Term
| WHY IS TIG WELDING PREFERRED OVER OXYACETYLENE WELDING FOR BUILDING AN REPAIRING WELDED STEEL TUBE AIRCRAFT STRUCTURE? |
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Definition
| THE HEAT IS CONSENTRATED AND DOES NOT CAUSE AS MUCH DISTORTION. |
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Term
| WHAT ARE TWO TYPES OF ELECTRIC RESISTANCE WELDING USED IN AIRCRAFT CONSTRUCTION? |
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Definition
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Term
| WHY IS IT IMPORTANT THAT THE PRESSURE OF THE GAS IN AN ACETYLENE CYLINDER BE KEPT LOW? |
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Definition
| ACETYLENE GAS BECOMES UNSTABLE UNDER PRESSURE OF MORE THEN 15PSI. |
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Term
| WHAT DETERMINES THE AMOUNT OF HEAT THAT IS PUT INTO THE WELD BY AN OXYACETYLENE TORCH? |
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Definition
| THE SIZE OF THE ORFICE IN THE TORCH TIP. |
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Term
| WHAT IS THE DIFFERENCE IN APPEARANCE OF AN OXIDIZING FLAME, NEUTRAL FLAME, AND REDUCING FLAME PRODUCED BY AN OXY-ACETYLENE TORCH? |
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Definition
- OXIDIZING- POINTED INNER CONE
- NEUTRAL- ROUNDED INNER CONE
- REDUCING- DEFINITE FEATHER AROUND INNER CONE.
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Term
| WHAT IS MEANT BY TACK WELDING? |
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Definition
| THE USE OF SMALL WELDED SPOTS TO HOLD THE MATERIAL TOGETHER UNTIL THE FINAL BEAD IS RUN. |
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Term
| WHY MUST THICK PLATES OF METAL BE PREHEATED BEFORE THEY ARE WELDED? |
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Definition
| A METHOD OF CONTROLLING EXPANSION AND CONTRACTION OF THE METAL & MINIMIZES STRESS. |
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Term
| WHY IS IT IMPORTANT THAT ALL TRACES OF FLUX BE REMOVED AFTER A PIECE OF ALUMINUM OR MAGNESIUM IS WELDED? |
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Definition
| WELDING FLUX IS CORROSIVE. |
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Term
| WHAT IS THE FUNCTION OF THE INERT GAS THAT IS USED IN TIG AND MIG WELDING? |
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Definition
| THE INERT GAS KEEPS OXYGEN AWAY FROM THE WELD PUDDLE SO OXIDES CANNOT FORM AND WEAKEN THE WELD. |
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Term
| WHAT IS THE DIFFERENCE BETWEEN BRAZING AND WELDING? |
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Definition
- BRAZING- BASE METAL IS NOT MELTED, BUT IS COVERED WITH A LOW MELTING POINT ALLOY.
- WELDING- BASE METAL IS MELTED.
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Term
| WHAT IS USED AS AN ELECTRODE IN TIG WELDING? |
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Definition
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Term
| IS A HEAT-TREATED STEEL PART NORMALLY REPAIRABLE BY WELDING? |
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Definition
| NO, WELDING WILL DESTROY THE HEAT TREATMENT. |
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Term
| WHAT IS THE FUNCTION OF THE FLUX IN BRAZING AND SOLDERING? |
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Definition
| FLUX COVERS THE CLEANED AND HEATED METAL TO KEEP OXYGEN FROM IT. |
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Term
| WHAT KIND OF SOLDER IS RECOMMENDED FOR SOLDERING ELECTRICAL WIRES? |
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Definition
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Term
| WHAT KIND OF FLAME SHOULD BE USED WHEN GAS WELDING ALUMINUM? |
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Definition
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Term
| WHAT IS AN ACCEPTABLE ACETYLENE LINE PRESSURE TO USE WHEN WELDING WITH AND OXYACETYLENE RIG? |
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Definition
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Term
| WHAT TYPE OF FLAME SHOULD BE USED WHEN GAS WELDING STAINLESS STEEL? |
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Definition
| SLIGHTLY CARBURIZING FLAME. |
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Term
| HOW MUCH SHOULD THE BEAD PENETRATE THE MATERIAL WHEN WELDING TWO PIECES OF STEEL WITH A BUTT WELD? |
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Definition
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Term
| WHAT MUST BE DONE TO AN AIRCRAFT FUEL TANK BEFORE IS CAN BE REPAIRED BY WELDING? |
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Definition
| ALL FUMES MUST BE PURGED BY RUNNING LIVE STEAM THROUGH IT FOR AT LEAST 30 MINUTES, SOAKING IT IN HOT WATER, OR BY FILLING IT WITH NITROGEN OR CARBON DIOXIDE. |
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Term
| WHAT IS MEANT BY A SOFT FLAME? |
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Definition
| WHEN PRESSURES ARE LOW ENOUGH THAT THE FLAME DOESNT MAKE A NOISE OR BLOW THE PUDDLE |
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