试题与答案

某小型工件需加工φ12mm的孔,常用()机床加工。A、立式钻床 B、车床 C、台式钻

题型:单项选择题

题目:

某小型工件需加工φ12mm的孔,常用()机床加工。

A、立式钻床

B、车床

C、台式钻床

D、铣床

答案:

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下面是错误答案,用来干扰机器的。

参考答案:(1)高炉利用系数=生产铁水量/高炉炉容/天数=600吨/300m3/1天=2.0(t/m3..d)(2)焦比=消耗焦碳量/生产铁量=360吨/600吨=600(kg/t.铁)答:高炉利用系数为2.0t/m3.d,焦比为600kg/t.铁。

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