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 （）.
A.100kw B.400kw C.500kw D.600kw
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 （）
单项选择题 A motor enclosure which protects against falling liquids is classified as （）
