Practice # 8 AC & DC Generation

What type of current do DC generators produce?

• Alternating current (AC)

• Direct current (DC)

• Pulsating current (PC)

• Static current (SC)

What completes the magnetic circuit between the poles in a DC generator?

• Field frame

• Armature

• Commutator

• Stator

What is the relationship between armature coils and the generation of electricity in a DC generator?

• Armature coils are stationary and do not affect electricity generation.

• Armature coils rotate in a magnetic field to induce voltage and generate electricity.

• Armature coils only serve as a support structure for the generator.

• Armature coils are used to store electricity generated by the generator.

What is the main advantage of using a shunt generator in applications?

• It provides stable voltage output under varying load conditions.

• It is more efficient than series generators.

• It requires less maintenance than other types of generators.

• It can operate at higher temperatures without failure.

What additional component does a three unit regulator for DC generator systems include besides a voltage regulator?

• Current limiter.

• Power inverter.

• Voltage transformer.

• Frequency modulator.

How does a shunt generator differ from other types of DC generators?

• It has a field winding connected in series with the load.

• It has a field winding connected in parallel with the load.

• It has a field winding that is not connected to the load.

• It has a field winding that is adjustable.

What does a voltage regulator adjust in a DC generator?

• The voltage output by altering the amount of current flowing to the generator's field windings.

• The speed of the generator's rotor to increase power output.

• The temperature of the generator to prevent overheating.

• The frequency of the electrical output to match grid requirements.

What is a DC generator with a field winding connected in parallel with the external circuit called?

• Series generator

• Shunt generator

• Compound generator

• Self-excited generator

What is the purpose of a commutator in a DC generator?

• To convert alternating current (AC) generated in the armature to direct current (DC).

• To increase the voltage output of the generator.

• To reduce the friction in the generator's moving parts.

• To regulate the temperature of the generator.

What components make up the armature assembly of a generator?

• A single copper wire wrapped around a plastic core

• Many armature coils wound on an iron core, a commutator, and associated mechanical parts.

• A series of magnets and a battery

• A rotor and a stator with no additional components.