43. 一10 Hp、60 Hz、220 V的三相感應馬達，若滿載時之功率因數為0.875、效率為0.9，試求 滿載時之電流約為多少？
(A) 35A
(B) 30A
(C) 25A
(D) 20A

44. 一般交流馬達的定子，理想上要提供： (A) 大小且方向皆穩定的磁場 (B) 大小穩定但方向一直旋轉的磁場 (C) 大小一直改變但方向穩定的磁場 (D) 大小一直改變且方向一直旋轉的磁場

45. 單相感應馬達的定子，經常設有兩繞組，故需有相差約90度的兩電流(兩相電流)，試問 下列何者為一般此類馬達所採用，以造成兩相電流的方法？ (A) 其中一繞組並聯電感 (B) 其中一繞組串聯電感 (C) 其中一繞組並聯電容 (D) 其中一繞組串聯電容

46. 馬達的功率損失，主要可分哪兩類？ (A) 銅損及鐵損 (B) 電氣損失及發熱損失 (C) 摩擦損失及電壓損失 (D) 磁滯損失及渦流損失

47. 液壓增壓器之低壓側的活塞直徑，若為高壓側的兩倍，試問正常工作時，高壓側之壓力 應為低壓側幾倍？ (A) 1倍 (B) 2倍 (C) 3倍 (D) 4倍

48. φ20× L100的油壓缸，不計摩擦下，若欲使其出力達700N，試問油壓系統之放洩閥壓力， 至少要選下列哪一壓力值？ (A) 20 kgf/ cm2 (B) 25 kgf/ cm2 (C) 30 kgf/ cm2 (D) 35 kgf/ cm2

49. 下列有關氣壓之敘述，何者為錯誤？ (A) 空氣為可壓縮流體 (B) 空氣壓縮後水分可能會凝結 (C) 空氣冷卻後水分可能會凝結 (D) 空壓系統適合做伺服控制 公告試題僅供參考 飛機工程、輪機工程、車輛工程、農業機械工程 專業科目(一) 第 9 頁 共 9 頁

50. 如圖(十九)所示之氣壓及電氣控制迴路，若計時器在計時中系統突然斷電，試問氣壓系統 會有何反應？ (A) 活塞桿及閥保持於原位置，不會動 (B) 活塞桿繼續往前進，直到最伸出位置後停止 (C) 活塞桿立刻後退，直到最縮回位置後停止 (D) 要看斷電瞬間方向控制閥所在的位置，才能判定 

複選題2(AB) Packaging has, therefore, attained an important place in Japan’s economy. (AC) The product has to speak to the consumer’s needs with both personality and practical value. (AD) The Japanese tend to use more packaging because of a cultural emphasis on freshness and a lack of storage space at home. (AE) New packaging is introduced to Japanese store shelves at a rate of 20 percent per year, the highest rate in the world. (BC) Japanese companies have been accused of over-packaging; but within the Japanese cultural context, that’s not really true. (BD) The packaging market is worth over ￥7.4 trillion. (BE) In such an environment, a product has to have more than just a nice graphic design to differentiate it from its shelf-mates. (CD) Moreover, they believe nice packaging adds value because it’s a strong signal of quality.

複選題3(AB) Packaging has, therefore, attained an important place in Japan’s economy. (AC) The product has to speak to the consumer’s needs with both personality and practical value. (AD) The Japanese tend to use more packaging because of a cultural emphasis on freshness and a lack of storage space at home. (AE) New packaging is introduced to Japanese store shelves at a rate of 20 percent per year, the highest rate in the world. (BC) Japanese companies have been accused of over-packaging; but within the Japanese cultural context, that’s not really true. (BD) The packaging market is worth over ￥7.4 trillion. (BE) In such an environment, a product has to have more than just a nice graphic design to differentiate it from its shelf-mates. (CD) Moreover, they believe nice packaging adds value because it’s a strong signal of quality.

複選題4(AB) Packaging has, therefore, attained an important place in Japan’s economy. (AC) The product has to speak to the consumer’s needs with both personality and practical value. (AD) The Japanese tend to use more packaging because of a cultural emphasis on freshness and a lack of storage space at home. (AE) New packaging is introduced to Japanese store shelves at a rate of 20 percent per year, the highest rate in the world. (BC) Japanese companies have been accused of over-packaging; but within the Japanese cultural context, that’s not really true. (BD) The packaging market is worth over ￥7.4 trillion. (BE) In such an environment, a product has to have more than just a nice graphic design to differentiate it from its shelf-mates. (CD) Moreover, they believe nice packaging adds value because it’s a strong signal of quality.

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