單項選擇題An electrical device which prevents an action from occurring until all other required conditions are met is called a/an （）.
A.limit
B.monitor
C.modulator
D.interlock
您可能感興趣的試卷
你可能感興趣的試題
1.單項選擇題The frequency output of an operating alternator is controlled by the （）.
A.relative speed of the rotor poles
B.number of turns of wire in the armature coil
C.strength of the magnets used
D.output voltage
2.單項選擇題The greatest detrimental effect on idle electrical equipment, such as cargo pump motors, is the（）.
A.loss of residual magnetism
B.absorption of moisture in the insulation
C.insulation varnish flaking
D.dirt collecting on the windings
最新試題
A purge recovery system is used in a centrifugal air conditioning or refrigeration system to （）
題型：單項選擇題
Using a file without a handle may result in （）
題型：單項選擇題
Thermostatic steam pressure reducing valves are used in the fuel oil service system to control the（）
題型：單項選擇題
（）are used to digest the sewage to produce innocuous sludge in a biological sewage treatment plant.
題型：單項選擇題
The condensers located in various stages of a flash evaporator are cooled by（）
題型：單項選擇題