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
If separating effect is not good, which measure should be taken ()
The cetane rating of diesel fuel is an indication of the ()
“Insufficiency of manning or insufficiency of certification of seafarers” is an identification of a()
The flash point of a residual fuel oil should be used to determine the highest temperature to which oil may be heated()
Which of the listed governor characteristics will greatly affect the load sharing relationship between paralleled diesel generators?()
()connectors hold best if a wire is accidentally pulled or a connection becomes loose.
Engine parameters shall be corresponded to NOx Technical Files. This is required by ()
The main purpose of port State control is not to()
Refrigerant entering the compressor of a refrigeration system should be in which of the following conditions?()
Under MARPOL Code the ship to which it applies has to carry ()