A.higher than the bus frequency
B.lower than the bus freouencv
C.the same as the bus frequency but out of phase with it
D.the same as the bus frequency, and the circuit breaker may be closed at any pointer position
您可能感興趣的試卷
你可能感興趣的試題
A.visual inspection for dirt accumulation
B.high megger readings
C.low operating temperature
D.the time period since the last cleaning
A.capacitive circuit
B.inductive circuit
C.magnetic circuit
D.resistive circuit
A.phase angle
B.frequency
C.wave form
D.half mode
A.vibration
B.watertight integrity
C.speed droop
D.reactive power
A.frequency meter
B.voltage regulator
C.governor control
D.sychroscope switch
最新試題
The shipboard oil pollution emergency plan will be invalid after （）
To proceed to the assistance of a ship in distress is（）
Flame failure in an automatically fired auxiliary boiler can from a/an （）
A purge recovery system is used in a centrifugal air conditioning or refrigeration system to （）
（） is not installed on the main switchboar.
Which of the following items don’t belong to dock repair works?（）
（）are used to digest the sewage to produce innocuous sludge in a biological sewage treatment plant.
Using a file without a handle may result in （）
The Port State Control officer may witness a fire drill carried out by the crew assigned to these duties on the（）
As soon as a diesel engine has started, which of the listed engine operating parameters should be checked FIRST?（）