单项选择题
A.The lower；the worse B.The higher；the better C.The lower；the better D.The highest；the worst
Injectors on modern engines are cooled by a combination...
单项选择题Injectors on modern engines are cooled by a combination of the intensive bore cooling in the cylinder by a combination of the intensive bore pockets and by the fuel which is re-circulated through the injector when the follower is on the （）of the cam or when the engine is stopped.
Fuels of different qualities may require advancing or r...
单项选择题Fuels of different qualities may require advancing or retarding the injection timing, in addition to which if the injection timing is advanced when the engine is running at loads below the （）, then a saving in fuel can be achieved.
A.BHP B.MCR C.IHP D.MEP
The plunger is machined to very fine tolerances, as is ...
单项选择题The plunger is machined to very fine tolerances, as is the matched（）in which it reciprocates.
A.barrel B.ram C.piston D.rod
