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Cards In This Set
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What is the purpose of a circuit breaker?
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Protect the circuits and wires from fire.
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What are the factors to be considered when selecting wire size for electrical power?
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Allowable Power loss.Permissible Voltage drop.Current-carrying ability of the conductor.
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When is a circuit breaker or fuse designed to open the circuit?
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Before the conductor emits smoke.
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What type of breakers are not acceptable for use in aircraft?
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Auto-reset breakers.
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What are the three most common faults that occur in an electrical circuit?
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Open Circuits.Shorted Circuits.Low Power.
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What size electrical conduit should be used for a specific cable bundle?
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25% larger than the maximum diameter of the conductor bundle.
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When should electrical switches be de-rated from their normal current rating?
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For high rush-in circuits and inductive circuits.
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What would cause an AC electrical motor to run too fast?
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An excessive supply of voltage or motor field windings shorted.
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What would cause an AC electrical motor to run too slow?
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Low applied voltage, defective wiring or no Lubrication.
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How is the output voltage of an alternator controlled?
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A voltage regulator.
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What should be checked before any aircraft load is increased?
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The Wires, Conductors, and Circuit Breakers/Fuses should be checked to determine the new load will not exceed the rated limits.
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What is the main advantage of using AC for electrical power systems?
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The voltage is easily changed by the use of transformers.
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In AC power systems, how is DC obtained for battery charging?
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By the use of rectifiers.
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How long should bonding jumper wires be made?
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Large enough to handle all the return current flow and short enough to prevent an increase in resistance.
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