99色精品-9色在线-99色在线-99色视频国产欧美日产一区二区三区_亚洲精品亚洲人成在线观看_四虎在线精品永久观看_免费一级a一片久久精

單項選擇題

The star-delta starter is an effective method of （） voltage starting of a motor.

A.increased
B.reduced
C.unchanged
D.None of the above

你可能感興趣的試題

單項選擇題

The （）, cage rotor induction motor is the first choice marine motor in most modern ships because of its electrical and mechanical simplicity.

A.single phase
B.two phase
C.three phase
D.four phase

單項選擇題

The operation of paralleling two alternators requires the voltages to be （）and also in phase.

A.zero
B.eliminated
C.different
D.equal

<ruby id="xmb4j"><output id="xmb4j"></output></ruby>

<dl id="xmb4j"><legend id="xmb4j"><input id="xmb4j"></input></legend></dl>