
機材CH9習
Quiz
•
Professional Development
•
12th Grade
•
Practice Problem
•
Hard
mege mege
Used 4+ times
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24 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
下列銅的敘述何者有誤?
Answer explanation
自然銅及氧化銅的儲量少,世界上80%以上的銅是從硫化銅礦精煉出來的。
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
下列銅的敘述何者有誤?
Answer explanation
純銅的延展性僅次於金與銀。
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
下列銅的敘述何者有誤?
Answer explanation
鏡銅成分為銅佔2/3、錫佔1/3。
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
七三黃銅的合金含量是?
Answer explanation
七三黃銅含銅量約為70%,鋅約30%,展性大。
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
鑄造砲身的砲銅含錫量為?
Answer explanation
以含錫10%左右的青銅鑄造砲身俗稱砲銅。
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
享有色金屬彈性王美譽的是何種銅合金?
Answer explanation
鈹銅合金享有色金屬彈性王美譽。
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
地球上以何種金屬元素存量最多?
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