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AIRFRAME ORALS
CHAPTER 7 - AIRFRAME ELECTRICAL SYSTEMS
| Question | Answer |
|---|---|
| WHAT COULD CAUSE AN -AC- ELECTRIC MOTOR TO RUN TOO 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? | GROWLER. |
| 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 EXISTS IN A SEGMENT, THE BLADE WILL BEGIN TO 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 SYSTEMS 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 WINGTIPS? | THE LEFT WINGTIP IS RED, THE RIGHT IS GREEN. |
| NAME SEVERAL TYPES OF ELECTRICAL DEVICES THAT WOULD BE CONSIDERED INTERMITTENT LOADS ON AN ELECTRICAL SYSTEM. | LANDING GEAR, COWL AND WING FLAP MOTORS, RADIO TRANSMITTERS. |
| 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. |
| 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. |
| WHAT IS THE RELATIONSHIP BETWEEN THE INSIDE DIAMETER OF A CONDUIT AND THE OUTSIDE DIAMETER OF THE WIRE BUNDLE INSIDE IT? | THE CONDUIT MUST BE 25% LARGER THAN THE WIRE BUNDLE. |
| WHAT IS THE MAXIMUM NUMBER OF TERMINAL LUGS THAT CAN BE PLACED ON A SINGLE TERMINAL STRIP STUD? | FOUR. |
| WHAT IS THE PROPER LENGTH FOR A BONDING JUMPER? | AS SHORT AS PRACTICAL, BUT LONG ENOUGH TO ALLOW FREE MOVEMENT OF THE COMPONENT. |
| UNDER WHAT CONDITIONS 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 CONDITION OCCURS? | BEFORE THE WIRE EMITS SMOKE. |
| AT WHAT POINT IN A CIRCUIT SHOULD THE PROTECTIVE DEVICE BE LOCATED? | AS CLOSE TO THE POWER SOURCE AS POSSIBLE? |
| WHAT TYPE OF CIRCUIT BREAKER MAY NOT BE USED IN AN AIRCRAFT? | AN AUTOMATIC RESETTING TYPE. |
| WHAT PART OF AN AIRCRAFT IS IDENTIFIED BY A WHITE NAVIGATION LIGHT? | THE TAIL. |
| WHAT COULD CAUSE AN AC ELECTRIC MOTOR TO RUN TOO SLOWLY? | LACK OF LUBRICATION, DEFECTIVE WIRING, OR LOW APPLIED VOLTAGE. |
| 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. |
| PRIOR TO MAKING A CONTINUITY CHECK, WHAT MUST BE TURNED OFF? | THE POWER MUST BE TURNED OFF. |
Created by:
brookburns34924
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