单项选择题

Why is it desirable to operate paralleled AC generators at the same power factor?（）

A.Circulating currents are kept to a minimum
B.Field excitation losses are kept to a minimum
C.Generator rotors will have a lesser tendency to hunt
D.Because a power factor increase will decrease kilowatt output

点击查看答案&解析

上一题目录下一题

相关考题

单项选择题

An ammeter should be used to measure （）

A.the voltage between two points in a circuit
B.circuit continuity
C.current flow in a circuit
D.total or partial circuit resistance

单项选择题

When the voltage remains constant and the resistance is increased in a series circuit, the flow of current （）

A.increases by the square of the original value
B.increases
C.remains the same
D.decreases

单项选择题

The power factor of an AC generator operating singularly is determined by the （）

A.connected load
B.prime mover speed
C.field excitation
D.generators rated voltage