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Q. Describe the Selection of elctrodes?
The selection of a proper electrode for electric arc welding is very important to obtain a sound welded joint of proper strength. The various factors affecting the selection of electrodes are:
• Power source: A.C. or D.C.
• Composition of base metal.
• Thickness of base metal.
• Welding position.
• Welding current conditions recommended by the manufacturer of the electrodes.
• Mechanical properties desired in the joint.
• Extent of penetration required in welding.
• Economic considerations.
Q. Show the tensile properties of material? Tensile properties indicate how the material will react to forces being applied in tension. A tensile test is a fundamental mechanic
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In Grey Cast Iron, carbon is present in ------------form while in white cast iron, it is found in ----------- form.
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Maintenance of Bridges and Culverts: Careful inspection of bridges and culverts at periodic intervals can detect cracks, foundation settlement, scour, malfunction of bearings
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