固定裝置,其接地故障環路阻抗任何一點,雖在多久自動斷電動?

筆試補充練 2 - B

Quiz
•
World Languages
•
10th Grade
•
Hard
Charlene Cher
FREE Resource
95 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
3秒
4秒
5秒
6秒
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
下列那一類不可作接地極用途:
鋼地樁
銅接地帶
銅接地極
鋼水喉
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
香港發電廠採用____發電?
火力
水力
風力
核能
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
臨時供電的總掣,需在下列那種情況跳脫?
過大電阻及電飯
過大電線及配件
漏電及短路
沒有警句情況下
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
導體的絕緣物,需抵受下列那一項?
機械及電氣應力
熱力
化學應力
以上全對
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
直接埋藏在行人路的電纜最少距離地面多深?
500毫米
350毫米
400毫米
450毫米
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
沿牆或結構物表面的電纜,用扣帶固定,其直徑不可超過____毫米
10
15
20
25
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