絕緣技術(shù)監(jiān)督上崗員廠用電設(shè)備技術(shù)監(jiān)督單項(xiàng)選擇題每日一練(2019.01.15)

A.1/2
B.1/3
C.2/3
D.3/4

A.一相電源斷開
B.電壓低
C.電壓過低

A.1/2
B.1/3
C.2/3
D.3/4

A.三個(gè)恒定磁場(chǎng)
B.三個(gè)脈振磁場(chǎng)
C.三個(gè)旋轉(zhuǎn)磁場(chǎng)

A.稍高
B.稍低
C.相等