單項(xiàng)選擇題Any electric motor can be constructed to be（）.
A.short proof
B.ground proof
C.explosion proof
D.overload proof
您可能感興趣的試卷
你可能感興趣的試題
1.單項(xiàng)選擇題Current changing in direction and rising and falling in value is （）.
A.AC
B.DC
C.generator
D.fresh water generator
2.單項(xiàng)選擇題The output voltage of a three-phase alternator is regulated by the （）.
A.AC voltage to the armature
B.AC voltage to the field
C.DC voltage to the armature
D.DC voltage to the field
最新試題
For a given exhaust gas boiler, what is the quantity of its evaporation mainly determined?（）
題型：單項(xiàng)選擇題
The cetane rating of diesel fuel is an indication of the （）
題型：單項(xiàng)選擇題
“Insufficiency of manning or insufficiency of certification of seafarers” is an identification of a（）
題型：單項(xiàng)選擇題
The condensers located in various stages of a flash evaporator are cooled by（）
題型：單項(xiàng)選擇題
（）are used to digest the sewage to produce innocuous sludge in a biological sewage treatment plant.
題型：單項(xiàng)選擇題