单项选择题
A.The breaker should be closed when one synchronizing lamp is dark and the other is bright
B.The breaker should be closed when both synchronizing lamps are bright
C.The frequency meter should be used to determine that the incoming alternator frequency is slightly higher than the bus
D.A portable phase sequence indicator must be used to verify the information from the lamps
单项选择题 A vessel is equipped with two ships service generatorsGenerator #1 is rated at 900kw and generator #2 is rated at 600kw.During parallel operation, with a hotel load of 1000kw, what should be the kw load on generator #2 （）.
单项选择题 The energy consumed by an AC motor, as strictly reactive power, is （）
单项选择题 A diesel driven emergency generator is prevented from being paralleled with the ships service generators by （）