The major cause of problems occurring with fuel injection equipment is（）
- Aincorrect replacement of barrels and plungers of jerk pumps
- Boverheating of the nozzle orifices
- Ccracked pump housings
- Ddirt in the fuel
问题
The major cause of problems occurring
参考解析：
分类：船舶电气与船舶安全题库
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