单项选择题
A.ignition quality of the fuel
B.calorific value of the fuel
C.flash point of the fuel
D.rate of fuel consumption
单项选择题 The cetane number of a diesel fuel oil indicates its（）
单项选择题 Which of the listed factors will indicate the most about the ability of a fuel to ignite in a diesel engine?（）
单项选择题 Why will a turbocharger diesel engine produce black smoke if excessive additional load is applied too quickly?（）