正确答案: A
half the engine rotational speed
题目:In a four-stroke engines the camshaft rotates at ().
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学习资料的答案和解析:
[单选题]可靠性在船舶动力装置质量指标中占有特殊的地位,因为它是()。Ⅰ.落实其他质量指标的前提;Ⅱ.直接影响其他指标的优劣
Ⅰ,Ⅱ都对
[单选题]柴油机运转中,轮机员可根据气缸或活塞冷却水的()直接迅速判断零件上有无穿透性裂纹。Ⅰ.压力变化;Ⅱ.压力表指针波动;Ⅲ.水温变化;Ⅳ.流量变化;Ⅴ.膨胀水柜水位波动。
Ⅰ+Ⅱ+Ⅴ
[单选题]曲轴臂距差的符号表明曲轴()。
受力方向
[单选题]() is usually driven by the engine camshaft and supplies pilot air to the cylinder air start valve.
An air distributor
[单选题]For Vee-form engines, () is shaped to given two slopping surface on which () are placed at the correct relative angle to each other.
the top of the column;the cylinder blocks
[单选题]Overspeed of the diesel engine driving an electric generator could cause().
damage to windings