（）
A.Non-harmonic speed B.Critical speed C.Maximum speed D.Design maximum speed
