Practice # 8 AC & DC Generation

Front

What is the term for the distortion of the magnetic field caused by the current flowing through the armature in a DC generator?

Back

Armature reaction.

Front

What is the term for the speed at which most aircraft DC generators begin to produce their normal voltage, typically around 1,500 rpm?

Back

Coming in speed.

Front

What method can be used to restore residual magnetism in a DC generator that has lost it?

Back

Flashing the field.

Front

In a three-phase alternator, how much out of phase are the voltages induced in each winding?

Back

120°.

Front

What device acts like a starter during the start of a turbine-powered aircraft engine and functions as a generator when the engine is online?

Back

Starter generator.

Front

What is the primary function of a DC generator?

Back

To convert mechanical energy into direct current electrical energy.

Front

What is the role of the field windings in a DC generator?

Back

To create a magnetic field necessary for inducing voltage in the armature.

Front

What happens to the output voltage of a DC generator if the speed of the armature is increased?

Back

The output voltage increases.

Front

What is the significance of residual magnetism in a DC generator?

Back

It allows the generator to produce initial voltage upon startup.

Front

What is the difference between AC and DC generation?

Back

AC generation produces alternating current, while DC generation produces direct current.