DC Motors and Generators Quiz

What is the primary function of compensating windings in DC motors?

• To increase the motor's speed

• To help interpoles maintain neutral position on the commutator

• To decrease the motor's power consumption

• To enhance the motor's torque

How can a DC motor be converted into a DC generator?

• By reversing the polarity of the armature winding

• By increasing the motor's speed

• By coupling an external prime mover to the motor shaft

• By reducing the current in the armature winding

What percentage of full-load torque can DC series motors develop upon starting?

• 100%

• 125%

• 150%

• 75%

Which type of DC motor is known for having lower starting torque?

• DC series motor

• DC shunt motor

• DC compound motor

• DC permanent-magnet motor

What is a characteristic feature of DC generators?

• They have a stationary field and a rotating armature

• They always overheat

• They have a rotating field and a stationary armature

• They cannot run continuously