单项选择题
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
点击查看答案&解析
相关考题
-
单项选择题
The operation of paralleling two alternators requires the voltages to be （）and also in phase.
A.zero
B.eliminated
C.different
D.equal -
单项选择题
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 -
单项选择题
The overcurrent relay （） the motor contactor when the motor exceeds its rated current.
A.connects
B.trips
C.fouls
D.destructs
