单项选择题
A.incorrect replacement of barrels and plungers of jerk pumps
B.overheating of the nozzle orifices
C.cracked pump housings
D.dirt in the fuel
单项选择题 By comparing the exhaust gas temperature of each cylinder, the operator can determine if the load is balanced throughout the engineThe device most commonly used is a（）.
单项选择题 Heat damage to fuel injection nozzles on small high-speed diesel engines, can be prevented by（）
单项选择题 One of the advantages in the use of a dry liner over a wet liner is（）