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

<strike id="hjm9f"></strike>

單項(xiàng)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

你可能感興趣的試題

單項(xiàng)選擇題

The （） is a measure of the phase difference between voltage and current and is expected as the cosine of phase angle.

A.power
B.efficiency
C.effective power
D.power factor

單項(xiàng)選擇題

The overcurrent relay （） the motor contactor when the motor exceeds its rated current.

A.connects
B.trips
C.fouls
D.destructs

<ins id="cjjsn"></ins>