問題詳情
五、一球形熱電偶(spherical thermocouple)直徑 0.75 mm,其熱輻射發射率(emissivity)為 0.41,被用來量測燃燒管內高溫燃氣的溫度。管壁被冷卻並維持在 52°C,熱電偶的溫度為 1162°C,忽略熱電偶導線的存在,求從熱電偶至管壁的輻射熱傳率。在定常狀態(steady state)下,熱電偶的輻射熱損失,由高溫燃氣熱對流來補充而達熱平衡,如果高溫燃氣之平均熱對流係數為 595 W/(m2 K),請估算高溫燃氣的溫度。(10 分) 

參考答案
答案:B
難度:簡單0.757812
統計:A(19),B(97),C(1),D(6),E(0)
內容推薦
- 43-45(5)(10)In public service lectures, fire fighters not only teach about fire prevention, escape p
- The studies on speaking-task difficulty have yielded some useful advice for the planning of speaking
- 41 Succeeding in securing energy for everyone does not have to come at the expense of anyone.(A) Sec
- 32 The doctor was pleased to tell the mother that her daughter’s arm was not broken. He said it was
- What does the advertisement writer suggest as a daytime activity?(A)Riding the ferry.(B)Swimm
- 蘇代為燕說齊,未見齊王,先說淳于髠曰:「人有賣駿馬者,比三旦立市,人莫之知。往見伯樂曰:『臣有駿馬,欲賣之,比三旦立於市,人莫與言,願子還而視之,去而顧之,臣請獻一朝之賈。』伯樂乃還而視之,去而顧之,
- 31 To understand the points of the author, you have to read _________.(A) between the lines (B) behi
- 六、比較蕃茄紅素(lycopene)與類黃酮(flavonoids)兩種天然色素之性質,並說明其在食品加工與貯藏時之變化。(20 分)
- 40 After he listened to Louis’s side of the story, Jackson understood the problem in a completely di
- 七、IPv6 的擴充性標頭(extension header)有那幾種? 怎麼辨識有那些擴充性標頭包含其中?(10 分)
內容推薦
- The word “chilly” in line 12 is most similar in meaning to(A)relaxing.(B)lonely.(C)quiet.(D)c
- 下列有關層析管柱效率之敘述,何者錯誤?(A).HETP是分析物在固定相與移動相間發生一次分配所需理論板數高度 (B).N = 54 (tr / W1/2)2 (C).HETP =
- 有關高壓液相層析法(HPLC)及毛細管電泳法(CE)之比較,下列何者正確?(A).HPLC之解析度較佳 (B).CE之理論板數較大 (C).HPLC之再現性較差 (D).CE分離僅用電
- In their talks, fire fighters teach the public(A)how to re-enter a burning building.(B)what v
- 43 According to the passage, what kind of stories are easier to understand?(A) Stories that pres
- 下列何種植物藥,非屬於傳統中藥?(A).Rheum palmatum (B).Panax quinquefolium (C).Prunus armeniaca (D).Rhamnus
- 下列有關西元28年著作之藥物學(De materia medica libri cinque),其作者及收載藥用植物大約數量之配對何者正確? (A).德國人希波克拉底斯(Hippocr
- 下列有關毛細管電泳法之敘述,何者錯誤?(A).毛細管內徑越大,散熱越佳 (B).毛細管區帶電泳法(capillary zone electrophoresis)使用勻相緩衝溶液及固定電
- 國民健康局以「臺灣101 躍動躍健康」為主軸,推動健康體重管理計畫,請問身體質量指數(Body Mass Index, BMI)多少是健康體位:(A)0<BMI<0 kg/m2 (B)
- 44 According to the passage, which of the following statements is true?(A) The more individuals
- 下列何者與wild cherry生藥材無關?(A).Rosaceae (B).Prunasin (C).Root bark (D).Prunus virginiana
- 下列何種原型藥(prototype)可以發展成解熱鎮痛藥物Ibuprofen?(A).Salicin (B).Khellin (C).Guaiacol (D).Ephedrine
- 進行hydrocortisone錠劑分析,欲避免極性賦形劑之干擾,下列何種型態之固相萃取管柱(solid-phase extraction cartridge)最適合用來萃取hydro
- 張愛玲在〈天才夢〉中說:「生命是一襲華美的袍,爬滿了蚤子」,意謂生命是:(A)苦樂相參 (B)骯髒不堪 (C)苦盡甘來 (D)樂極生悲
- 45 The author suggests that to design the story-telling tasks with equal difficulty, we should p
- 下列何種含強心苷(cardiac glycosides)之生藥,一般充當毒鼠藥用途?(A).Black hellebore (B).Red squill (C).Dog bane (D
- 下列何者之學名與科名一致且為澱粉的主要來源?(A).Leuconostoc mesenteroides L. (Fam. Poaceae) (B).Solanum tuberosum
- 下列何種參數會降低層析管的效率?(A).適當提升溫度 (B).固定相顆粒小 (C).固定相覆蓋厚 (D).在移動相中擴散率小
- 四、於已知標準差為 5 之常態分布母體中隨機取 25 樣本,得平均值為 80,再於另一個已知標準差為 3 之常態分布母體中取 36 樣本,得平均值為 75。試求 µ1 − µ 2之 95%信賴區間。(
- 46 The passage is taken out from a paper on _____.(A) the difficulty of speaking English (B) the
- 大蒜具有特殊氣味,下列何者為其主成分?(A).Alliin (B).Allicin (C).Ajoene (D).Algin
- 下列何種樹膠(gum)具有假塑性的特性(pseudoplastic properties),常應用於牙膏和軟膏? (A).Agar (B).Guar gum (C).Pectin (
- 以液相層析法分析含有不同吸光波長的多種化合物的檢品時,下列何者為最適合的檢測器?(A).UV detector (B).Electrochemical detector (C).Flu
- 二、試繪圖說明對向水準測量(Reciprocal leveling)施測之方法、目的以及適合之地理地形環境。(20 分)
- People nowadays speak often about their “right” to health. Paying a lot for the medicine and nationa