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

Trades & Technology

You might also like to view...

Which of the following lamp types need a ballast to operate? Select all that apply.

A) Incandescent. B) Fluorescent. C) LED D) High intensity discharge.

Trades & Technology

What term do we usually apply to sources of energy other than fossil fuels used to produce electricity? List some examples

What will be an ideal response?

Trades & Technology

A(n) ____________________ is used to draw attention to large items such as machines, cabinets, and

floors.

Fill in the blank(s) with the appropriate word(s).

Trades & Technology

The volume of gas varies inversely with the absolute pressure, provided the temperature remains constant. This is called ____.

A. Charles' Law B. Tom's Law C. Boyle's Law D. Dalton's Law

Trades & Technology