資訊推薦

• 2. 有一部 1.5 kW、100 V之直流電動機，滿載效率 75 %，求其滿載電流為何？(A) 10 A (B) 20 A (C) 25 A (D) 40 A
• 3. 有一台水力發電機使用的絕緣材料為 F 絕緣等級，求其可容許最高溫度為何？(A) 90 ℃ (B) 130 ℃ (C) 155 ℃ (D) 180 ℃
• 4. 有一磁路已知磁阻為 4000 AT / Wb，鐵心上繞有 2000 匝的線圈，外加電流 5 A，則產生之磁通量為何？(A) 1 Wb (B) 2 Wb (C) 2.5 Wb (D) 4 Wb
• 5. 變壓器鐵心如採用內鐵式，與外鐵式相比較，下列何者有誤？(A)絕緣散熱好 (B)適於高電壓、低電流(C)抑制機械應力好 (D)用鐵量少
• 6. 有關理想變壓器，下列何者有誤？(A)銅損 = 0、鐵損 = 0 (B)效率 η = 1(C)導磁係數 μ = ∞ (D)電壓調整率 ε = 1
• 7. 有一部配電用變壓器容量 15 kVA，鐵損為 150 W，滿載銅損為 400 W，負載功率因數為 0.8，求其在半載之效率為何？(A) 95 % (B) 96 % (C) 97 % (D) 98
• 8. 有一部 20 kVA、2000 V / 200 V之變壓器，求高壓側與低壓側額定電流各為何？(A) 1 A、10 A (B) 10 A、10 A(C) 10 A、100 A (D) 100 A、
• 9. 有一部單相 3300 V / 220 V變壓器，若高壓側電阻為 90 Ω，則等效至低壓側的電阻值為何？(A) 0.4 Ω (B) 4 Ω (C) 40 Ω (D) 400 Ω
• 10. 有一部單相變壓器匝數比為 20：1，滿載時二次側端電壓為 100 V，一次側端電壓為 2080 V，則其電壓調整率為何？(A) 2 % (B) 3 % (C) 4 % (D) 5 %
• 11. 有關變壓器之三相△連接，下列何者正確？(A)線電壓= 相電壓 (B)線電壓=相電壓(C)線電流=相電流 (D) 線電流=相電流
• 68. Among 9 different molecules below, X of them can cleave disulfide bond, and Y of them canreact w
• 69. How many of the followings are ketogenic amino acid in human?Asp； Phe； Arg； Val； His； Thr； Lys.(
• 70. How many items of the followings have the activity of proof-reading to reduce the error rate inb
• 71. Which one of followings is NOT used for thymine dimer repair?(A) Daughter strand gap repair (B)
• 72. The pentose phosphate pathway of glucose oxidation produces ______.(A) coenzyme Q10 (B) FADH2 (C
• 73. The thickness of endoplasmic reticulum membrane is about 37.5 Å. Which one of the followingsis c
• 74. There are cholesterols and cholesterol esters in LDL. How and where are cholesterol estersgenera
• 75. Okazaki fragments are ______.(A) short DNA pieces that explain how DNA is synthesized on the lag
• 76. Which of the followings describes the initial bond formation in the covalent intermediate in the
• 77. Which of the following statements about farnesyl-linked proteins and glycosylphosphatidylinosito
• 78. What is an important component(s) to transport ammonia from skeletal muscles and the othertissue
• 79. Which statement about energy metabolism in patients with type I diabetes mellitus and poor blood
• 80. A young boy is unusually tall and presents with joint laxity and retinal detachment. Examination
• 81. How is DNA recombination achieved during meiosis?(A) Double-strand break recombination (B) Singl
• 82. What is the main pharmacological action of benzoate and phenylbutyrate, which are used to treatu