正确答案: B
35
题目:在约定MCR工况下,建议废气管内流速不超过50m/s,实际上为避免压力损失太大,废气流速约为()m/s
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学习资料的答案和解析:
[单选题]吊缸发现燃烧室零件表面有水锈时,表明()产生穿透性裂纹。
气缸或活塞
[单选题]位于喷油泵和高压油管之间的出油阀,其作用有()。Ⅰ.止回;Ⅱ.便于排除空气;Ⅲ.缩短喷油迟后阶段;Ⅳ.控制高压油管中的剩余压力。
Ⅰ+Ⅱ+Ⅲ+Ⅳ
[单选题]增压器自带油泵工作的可靠性与其安装质量有关,安装时应保证()。
D.油泵轴线与转子轴线同轴
[单选题]由于轴系的实际变形难以检测,通过测量轴系的相邻轴两法兰的()来了解轴系轴心线的实际状态。
偏中值
[单选题]Fuel is not supplied to the corresponding cylinders due to ().
a failure of fuel pum
[单选题]In the event of the cylinder starting valve leakage () would pass into the air pipes and ignite the oil deposited.
hot gase
[单选题]If a diesel engine is difficult to start and operates with the engine temperatures lower than normal, you should suspect that the ().
compression pressures are below normal