Flashcards on Aircraft Electrical Systems: Principles and Maintenance
Aircraft Electrical Systems: Principles and Maintenance Guide
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Aircraft electrical systems
23 cards
Card 1
Question: What three things must be synchronized before connecting a three-phase AC generator to a bus already served by another generator?
Answer: Voltage, frequency, and phase rotation of the generators.
Card 2
Question: What is an IDG (integrated drive unit)?
Answer: A unit that combines the AC generator and CSD (constant-speed drive) into a single unit.
Card 3
Question: What device is used to maintain a constant frequency from an AC alternator driven by a turbine engine?
Answer: A hydraulic constant-speed drive unit between the engine and the alternator.
Card 4
Question: What must be done to reverse the direction of rotation of the armature in a DC motor?
Answer: Reverse the current flow through either the armature or the field windings, but not both.
Card 5
Question: Does a series-wound DC motor have high or low starting torque?
Answer: A high starting torque.
Card 6
Question: Which aircraft electrical circuit normally does not contain a fuse or circuit breakers?
Answer: The starter motor circuit.
Card 7
Question: When removing an aircraft battery, which connection should be disconnected first?
Answer: The ground connection must be disconnected first and reconnected last.
Card 8
Question: What is a starter-generator described in the content for smaller gas turbine engines?
Answer: A single engine-mounted component that serves as a starter for starting the turbine engine and, when running, can be shifted to act as a compound-woun
Card 9
Question: When should aircraft wiring be installed in a conduit?
Answer: When the wiring passes through an area where open wiring could likely be damaged, such as through a wheel well.
Card 10
Question: How does a voltage regulator control the output voltage of a DC generator?
Answer: The regulator's relay field strength is proportional to generator output; if voltage rises above the set value the relay opens contacts and inserts a