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16.有關鑄模澆流道系統的敘述,下列何者不正確? (A)澆池(Pouringbasin)可讓部份雜質形成浮渣防止其流入模穴, 並有平緩金屬流的效果 (B)澆道(Sprue)又稱豎澆道,設於澆池的下方,
問題詳情
16.有關鑄模澆流道系統的敘述,下列何者不正確?
(A)澆池(Pouringbasin)可讓部份雜質形成浮渣防止其流入模穴,
並有平緩金屬流的效果
(B)澆道(Sprue)又稱豎澆道,設於澆池的下方,位置距離模穴邊約25mm處為理想
(C)冒口(Riser)通常設置於鑄件斷面最小處,提供金屬熔液凝固收
縮時所需補充量
(D)橫流道(Runner)主要功用在於輸送及均勻分配金屬熔液流入
模穴,並可減緩流速
參考答案
答案:C
統計:A:6,B:20,C:47,D:7,E:0
難度:適中
上一篇 :
15.有關澆鑄作業之敘述,下列何者正確? (A)起模針(Drawspike)的用途是製作通氣孔,使氣體易於排出 (B)澆鑄時,臉部應正對著澆口上方,以利辨識熔液流入模穴 (C)搗砂捶製過程是先從中心開
下一篇 :
17.有關金屬電弧銲(Metalinertgasarcwelding,MIG)的敘述,下列何 者不正確? (A)MIG電源機通常為交流定電壓式電銲機 (B)送線速度愈快則電流輸出愈大 (C)電弧電壓是
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19.依CNS表面粗糙度標準,若工程圖上標註6.3a,則代表實際表面粗糙度值為何? (A)6.3mm (B)0.63mm (C)0.063mm (D)0.0063mm
20.物件內部構造較複雜時,為了使視圖清晰易懂應加畫何種視圖? (A)輔助視圖 (B)虛擬視圖 (C)剖視圖 (D)轉正視圖
21.有關尺度標註所使用之指線的敘述,下列何者正確? (A)以粗實線繪製 (B)可作為尺度標註用 (C)專用於註解 (D)指示端的箭頭常用小黑圓點代替
4.Ekapluto is an unknown planet that has two moons in circular orbits. The table summarizes the hypo
33.雙極性接面電晶體(BJT)用於控制電路時,下列敘述何者錯誤? (A)摻雜濃度大小為E>B>C (B) (C)電流大小為(D)是一種固態半導體元件,可用於放大、開關、穩壓等功能
17.布林代數表示式 F(A,B,C)=,化簡後下列何者正確? (A) F(A,B,C)= (B) F(A,B,C)= (C) F(A,B,C)= (D) F(A,B,C)=
4.如圖(一)所示之電路,下列何者錯誤?(A)V1=V2 (B)(C)(D)
2. Before swimming, it’s important to do some warm-up exercises and _____ your body to reduce the ri
3. Doctors suggest people wear masks when being in a very _____ place where they find it difficult t
4. Some people waste lots of water by leaving the _____ running while brushing their teeth. (A) pit
5. Sorry, I’m not in the _____ to sit in a cinema now. Could we go for a walk instead? (A) boot (B)
6. Tom has been wearing the same smelly shirt for days; it’s time he does his _____ to have his clot
20. The Lineweaver-Burk plot of an enzyme without inhibitor is shown. Which dash line can represent
7. Jenny’s blood _____ always goes up when she gets angry, so she has to control herself. (A) founta
8. The singer hasn’t _____ any album for five years. Her fans are wondering where she is. (A) captur
9. Linda is very shy; there’s no way you can _____ her to give the speech even if you beg her to do
10. The food at this restaurant is _____! I will definitely come back soon. (A) annoying (B) fantast
11. It is important for hospitals to always keep their environment _____ so as to prevent the spread
12. The athlete loves working with kids and often _____ young football teams in his free time. (A) b
13. The illegal _____ of young elephants is common and many small elephants are sold and bought. (A)
14. Skydiving is the highlight of our holiday and many of us find it one of our best _____. (A) coll
15. People who have good _____ usually respect others and are more popular. (A) attitudes (B) citize
16. If you keep working _____, you will succeed one day because your hard work will bring you good r
17. Many professors were invited to the conference to help _____ the importance of preserving local