Repair Engine Electrical System Components Flashcards
When should the brushes in a starter motor be replaced?
When they have worn to one half of their original length
How is the direction of rotation of a DC electric motor reversed?
Reverse the polarity of the armature or the field, but not both
How is the direction of rotation of a DC electric motor reversed?
Reverse the polarity of the armature or the field, but not both
What is used as the rectifier to produce direct current in a DC generator?
Brushes and a commutator
What is used as the rectifier to produce direct current in a DC alternator?
Six solid-state diodes
Is a starter motor series-wound or shunt-wound?
Series wound
What are two ways wires can be attached to the pins in a cannon plug?
Soldering and crimping
Why is standard wire used rather than solid wire. In most powerplant electrical systems?
Solid wire is likely to break when it is subjected to vibration
What two things must be considered in selection of wire size when making an electrical installation in an aircraft?
The current-carrying capability of the wire and the voltage drop caused by current flowing through the wire
What must be done to a DC generator after it has been overhauled before it can produce electricity?
The field must be flashed
Why is it not necessary to flash the field of a DC Alternator after it has been overhauled?
An alternator field is excited by battery current and residual voltage is not used to start the alternator producing current
