单项选择题
A.change from heavy fuel oil to diesel oil for mail engine B.pumping oil bilge water C.change sea chest form high level one to lower one D.test emergency generator
Which of the following represents the significance the ...
单项选择题Which of the following represents the significance the fuel oil cetane number?（）
A.The cetane number has no affect on injection lag B.The cetane number is an indication of the fuel’s viscosity C.Ignition lag is reduced with fuels having a high cetane number D.The cetane number is of little significance in the combustion
Which of the following conditions is realized by the tu...
单项选择题Which of the following conditions is realized by the turbo-charging of a previously naturally aspirated diesel engine?（）
A.Ignition lag increases B.Lube oil system pressure increases C.Brake specific fuel consumption increased D.Mechanical efficiency increaded
Piston cooling fins are located（）A.atop the piston crow...
单项选择题Piston cooling fins are located（）
A.atop the piston crown B.beneath the piston crown C.at the base of the piston skirt D.inside the cylinder liner cooling water jacket
