问题
问答题 简答题
低压三相异步电动机验收试验项目有哪些？其质量标准是什么？
答案
参考答案：
测量定子线圈的绝缘电阻，常温下绝缘电阻不小于0.5MΩ；
测量定子线圈的直流电阻，各相线圈直流电阻相互区别不应超过其最小值的2%，中性点未引出的可测量线间电阻，其相互差别不应超过其最小值的1%；
定子线圈的交流耐压试验，工频交流耐压1000V一分钟。
搜题请搜索小程序“爱下问搜题”
低压三相异步电动机验收试验项目有哪些？其质量标准是什么？
参考答案：
测量定子线圈的绝缘电阻，常温下绝缘电阻不小于0.5MΩ；
测量定子线圈的直流电阻，各相线圈直流电阻相互区别不应超过其最小值的2%，中性点未引出的可测量线间电阻，其相互差别不应超过其最小值的1%；
定子线圈的交流耐压试验，工频交流耐压1000V一分钟。
| 阅读理解。 |
Food, Drink & Refreshment |
| 1. The above reading is most probably ______. |
[ ] |
| A. an advertisement B. a food report C. a shopping list D. a menu |
| 2. It's clear that the Eatery ______. |
[ ] |
| A. can hold 150 people at most B. only provides Chinese food C. was set up in the year of 1980 D. doesn't offer many choices |
| 3. At the loch Ness Eatery, visitors can ______. |
[ ] |
| A. book comfortable room B. have a picnic C. cook for themselves D. get a good relaxation |
| 4. The reading also tells us ______. |
[ ] |
| A. the prices of food and drinks B. the address of the Eatery C. the name of the manager D. the way of getting in touch with the Eatery |
| 5. The Eatery provides almost everything to ______. |
[ ] |
| A. to serve people for a long time B. meet the needs of different visitors C. let people take away D. help people learn about people |