電大水利水電工程與管理（專科）《水輪機、水泵及輔助設備》復習試題及參考答案-文庫吧
2025-05-14 14:28 本頁面
【正文】 2021 年 7 月 題號 一 二 三 四 五 總 分 題分 注意：請考生正確填寫試卷右上角的座位號。 得分 評卷人 一、判斷題：（每小題 2 分，共 20 分。） 1.√ 2.√ 3.╳ 4.√ 5.╳ 6.╳ 7.√ 8.√ 9.╳ 10.√ 得分 評卷人 二、單項選擇題（ 每小題 2 分，共 20 分） 1 A 2 A 3 B 4 A 5 A 6 A 7 A 8 A 9 A 10 A 得分 評卷人 三、簡答題（每小題 10 分，共 30 分。） 1. 答 :小型反擊式水輪機除了用蝸殼引水外，還常用明槽引水，罐式引水，小型流式水輪機還用豎井式和軸伸式裝置型式。 2． 答 :定槳式水輪機的葉片不能改變角度，工況變化時效率變化大，高效率區(qū)窄，轉槳式水輪機葉片可以改變角度，工況變化時效率下降慢，高效率區(qū)寬廣。 《水輪機、水泵及輔助設備》答案 :高比轉速水輪機一般葉片數目少，過流量大，因此，轉輪強度低，空化系數大，用于高水頭時，轉輪強度不夠，容易發(fā)生空化。 得分 評卷人 四、計算題（每小題 15 分，共 30 分。） :水輪機的工作水頭為 : g 上 下H H h h 1 0 0 0 9 5 0 1 4 9 （ m ）? ? ? ? ? ? ? ? ? ? P QH 20 49 8652 （ kW ）?? ? ? ? ? ? ggP P 86 52 0. 96 83 06 （ kW ）?? ? ? ? 2. 解 :根據水輪機的相似率，在同樣水頭條件下，水輪機的出力與轉輪直徑的平方成正比，故大機組的出力為 : 2P 320 0 （ 280/140 ） 12800 （ kW ）? ? ? 《水輪機、水泵及輔助設備》答案 請您刪除一下內容， O(∩ _∩ )O 謝謝?。?！ 2021 年中央電大期末復習考試小抄大全，電大期末考試必備小抄，電大考試必過小抄 After earning his spurs in the kitchens of The Westin, The Sheraton, Sens on the Bund, and a sprinkling of other topnotch venues, Simpson Lu fi nally got the chance to bee his own boss in November 2021. Sort of. The Shanghaiborn chef might not actually own California Pizza Kitchen (CPK) but he is in sole charge of both kitchen and frontof house at this Sinan Mansions39。stalwart. It’s certainly a responsibility to be the head chef, and then to have to manage the rest of the restaurant as well, the 31yearold tells Enjoy Shanghai. In hotels, for example, these jobs are strictly demarcated, so it’s a great opportunity to learn how a business operates across the board. It was a task that management back in sunny California evidently felt he was ready for, and a vote of confi dence from a pany that, to date, has opened 250 outlets in 11 countries. And for added pressure, the Shanghai branch was also CPK’s China debut. For sure it was a big step, and unlike all their other Asia operations that are franchises, they decided to manage it directly to begin with, says Simpson. Two years ago a private franchisee took over the lease, but the links to CPK headquarters are still strong, with a mainlandbased 39。brand ambassador’ on hand to ensure the business adheres to its ethos of creating innovativ
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