Term
| WHAT ARE THREE REQUIREMENTS FOR A REPAIR TO A PIECE OF SHEET METAL AIRCRAFT STRUCTURE? |
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Definition
| RESTORE THE LOST STRENGTH AND RIGIDTY, MUST NOT CHANGE AERODYNAMIC SHAPE |
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Term
| WHEN MAKING A RIVETED REPAIR TO AN AIRCRAFT SHEET METAL STRUCTURE, WHICH SHOULD BE STRONGER, THE SHEAR STRENGTH OF THE RIVET OR THE BEARING STRENGTH OF THE METAL SHEETING? |
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Definition
| BEARING STRENGTH SHOULD BE GREATER BUT BOTH CLOSE TOGETHER. |
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Term
| WHAT KIND OF STRESS IS IN THE UPPER SKIN OF AN AIRCRAFT WING IN FLIGHT? |
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Definition
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Term
| WHAT TYPE OF DEVICE IS A CLECO FASTENER? |
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Definition
| TEMPORARY FASTENER USED TO HOLD TWO PIECES OF SHEET METAL TOGETHER UNTIL THEY CAN BE RIVETED. |
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Term
| WHAT IS THE MAIN PURPOSE OF THROATLESS SHEARS IN AN AIRCRAFT SHEET METAL SHOP? |
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Definition
| THEY CAN BE USED TO CUT IRREGULAR CURVES IN THE METAL. |
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Term
| WHAT IS THE PURPOSE OF A SIGHT LINE WHEN LAYING OUT SHEETMETAL TO BE BENT IN A CORNICE BRAKE? |
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Definition
| SO YOU CAN POSITION THE JAWS OF THE CORNICE BRAKE TO START AT THE BEND TANGENT LINE. |
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Term
| WHAT KIND OF METAL FORMING IS DONE BY A SLIP ROLL FORMER? |
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Definition
| SIMPLE CURVES WITH A LARGE RADIUS. |
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Term
| WHAT KIND OF METAL FORMING IS DONE BY BUMPING? |
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Definition
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Term
| WHAT MUST BE DONE TO THE FLANGES OF AN ANGLE FOR IS TO BE CURVED? |
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Definition
| THE FLANGES MUST BE STRETCHED FOR CONVEX CURVE AND SHRUNK FOR A CONCAVE CURVE. |
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Term
| WHAT IS MEANT BY BEND ALLOWANCE USED IN MAKING A BEND IN A PIECE OF SHEET METAL? |
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Definition
| THE AMOUNT OF METAL THAT IS ACTUALLY USED IN MAKING THE BEND IN A PIECE OF SHEET METAL. |
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Term
| WHAT DETERMINES THE MINUMUM BEND RADIUS THAT CAN BE USED WITH A PIECE OF SHEET METAL? |
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Definition
| THE THICKNESS AND HARDNESS OF THE MATERIAL |
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Term
| WHAT IS MEANT BY SETBACK WHEN BENDING A PIECE OF SHEET METAL USING A CORNICE BRAKE? |
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Definition
| THE DISTANCE THE JAWS OF THE BRAKE MUST BE SET BACK FROM THE MOLD LINE TO FORM THE BEND. |
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Term
| WHY ARE THE LIGHTNING HOLES IN A SHEET METAL WING RIB FLANGED? |
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Definition
| TO GIVE THE RIB RIGIDITY. |
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Term
| WHEN HAND FORMING A PIECE OF SHEET METAL THAT HAS A CONCAVE CURVE, SHOULD THE FORMING BE STARTED IN THE CENTER OF THE CURVE OR AT ITS EDGES? |
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Definition
| START AT THE EDGES AND WORK TOWARDS THE CENTER. |
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Term
| WHAT IS MEANT BY A JOGGLE IN A PIECE OF SHEET METAL? |
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Definition
| A SMALL OFFSET NEAR THE EDGE OF A PIECE OF SHEET METAL THAT ALLOWS THE SHEET TO OVERLAP ANOTHER PIECE OF METAL. |
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Term
| WHEN DRILLING STAINLESS STEEL SHOULD THE DRILL BE TURNED FAST OR SLOW? |
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Definition
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Term
| WHAT IS THE MINIMUM EDGE DISTANCE ALLOWED WHEN INSTALLING RIVETS IN A PIECE OF AIRCRAFT SHEET METAL STRUCTURE? |
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Definition
| TWO TIME THE DIAMETER OF THE RIVET. |
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Term
| WHAT IS THE RECOMMENDED TRANSVERSE PITCH TO USE WHEN MAKING A RIVETED TWO-ROW SPLICE IN A PIECE OF SHEET METAL? |
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Definition
| 3/4ths OF THE PITCH IN THE ROWS. |
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Term
| WHY SHOULD ALUMINUM ALLOY RIVETS BE DRIVEN WITH AS FEW BLOWS AS PRACTICLE? |
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Definition
| EXCESSIVE HAMMERING WILL WORK-HARDEN THE RIVETS AND MAKE THEM DIFFICULT TO DRIVE. |
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Term
| WHAT DETERMINES WHETHER A PIECE OF SHEET METAL SHOULD BE DIMPLED OR COUNTER SUNK WHEN INSTALLING FLUSH RIVET? |
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Definition
| THE THICKNESS OF THE SHEETING. COUNTERSINKING SHOULD ONLY BE DONE WHEN THE THICKNESS OF THE SHEET IS GREATER THEN THE THICKNESS OF THE RIVET HEAD. |
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Term
| WHAT TYPE OF METAL SHOULD BE HOT-DIMPLED? |
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Definition
| 7075-T6, 2024-T81 ALUMINUM ALLOY AND MAGNESIUM ALLOYS. |
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Term
| WHAT KIND OF REPAIR CAN BE MADE TO SMALL DAMAGE OF THE CORE MATERIAL AND ONE FACE SHEET OF A PIECE OF ALUMINUM ALLOY HONEYCOMB STRUCTURE? |
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Definition
| A POTTED COMPOUND REPAIR. |
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Term
| WHAT SPECIAL PRECAUTIONS MUST BE TAKEN WHEN REPAIRING A RADOME? |
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Definition
| NOTHING MUST BE DONE TO THE RADOME THAT WILL AFFECT ITS ELECTRICAL TRANSPARENCY OR ITS AERODYNAMIC STRENGTH. |
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Term
| HOW IS THE POINT OF A TWIST DRILL GROUND THAT IS USED FOR DRILLING TRANSPARENT ACRYLIC MATERIAL? |
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Definition
| THE CUTTING EDGE SHOULD BE DUBBED OFF TO A ZERO RAKE ANGLE AND TIP ANGLE SHOULD BE GROUND TO 140 DEGREES. |
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Term
| WHAT CAUSES CRAZING IN A PIECE OF TRANSPARENT ACRYLIC MATERIAL? |
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Definition
| UNEVEN STRESS CAUSED BY HEAT. |
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Term
| WHAT IS THE PURPOSE OF ANODIZING A PIECE OF ALUMINUM ALLOY AND HOW IS IT APPLIED? |
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Definition
| PROVIDES PROTECTIVE OXIDE FILM, APPLIED BY AN ELECTROLYTIC PROCESS. |
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