DC Motor Quiz

What is a DC motor?

• An electrical machine that converts mechanical energy into electrical energy

• A device that stores electrical energy

• An electrical machine that converts electrical energy into mechanical energy

• A machine that generates electricity

What is a key benefit of DC motors in production equipment?

• They are lightweight

• They can start, stop, and reverse instantly

• They require less maintenance

• They consume less power

What is the primary function of a DC motor?

• To generate heat

• To convert electrical energy into mechanical energy

• To store energy

• To reduce noise

What are the brushes in a brush DC motor typically made of?

• Plastic

• Metal

• Carbon

• Wood

In a separately excited DC motor, what is true about the armature and field windings?

• They share the same electrical supply

• They are electrically independent

• They are connected in series

• They are connected in parallel

What is the main difference between separately excited and self-excited DC motors?

• The type of magnets used

• The electrical independence of windings

• The size of the motor

• The cost of the motor

What is the result of the configuration in a shunt-wound DC motor?

• Variable speed with mechanical load

• Constant speed despite changes in mechanical load

• Increased torque with increased load

• Decreased efficiency with increased load

What type of voltage can a series-wound DC motor operate with?

• Only AC voltage

• Only DC voltage

• Both AC and DC voltage

• No voltage

What is a key feature of a brushless DC motor (BLDC)?

• It has brushes

• It operates only on AC voltage

• It does not have brushes

• It cannot be used in industrial applications

How do BLDC motors produce rotational torque?

• By using mechanical brushes

• By changing the phase currents

• By varying the voltage

• By altering the frequency