A.steel
B.aluminum
C.glass
D.copper
您可能感興趣的試卷
你可能感興趣的試題
A.suspended by wire slings in one comer of the shop
B.wrapped in several layers of heavy paper or carboard
C.supported by flat wood blocks on the workbench
D.returned to the frame as soon as the bearings are removed
A.frequency
B.number of phases
C.phase rotation
D.All of the above
A.rotor
B.stator
C.exciter
D.armature
A.coulombs per second
B.revolutions per second
C.revolutions per minute
D.cycles per second
A.slightly less than the oncoming generator frequency
B.the same as the bus frequency
C.slightly greater than the bus frequency
D.the same as the bus voltage
最新試題
Cold weather starting of a diesel engine may be made easier by()
Engine parameters shall be corresponded to NOx Technical Files. This is required by ()
The shipboard oil pollution emergency plan will be invalid after ()
As soon as a diesel engine has started, which of the listed engine operating parameters should be checked FIRST?()
One of the reasons that cause oil flowed from sludge outlet of a self-cleaning separator is()
Refrigerant entering the compressor of a refrigeration system should be in which of the following conditions?()
If two A.C.generators are to be operated in parallel, the load is distributed evenly by()
During the diesel engine running, the water level of F.W expansion tank should normally kept in the () level of glass tube.
The condensers located in various stages of a flash evaporator are cooled by()
Which one is NOT the ‘clear grounds’ for a more detailed inspection?()