Assignment No. 1 1. The joint offering maximum reliability is a. Riveted joint b. Adhesive joint c. Weld joint d. Solder joint Correct Answer – c. Weld Joint 2. Fundamental mechanism of solid state joining process involves a. Plastic deformation b. Diffusion c. Chemical interaction d. Epitaxial growth Correct Answer – b. Plastic Deformation 3. Welding process does not use filler is a. Gas tungsten arc welding b. Laser welding c. Spot welding d. Submerged arc welding Correct Answer – c. Spot welding 4. One of the following welding process offers maximum power density is a. Gas welding b. Plasma arc welding c. Submerged arc welding d. Shielded metal arc Correct Answer – b. Plasma Arc welding 5. Controlled environment of Vacuum is commonly used for welding by a. Laser welding b. Electron beam welding c. Seam welding d. Electrogas welding Correct Answer – b. Electron beam welding 6. Welding process which uses molten flux for protection of the weld metal from the atmospheric gases is a. Electrogas welding b. Electron beam welding c. Submerged arc welding d. Gas metal arc welding Correct Answer – c. Submerged arc welding 7. In oxy-acetylene flame more heat is generated in a. Inner cone b. Outer cone c. Inner-outer cone interface d. Uniform in the entire flame Correct Answer – b. Outer core 8. Increase in energy density of a welding processes leads to a. Increase in distortion tendency of the weld joint b. Coarsening of microstructure of the weld metal c. Reduction in welding speed d. Reduction in width of HAZ Correct Answer – d. Reduction in width of HAZ 9. Cleanest weld metal is produced by a. Gas metal arc welding process b. Shielded metal arc welding c. Submerged arc welding d. Gas tungsten arc welding Correct Answer – d. Gas Tungsten arc welding 10. Autogenous weld can be produced by a. Gas tungsten arc welding b. Gas metal arc welding c. Submerged arc welding d. Electroslag welding Correct Answer – a. Gas Tungsten arc welding .