<img src=https://huaweicloudobs.ahjxjy.cn/FA1CF1667104B087FBDF9230F79CCBB4.png title=Unnamed QQ Screenshot20170106221430.png alt=Unnamed QQ Screenshot20170106221430.png/>

【单选题】【消耗次数：1】

① <img src=https://huaweicloudobs.ahjxjy.cn/0DAFD377749891DF1775713DC25C520E.png title=Unnamed QQ Screenshot20170106221442.png alt=Unnamed QQ Screenshot20170106221442.png/>

② <img src=https://huaweicloudobs.ahjxjy.cn/BBE7B8CB85A645EA04108FA7568B046A.png title=Unnamed QQ Screenshot20170106221451.png alt=Unnamed QQ Screenshot20170106221451.png/>

③ <img src=https://huaweicloudobs.ahjxjy.cn/55D9534D5B228F800BECCD93F5F2FC0F.png title=Unnamed QQ Screenshot20170106221500.png alt=Unnamed QQ Screenshot20170106221500.png/>

④ <img src=https://huaweicloudobs.ahjxjy.cn/03851A84566B815F77F99C094564CFB2.png title=Unnamed QQ Screenshot20170106221513.png alt=Unnamed QQ Screenshot20170106221513.png/>

参考答案：

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① <img src=https://huaweicloudobs.ahjxjy.cn/0DAFD377749891DF1775713DC25C520E.png title=Unnamed QQ Screenshot20170106221442.png alt=Unnamed QQ Screenshot20170106221442.png style=white-space: normal;/>

② <img src=https://huaweicloudobs.ahjxjy.cn/BBE7B8CB85A645EA04108FA7568B046A.png title=Unnamed QQ Screenshot20170106221451.png alt=Unnamed QQ Screenshot20170106221451.png style=white-space: normal;/>

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① <img src=https://huaweicloudobs.ahjxjy.cn/720B18640E698A9D028DBEF7491379A1.png title=Unnamed QQ Screenshot20170106131608.png alt=Unnamed QQ Screenshot20170106131608.png style=white-space: normal;/>

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① 正确

② 错误

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【单选题】 <img src=https://huaweicloudobs.ahjxjy.cn/92A72A75490A6E38933B9D45E392DA7C.png title=Unnamed QQ Screenshot20170106131017.png alt=Unnamed QQ Screenshot20170106131017.png style=white-space: normal;/>

① <img src=https://huaweicloudobs.ahjxjy.cn/8A0C63E83310CCB6E2F311C257772D41.png title=Unnamed QQ Screenshot20170106131035.png alt=Unnamed QQ Screenshot20170106131035.png style=white-space: normal;/>

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③ <img src=https://huaweicloudobs.ahjxjy.cn/CE316122085BD9301290A1EB01316053.png title=Unnamed QQ Screenshot20170106131053.png alt=Unnamed QQ Screenshot20170106131053.png style=white-space: normal;/>

④ <img src=https://huaweicloudobs.ahjxjy.cn/435E476303B16CDB86A3DB639DD22865.png title=Unnamed QQ Screenshot20170106131100.png alt=Unnamed QQ Screenshot20170106131100.png style=white-space: normal;/>

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① 2

② -2

③ 3

④ -3

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【判断题】 <img src=https://huaweicloudobs.ahjxjy.cn/2A77F3E2405B99C73E2D659E9FFDB823.png title=Unnamed QQ Screenshot20170107230008.png alt=Unnamed QQ Screenshot20170107230008.png/>

① 正确

② 错误

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随机题目

【单选题】下图所示网络中，f点发生三相短路时，关于短路点右侧网络中的电流正确的说法是（）。<imgsrc="http://wljy.whut.edu.cn:80/uploadfiles/kindeditorAttached/image/20191205/20191205075635_277.png"alt=""/>

① 不存在电流

② 过渡过程中存在电流

③ 电流始终存在

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【单选题】沸腾钢含氧量较高，冲击韧性较

① 好

② 差

③ 一般

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【单选题】工程上使用的金属绝大部分是。

① 单晶体

② 多晶体

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【多选题】按模样特征分类（）

① 整模造型

② 分模造型

③ 挖砂造型

④ 假箱造型

⑤ 活块造型和刮板造型

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【单选题】单相变压器磁路饱和时，主磁通<imgwidth="35"height="54"src="http://wljy.whut.edu.cn:80/uploadfiles/word/DJYTD.files/DJYTD28530.png">和励磁电流<imgwidth="38"height="60"src="http://wljy.whut.edu.cn:80/uploadfiles/word/DJYTD.files/DJYTD28643.png">的波形（）

① 同时为正弦波

② 同为尖顶波

③ 不会同时为正弦波

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【单选题】变压器主磁通<imgwidth="50"height="60"src="http://wljy.whut.edu.cn:80/uploadfiles/word/DJYTD.files/DJYTD18138.png">的主要特征是：

① 一个幅值恒定的旋转磁场

② 一个幅值变化的旋转磁场

③ 一个幅值变化，位置不变的脉动磁场

④ 必须在自定义函数后面

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① 正确

② 错误

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【判断题】额定电压为<imgwidth="72"height="18"v:shapes="对象_x0020_5"src="http://wljy.whut.edu.cn:80/uploadfiles/word/djytdpdt.files/image002.png">的单相变压器，短路阻抗<imgwidth="130"height="24"v:shapes="对象_x0020_6"src="http://wljy.whut.edu.cn:80/uploadfiles/word/djytdpdt.files/image004.png">，负载阻抗为<imgwidth="124"height="22"v:shapes="对象_x0020_7"src="http://wljy.whut.edu.cn:80/uploadfiles/word/djytdpdt.files/image006.png">,从一次侧看进去总阻抗大小为<imgwidth="94"height="22"v:shapes="对象_x0020_8"src="http://wljy.whut.edu.cn:80/uploadfiles/word/djytdpdt.files/image008.png">。

① 正确

② 错误

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【判断题】采用电动机惯例的一台他励直流电动机<imgwidth="134"height="24"v:shapes="对象_x0020_20"src="http://wljy.whut.edu.cn:80/uploadfiles/word/djytdpdt.files/image018.png">则电动机运行于倒拉反转状态。

① 正确

② 错误

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【判断题】单相变压器原/副绕组的标志方式不仅与绕组的绕制方式有关，还与绕组的首端A（a）和尾端X(<imgwidth="14"height="14"v:shapes="对象_x0020_48"src="http://wljy.whut.edu.cn:80/uploadfiles/word/djytdpdt.files/image046.png">)有关。

① 正确

② 错误

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