97免费在线观看视频,亚洲综合自拍网,黄色毛片免费观看,热久久综合网,免费看日产一区二区三区狠狠操av,久久久涩涩涩,在线精品免费视频,人人插天天干,久久91精品国产91久久

<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>