【名词&注释】
柴油机排气(diesel exhaust)
[单选题]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.
A. specific volume
B. density
C. viscosity
D. calorific value
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学习资料:
[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
A. Ⅰ+Ⅱ
B. Ⅰ+Ⅲ
C. Ⅱ+Ⅲ
D. 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
A. 仅Ⅰ对
B. 仅Ⅱ对
C. Ⅰ,Ⅱ都对
D. Ⅰ,Ⅱ都不对
[单选题]Marine four-stroke diesel engines are mainly ().
A. of crosshead type
B. of trunk piston type
C. of low speed type
D. all the above
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