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OP Electrical S
| Question | Answer |
|---|---|
| What would cause an AC electric motor to run to fast? | Excessive applied voltage or shorted field windings. |
| What tool is used to check a motor or generator armature for shorts and opens under load conditions? | A growler. |
| When using a growler what indication will there be if a short exists between the armature segments? | A metal blade placed on the armature the blade will vibrate and chatter. |
| How is the output voltage of an alternator controlled? | By varying the field current that excites the alternator. |
| What instruments are used to monitor electrical system loads? | Ammeters and Voltmeters. |
| How would you identify a specific wire in a wire bundle? | By the identification code marked on the wire. |
| What tool would you use to determine the size of an unmarked wire? | A wire gauge. |
| What color are the navigation lights on the wing tips? | Left is red. Right is green. |
| Name several types of electrical devices that would be considered intermittent loads on a system? | Landing gear, cowl and flap motors, Radio transmitters. |
| Why would it be necessary to analyze an electrical system before increasing the load on the system? | To determine the generator capacity, wire size and protective device capacity will not be exceeded? |
| What factors should be considered when determining wire size for a particular application? | System voltage, allowable voltage drops, current to be carried, wire length and whether load is continuous or intermittent. |
| What is the relationship between the inside diameter of a conduit and the outside diameter of a wire bundle? | The conduit should be 25% larger. |
| What is the maximum number of terminal lugs that can be installed on one terminal strip stud. | 4 |
| What is the proper length for a bonding jumper? | As short as possible but long enough to allow free movement of the component. |
| Under what condition must a switch be derated from its nominal rating? | When used with inductive circuits, circuits with high in rush current, and with dc motors. |
| At what point do electric motors draw the most current? | When starting. |
| Circuit breakers are designed to open before what conditions occur? | Before the wire emits smoke. |
| At what point in a circuit should the protective devices be located? | As close to the power source as possible. |
| What type of circuit breaker may not be used on aircraft. | Automatic reset circuit breaker. |
| What part of the aircraft is identified by a white navigation light? | Tail. |
| What could cause an AC electric motor to run to slowly | Lack of lubrication, defective wiring, or low applied voltage. |
| What should be done when making bonding or grounding connections between dissimilar metals. | Use a suitable washer so the corrosion will occur ont the washer. |
| Prior to making a continuity check, what must be done to an electrical circuit? | Power must be off. |
Created by:
g153511
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