问题描述：
[单选]
High firing pressures and a low exhaust temperature in a diesel engine may result from（）．
A．decreased piston to cylinder head clearance
B．increased exhaust system back pressure
C．early fuel injection timing
D．low scavenge air temperature
参考答案：查看无
答案解析：无
☆收藏
答案解析：无
☆收藏
上一篇：Poor combustion in a diesel engine can be caused by（）．
下一篇：Exhaust valve grooving and corrosion is caused by certain components of residual fuel oilThese components are sodium， sulfur， and（）．
- 我要回答: 网友(216.73.216.223)
- 热门题目: 1.常见气阀的损伤有（）等。Ⅰ. 2.四冲程柴油机的进、排气阀和二 3.在高增压柴油机上，排气阀阀盘