Answer the following statement(s) true (T) or false (F)
1. A DC motor is reversed by reversing the shunt field current.
2. In a DC reversing motor, the forward and reverse buttons are mechanically interlocked so that it is not possible to operate these buttons at the same time.
3. In a CEMF controller, braking action increases as the armature speed decreases.
4. When using the CEMF controller and dynamic braking, a field discharge resistor must be added.
5. A field discharge resistor is a thyristor-type device that conducts when the voltage across it is high enough, but has a high resistance to normal line voltage.
1. FALSE
2. TRUE
3. FALSE
4. TRUE
5. TRUE
You might also like to view...
Given the voltage polarity and negative value shown below, what is the actual direction of current through the resistor?
A. from left to right B. from right to left C. in both directions simultaneously D. no current is flowing
Dynamic RAMs store information by using
A) latches. B) flip-flops. C) magnetism. D) capacitors.
In some companies the safety and health manager might be a person who has other duties.