【名词&注释】
柴油机排气(diesel exhaust)、不允许(not allow)、柴油机负荷(diesel load)
[单选题]Among the rings of a piston the () one is subjected to the greatest load and temperature.
A. bottom
B. middle
C. top
D. none of the above
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学习资料:
[单选题]不允许柴油机排气恶化,防止锅炉烟垢沉积,其措施是()。
A. 保持柴油机良好的燃烧和排气,减少排气颗粒排放率
B. 在柴油机负荷低时,旁通全部废气,防止锅炉烟垢沉积
C. A十B
D. 在柴油机负荷高时,废气部分旁通,减少锅炉烟垢沉积
[单选题]当气缸内径增量超标时,应选用()进行修理。Ⅰ.镀铬;Ⅱ.镀铁;Ⅲ.镗缸;Ⅳ.修理尺寸法;Ⅴ.恢复尺寸法。
A. Ⅰ+Ⅲ+Ⅳ+Ⅴ
B. Ⅰ+Ⅱ+Ⅴ
C. Ⅳ+Ⅴ
D. Ⅰ+Ⅱ+Ⅲ
[单选题]Low compression of diesel engine may result from ()
A. a worn cylinder
B. broken piston rings
C. any of A and B
D. none of the above
[单选题]The most important factor in engine performance is the actual power output at the end of the crankshaft available for doing workThis is known as ().
A. indicated horsepower
B. brake horsepower
C. net horsepower
D. friction horsepower
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