Term
| WHAT TWO THINGS MUST YOU TAKE INTO CONSIDERATION WHEN SELECTING THE WIRE SIZE TO USE IN AN AIRCRAFT ELECTRICAL SYSTEM INSTALLATION? |
|
Definition
- CURRENT CARRYING CAPABILITY
- ALLOWABLE VOLTAGE DROP CAUSED BY THE CURRENT FLOWING THROUGH THE WIRE.
|
|
|
Term
| WHAT IS THE MAXIMUM NUMBER OF WIRES THAT SHOULD BE CONNECTED TO ANY SINGLE STUD ON A TURMINAL STRIP? |
|
Definition
|
|
Term
| HOW IS A WIRE BUNDLE PROTECTED FROM CHAFING WHERE THE BUNDLE GOES THROUGH A HOLE IN A FUSELAGE FRAME OR BULKHEAD? |
|
Definition
| A FLEXIBLE GROMET AND CUSHIONED CLAMPS. |
|
|
Term
| WHAT KIND OF CLAMP IS USED TO SECURE A WIRE BUNDLE TO THE AIRCRAFT STRUCTURE? |
|
Definition
|
|
Term
| WHY ARE SOLDERLESS SPLICES USUALLY BETTER THAN SOLDERED SPLICES IN THE WIRING OF AN AIRCRAFT ELECTRICAL SYSTEM? |
|
Definition
| WITH SOLDERED SPLICES, THE VIBRATION CAN HARDEN AND BREAK THE WIRE, SOLDERLESS SPLICES WERE DESIGNED TO KEEP THE JOINT FLEXIBLE. |
|
|
Term
| WHAT SIZE GENERATOR SHOULD BE USED IN AN AIRCRAFT ELECTRICAL SYSTEM IF THE CONNECTED ELECTRICAL LOAD IS 30amps AND THERE IS NO WAY OF MONITORING THE GENERATOR OUTPUT? |
|
Definition
| WHEN MONITORING IS NOT PRACTICAL THE TOTAL CONTINUOUSLY CONNECTED ELECTRICAL LOAD MUST BE NO MORE THAN 80% OF THE RATED GENERATOR OUTPUT. THIS WOULD REQUIRE A GENERATOR WITH A RATING 37.5 AMPS, PRACTIALLY A 40AMP GENERATOR WOULD BE USED. |
|
|
Term
| WHY MUST A SWITCH BE DERATED IF IT IS USED IN A CIRCUIT THAT SUPPLIES INCANDESCENT LAMPS? |
|
Definition
| THE HIGH INRUSH CURRENT CAUSED BY THE LOW RESISTANCE OF THE COLD FILAMENTS. |
|
|
Term
| ON WHICH WING IS THE RED NAVIGATION LIGHT? |
|
Definition
|
|
Term
| WHAT KIND OF FAULT CAN BE FOUND IN A GENERATOR ARMATURE WITH A GROWLER TEST? |
|
Definition
|
|
Term
| DOES AN AIRCRAFT ELECTRIC STARTER USE A SERIES OR A PARALLEL MOTOR? |
|
Definition
|
|
Term
| WHAT IS THE MAIN DISADVANTAGE OF ALUMINUM WIRE OVER COPPER WIRE FOR USE IN AN AIRCRAFT ELECTRICAL SYSTEM? |
|
Definition
| IT IS MORE BRITTLE THAN COPPER WIRE. |
|
|
Term
| WHAT KIND OF RECTIFIER IS USED IN THE SMALL DC ALTERNATORS INSTALLED IN MOST LIGHT AIRCRAFT? |
|
Definition
| THREE-PHASE (SIX SILICON DIODE) FULL WAVE RECTIFIER. |
|
|
Term
| WHAT KIND OF INSTRUMENT WOULD YOU USE TO MEASURE VERY HIGH RESISTANCE? |
|
Definition
|
|
Term
| WHEN IS IT IMPORTANT THAT AIRCRAFT ELECTRICAL SYSTEMWIRE BUNDLES BE ENCLOSED IN SOME TYPE OF CONDUIT? |
|
Definition
| ANY TIME ITS ROUTED IN AN AREA WHERE IT IS SUBJECT TO ABRASION OR ROUGH HANDLING. |
|
|
Term
| WHAT SIZE ALUMINUM WIRE WOULD BE PROPER TO REPLACE A PIECE OF FOUR-GAGE COPPER WIRE? |
|
Definition
| TWO-GAGE. WHEN SUBSTITUTING ALUMINUM FOR COPPER, USE TWO GAGE NUMBERS LARGER. |
|
|
Term
| WHAT IS THE SMALLEST SIZE ALUMINUM WIRE THAT IS APPROVED FOR USE IN AIRCRAFT ELECTRICAL SYSTEMS? |
|
Definition
|
|
Term
| WHAT TRHEE THINGS MUST BE SYNCHRONIZED BEFORE AN AIRCRAFT AC GENERATOR IS PLACED ON THE SAME BUS WITH ANOTHER AC GENERATOR? |
|
Definition
| THE VOLTAGE, FREQUENCY, AND PHASE ROTATION. |
|
|
Term
| HOW CAN THE DIRECTION OF ROTATION OF THE ARMATURE OF A DC SHUNT-WOUND ELECTRIC MOTOR BE REVERSED? |
|
Definition
| BY REVERSING THE CONNECTIONS TO THE SHUNT FEILD COIL WITH REFERENCE TO THE ARMATURE. |
|
|
Term
| WHAT IS MEANT BY FLASHING THE FIELD OF A GENERATOR? |
|
Definition
| RESTORING THE RESIDUAL MAGNATISM TO THE FRAME OF THE GENERATOR. THIS IS DONE BY PASSING BATTERY CURRENT THROUGH THE FIELD COILS IN THE DIRECTION IT NORMALLY FLOWS WHEN THE GENERATOR IS OPERATING. |
|
|
