問題詳情
37. 交流同步發電機的逆功率保護裝置需設延時的原因為何？
(A) 均壓線在均衡無效功率，機組間會出現短時的環流
(B) 在並聯時會出現允許範圍內的短時逆功
(C) 完成調頻操作所必須的功能
(D) 為完成兩並聯電機相序相同
(A) 均壓線在均衡無效功率，機組間會出現短時的環流
(B) 在並聯時會出現允許範圍內的短時逆功
(C) 完成調頻操作所必須的功能
(D) 為完成兩並聯電機相序相同
參考答案
答案：B
難度：適中0.54902
統計：A(14),B(28),C(1),D(6),E(0)
內容推薦
- 當發電機起動後，發現配電盤上電壓錶無電壓顯示，下列何者不是其原因？(A) 發電機轉速不夠(B) AVR自動電壓調整器故障(C) 激磁電路故障(D) 電壓錶故障
- 直流配電盤發電機並聯條件中，用來檢測其條件是否滿足的儀錶是那一個？(A) 頻率錶(B) 電流錶(C) 電壓錶(D) 功率錶
- Why are otters and mussel shells included in the discussion in paragraph 3?(A) To provide an
- Which of the following terms is defined in the passage?(A) canopy(line 1)(B) warm blooded(lin
- The word ‘supplement” in line 24 is closest inmeaning to(A) control(B) replace(C) look for(D)
- What point does the author make to illustrate that babies are born with the ability to acqui
- The word "emphasize" in line 19 is closest in meaning to(A) stress(B) repeat(C) ex
- Which of the following can be inferred about the findings described in paragraph 2 ?(A) Babi
- 傳說中住在芬蘭的聖誕老公公，每年聖誕夜會到各地分送禮物。請問：當他到達下列哪一個地方時，最可能會因為當地氣候炎熱而脫下厚重外套？(A)澳洲 (B)法國 (C)南韓 (D)南極
- According to the passage, fairs in Philadelphiawere held(A) on the same day as market says(B)
內容推薦
- The word "prolific" in line 16 is closest in meaning to(A) fruitful(B) distinct(C)
- In the first paragraph, Bradstreet, Warren, andAdams are mentioned to show that(A) a woman’s
- 在下列空氣斷路器（Air circuit breaker）開關中，過電流保護裝置額定電流最大的是那一個？(A) 日用海水泵控制箱內的開關(B) 供電盤上接通動力供電板的開關(C) 供電盤上接通
- All of the following statements about the tails of comets are true EXCEPT:(A) They can conta
- The passage would most probably continue with a discussion of(A) what bedpans, foot warmers,
- The word "it" in line 21 refers to(A) biological productivity(B) oil(C) organic ma
- Questions 40-50Of all modern instruments, the violin is apparently one of the simplest. It consists
- "The King’s 24 Violins" is mentioned in line 15 to illustrate(A) how the violin be
- 四、圖四電路內，Rsig=100 kΩ，gm= 4 mA/V，RL=5 kΩ，Rs=100 Ω，Cgs=Cgd=1 pF。求中頻電壓增益（mid-band voltage gain）Vo /Vsig，
- What does the author mention as evidence of the characteristics of ancient sheep?(A) Represe
- The word "distinct" in line 17 is closest in meaning to(A) visible(B) gaseous(C) s
- Compared to the tail of electrically charged atoms, the tail of neutral dust particles isrel
- Questions 20-29Many prehistoric people subsisted as hunters and gatherers. Undoubtedly, gameanimals,
- The word "undergoing" in line 22 is closest in meaning to(A) requesting(B) experie
- What does the author mean by stating in line 17 that "economic development was on themer
- The word “celebratory” in line 12 means thatthe writings referred to were(A) related to part
- The word "They" in line 2 refers to(A) aviculturists(B)birds(C)eggs(D) rates
- In using the phrase “the heart of Los Angeles”in line 2, the author is talking about the city
- Question 22-31Archaeological discoveries have led some scholars to believe that the first Mesopotami
- According to the author, why do babies listen to songs and stories, even though they cannotu
- Questions 11-22Avicolturists, people who raise birds for commercial sale, have not yet learnedhow to
- The phrase "synonymous with" in line 5 is closest in meaning to(A) equivalent to(B
- According to paragraph 2, when thetemperature of the sides and bottom of the eggare cooler t
- The word “clues” in line 14 is closest in meaning to(A) proofs(B) indications(C) colors(D) v
- Question 10-19During the seventeenth and eighteenth centuries, almost nothing was written about thec