(WRITE THE RIGHT ANSWER IN THE TABLE BELOW) UE OR FALSE (ONE MARK EACH, TOTAL 20 MARKS 1. properties is by preheating the weld area prior to welding. (The weld metal structure has poor mechanical properties and one way to control these 2. 3. 4. ) The major advantages of spot welding process, such as not requiring shielding gases, or flux. One of the limitations of Shell molding is that it is more expensive than investment casting. T) Cutting is often used as a tolerances, surface textures and geometrical features that cannot be produced by casting, forming or powder primary manufacturing process to produce dimensional processing. 5. () In Spot welding, Faying surfaces is another name for the contact area between electrodes and the work piece. 6. cooling of the hot forging, allowing the forging of complex shapes, particularly with thin and deep recesses. (T) In drop hammer process, the speed are high; therefore the high forming times minimize (T) Turning and drilling are both machining processes in which a single point cutting tool is 7. utilized. 8. () In open die forging, flash is formed by metal that flows beyond die cavity into small gap between die plates. 9. () The metal removal rate in turning is proportional to feed rate and the average diameter of the work piece. 10. (T) In spot welding. Resistance welding (RW) covers a number of processes in which the heat required for welding is produced by means of the frictional heat between the two members to be joint. 11. (T) Cutting can be economically used as a primary manufacturing process if production volumes or material costs are low. 12. () Forging denotes a family of processes by which plastic deformation of the workpiece is carried out by tensile forces 13. ) In forging, filling and flash occur when work piece volume is greater than the cavity volume. () Direct extrusion (forward extrusion): the die moves toward the billet; thus, except at the die, 14. there is no relative motion at the billet-container interface.