试题与答案

计算题:某异步电动机采用三角形连接,双层绕组,绕组匝数为12匝,实测得槽形面积A=2

题型:问答题 简答题

题目:

计算题:某异步电动机采用三角形连接,双层绕组,绕组匝数为12匝,实测得槽形面积A=282mm²,若采用高强度聚脂漆包圆铜线,求导线的规格和电机的容量?漆包圆线k=0.42—0.45)

答案:

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题型:单项选择题

某建筑场地,受压土层为淤泥质黏土层,其厚度为10m,其底部为不透水层。场地采用排水固结法进行地基处理,竖井采用塑料排水带并打穿淤泥质黏土层,预压荷载总压力为70kPa,场地条件及地基处理示意如图(a)所示,加荷过程如图(b)所示。试问,加荷开始后100d时,淤泥质黏土层平均固结度与下列何项数值最为接近()

提示:不考虑竖井井阻和涂抹的影响;Fn=2.25;β=0.0244(1/d)。

A.0.85

B.0.87

C.0.89

D.0.92

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