气缸盖冷却侧裂纹一般多产生在（）。Ⅰ.钻孔处；Ⅱ.钻孔之间；Ⅲ.冷

【名词&注释】

利用率(utilization ratio)

[单选题]气缸盖冷却侧裂纹一般多产生在（）。Ⅰ.钻孔处；Ⅱ.钻孔之间；Ⅲ.冷却水道筋的根部；Ⅳ.冷却水道底部；Ⅴ.有应力集中处。

A. A．Ⅰ＋Ⅲ＋Ⅳ
B. B．Ⅰ＋Ⅲ＋Ⅴ
C. C．Ⅱ＋Ⅲ＋Ⅳ
D. D．Ⅰ＋Ⅲ

查看答案&解析 查看所有试题

学习资料：

[单选题]废气锅炉窄点较低（）。Ⅰ.可提高废气锅炉的利用率；Ⅱ.废气锅炉应有较大受热面；Ⅲ.废气锅炉废气压力损失较小

A. Ⅰ+Ⅱ
B. Ⅰ+Ⅲ
C. Ⅱ+Ⅲ
D. Ⅰ+Ⅱ+Ⅲ

[单选题]The fourth engineer accompanied by the workers on oil barge measures the oil levels, temperature and （） in the tanks.

A. tank table
B. trim
C. water contents
D. oil pressure

[单选题]The high pressure in fuel injection system of the diesel engine is produced by the （）.

A. injector pump
B. fuel injector
C. governor
D. turbocharger

[单选题]Vee-type engines have the connecting rods from two cylinders connected to each （） of the crankshaft.

A. throw
B. web
C. main bearing
D. deflectio

[单选题]Indirect cooling of fuel injector nozzle holders for diesel engines is accomplished primarily by （）.

A. heat conduction into the injected fuel oil
B. heat conduction into the water jacket wall
C. water circulation through passages in the holder
D. fuel oil circulation through passages in the holder

本文链接：https://www.51bdks.net/show/g8gdow.html