A.brushes
B.slip rings
C.commutators
D.all of the above
您可能感興趣的試卷
你可能感興趣的試題
A.is usual
B.is not usual
C.is necessary
D.is not impossible
A.protective earth
B.isolators
C.ground switch
D.circuit-breakers
A.a closed loop control system
B.an open loop control system
C.a boiler control system
D.a steering gear control system
A.a manual closed loop
B.a manual opened loop
C.an automatic closed loop
D.an automatic opened loop
A.the absolute pressure
B.the gauge pressure
C.the vacuum pressure
D.the differential pressure
最新試題
For a given exhaust gas boiler, what is the quantity of its evaporation mainly determined?（）
（） is not installed on the main switchboar.
As soon as a diesel engine has started, which of the listed engine operating parameters should be checked FIRST?（）
The shipboard oil pollution emergency plan will be invalid after （）
To shut down a diesel engine after it exceeds the set maximum speed，which type of device listed should be used?（）
The Port State Control officer may witness a fire drill carried out by the crew assigned to these duties on the（）
To proceed to the assistance of a ship in distress is（）
The cetane rating of diesel fuel is an indication of the （）
Under MARPOL Code the ship to which it applies has to carry （）
Cold weather starting of a diesel engine may be made easier by（）