Powerplant - Electrical Systems Flashcards
Where is the generator rating and performance data located?
It is stamped on the nameplate attached to the generator
What method is used to control the voltage of an aircraft regulator?
The voltage regulator
How is alternator frequency maintained?
By installing the constant speed drive (CSD) unit between the engine and the alternator
Name the parts of a DC motor
The armature, the field, the brushes and frame
What is the American wire gauge (AWG) system of designating electrical wire size?
The gauge number is assigned to the wire according to its cross sectional area
What is open wiring?
Any wire, wire group or wire bundle not enclosed in a conduit
What are the causes of excess arcing at the generator brushes?
A commutator that is dirty, rough, out of round, worn or binding brushes or the brush tension is too low
When installing single wires or wire bundles, how much slack is normally allowed between supports?
slack between supports should normally not exceed 1/2 inch
What precautions should be taken when running wires close to heating ducts or exhaust stacks?
The wires should be insulated with a high temperature material
When is it necessary to replace the brushes in a starter?
Once they reach half their original length
What units make up a DC generator three unit regulator?
The voltage regulator, current limiter, and the revers current cutout
What determines the frequency of the voltage of an alternator?
The frequency depends upon the speed of rotation of the rotor and the number of poles.
What are the three basic types of DC motors?
Series motors, Shunt motors, and compound motors
Why should stranded wire be used in powerplant operations?
It is less likely to fatigue and break from vibrations
What methods are used to control the voltage output of a DC aircraft generator?
The vibrating type voltage regulator, three unit regulator, and carbon pile
