正确答案: B
density
题目:Increased air () will raise scavenge efficiency and allow a greater mass of air to be compressed; more fuel may now be burned giving an increased power.
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学习资料的答案和解析:
[单选题]关于废气锅炉烟垢着火温度()。Ⅰ.烟垢潜在着火温度一般为300—400℃;Ⅱ.存在未燃烧的燃油时烟垢着火温度约为150℃;Ⅲ.极端情况下甚至低到120℃仍可发生烟垢着火
Ⅰ+Ⅱ+Ⅲ
[单选题]柴油机排气系统的背压与()。Ⅰ.废气流速的平方成正比;Ⅱ.与管径的4次方成反比
Ⅰ,Ⅱ都对
[单选题]Marine four-stroke diesel engines are mainly ().
of trunk piston type