电路板断路器
电路板控制器
电路板装置
电路板箱
第1题：
An alternator is being paralleled with one on the line At the instant the circuit breaker is close, the frequency of the incoming alternator will normally
A.increase
B.not change
C.decrease
D.be exactly 60 hertz
第2题：
A circuit breaker and a fuse have a basic similarity in that they both______.
A.can be reset to energize the circuit
B.should open the circuit when overloaded
C.will burn out when an over current flow develops
D.should short the circuit when overloaded
第3题：
A.completely loose its share of the load causing the auxiliary engine to speed up.
B.overload due to reduced voltage output and increased current
C.continue to share the active load(kw)but have high very reactive load
D.try to take all the load and so trip the main circuit breaker
第4题：
文献注释有哪些主要名称术语，有何含义？传：意为转述，阐明经义。
第5题：
If an attempt is made to hoist a load that exceeds the capacity of an electric winch，an overload safety device causes a circuit breaker to cut off the current to the winch motor ______．
A.when the line pull reaches the rated winch capacity
B.after the line pull exceeds the rated winch capacity
C.after a short build-up of torque
D.immediately
第6题：
A circuit breaker and a fuse have a basic similarity(类似) in that they both ______.
A.can be reset to energize the circuit
B.should open the circuit when overloaded
C.will burn out when an over current flow develops
D.should short the circuit when overloaded
第7题：
A circuit breaker differs from a fuse in that a circuit breaker ______.
A.melts and must be replaced
B.is enclosed in a tube of insulating material with metal ferrules(环) at each end
C.gives no visual indication of having opened the circuit
D.trips to break the circuit and may be reset
第8题：
A.higher than the bus equency
B.lower than the bus equency
C.the same as the bus frequency but out of phase with it
D.same as the bus frequency and the circuit breaker may be closed at
第9题：
SWITCH主空开闭合测试，设置P2.9.3.1 Allow breaker test为（），设置P2.9.3.2 Force breaker为（）
第10题：
术语Circuit breaker意为（）。