单项选择题
A.blow out coils B.governor relay C.under voltage trips D.reverse current trips
The correct phase rotation of a three-phase alternator ...
单项选择题The correct phase rotation of a three-phase alternator can be checked with a（）
A.dynamometer B.power factor meter C.three-phase motor D.polyphase voltmeter
A probable cause for a turbo generator tripping out on ...
单项选择题A probable cause for a turbo generator tripping out on overspeed is a sudden（）
A.loss of field excitation B.total loss of load C.large increase in load D.loss of steam pressure
All of the following operating characteristics are list...
单项选择题All of the following operating characteristics are listed on the name-plates of motors used aboard ship except the（）
A.temperature rise B.input kilowatts C.horsepower D.operating voltage
