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23 Cards in this Set
- Front
- Back
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What could cause an AC electric motor to run too fast? |
Excessive applied voltage or shorted field windings |
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What tool is used to check a motor or generator armature for shorts and opens under load conditions? |
A Growler |
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When using a growler, what indication will occur when a short exists between an armature segment? |
When a metal blade is held over the armature and a short exist in a segment, the blade will begin to vibrate and chatter. |
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How is the output voltage of an alternator controlled? |
By varying the field current that excites the alternator |
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What instruments are used to monitor electrical system loads? |
Ammeters and voltmeters |
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How would you identify a specific wire in a wire bundle? |
By the identification code marked on The wire |
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What tool would you use to determine the size of an unmarked wire? |
A wire gauge |
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What color are the navigation lights on the wing tips? |
The left wing tip is red, the right is green |
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Name several types of electrical devices that would be considered intermittent loads on an electrical system |
Landing gear, Cowl and flap motors, radio transmitters |
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Why would it be necessary to analyze an electrical system before increasing the load on the system? |
To determine that the generator capacity, wire size, and protective device capacity will not be exceeded |
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What factors should be considered when determining the wire size for a particular application? |
the system voltage, permissible voltage drop, current to be carried, wire length and whether the load is continuous or intermittent |
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What is the relationship between the inside diameter of a conduit in the outside diameter of the wire bundle inside it? |
The conduit must be 25% larger than the wire bundle |
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What is the maximum number of terminal lugs that can be placed on a single terminal strip stud? |
Four |
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What is the proper length for a bounding jumper? |
As short as practical, but long enough to allow free movement of the component |
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Under what conditions must have switch PD rated from its nominal rating? |
When used in with inductive circuits, circuits with high in-rush current, and with DC motors |
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At what point do electric motors draw the most current? |
When starting |
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Circuit breakers are designed to open before what condition occurs? |
Before the wire emits smoke |
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At what point in a circuit should the protective device be located |
As close to the power source as possible |
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What type of circuit breaker may not be used in aircraft? |
An automatic resetting type |
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What part of an aircraft is identified by a white navigation light? |
The tail |
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What what could cause an AC electric motor to run too slowly |
Lack of lubrication, defective wiring, or low plug voltage |
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What should be done when making bonding or grounding connections between dissimilar materials? |
Use a suitable washer so that any corrosion will occur on the washer |
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Prior to making a continuity check, what must be done to an electrical circuit? |
The power must be turned off |
