【名词&注释】
柴油机(diesel engine)、松紧度
[单选题]在用液压拉伸器检查底脚螺栓的松紧度时,底脚螺栓外露的螺纹部分一定要清洁干净,否则可能导致()。
A. 底脚螺栓被拉断
B. 底脚螺栓被拉弯
C. 底脚螺栓与拉伸器咬住
D. 底脚螺栓被拉断或拉弯
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学习资料:
[单选题]柴油机气缸盖产生裂纹后,在分析产生裂纹原因时首先要检查的是()的问题。Ⅰ.制造质量;Ⅱ.设计;Ⅲ.材质;Ⅳ.管理;Ⅴ.保养。
A. Ⅰ+Ⅱ+Ⅲ+Ⅳ
B. Ⅰ+Ⅱ
C. Ⅰ+Ⅱ+Ⅲ
D. Ⅳ+Ⅴ
[单选题]In the closed cooling system, the water ().
A. is made to circulate out of the system
B. is made to circulate within the system
C. is made circulate within the system
D. is made circulate out of the system
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