单项选择题
A.Accommodation heating system B.Steering gear C.Boiler control D.Cargo control
The operation of （） two alternators requires the voltag...
单项选择题The operation of （） two alternators requires the voltages to be equal and also in phase.
A.paralleling B.series-mounting C.running D.control
With a purely （） load the voltage and current are in ph...
单项选择题With a purely （） load the voltage and current are in phase, giving a power factor of one.
A.inductive B.resistance C.combined D.capacitate
The separate supplies are connected in either star or d...
单项选择题The separate supplies are connected in either star or delta formationThe star formation is most commonly used and requires（） slip-rings on the alternator.
A.two B.three C.four D.five
