<progress id="figxe"></progress>

<video id="figxe"><th id="figxe"></th></video>

單項選擇題

When current and voltage reach maximum values at the same time, the power factor is（）

A.minimum
B.maximum
C.leading
D.lagging

你可能感興趣的試題

單項選擇題

Which is an acceptable means of correcting high mica between commutator bars?（）

A.undercutting
B.sanding
C.burnishing
D.filing

單項選擇題

Generator brushes are staggered to（）

A.reduce current pulsations
B.reduce brush chatter
C.prevent uneven commutator wear
D.allow greater power generation

<table id="gqezp"><legend id="gqezp"><ins id="gqezp"></ins></legend></table>