6. Crimping is a. a method to reduce thickness of bars b. a process that joins p

Question

6. Crimping is a. a method to reduce thickness of bars b. a process that joins plastic pipes by melting amechanical joining process that does not use fasteners d. joining process that folds two thin pieces of material together 7. In cutting operations, continuous chips are usually formed with ductile materials at a. high cutting speed and/or low rake angle b. low cutting speed and/or low rake angle c. high cutting speed and/or high rake angle d. low cutting speed and/or high rake angle 8. One of the main advantages of the forging process is that a it produsces productswith curate dimensions bit produses prodfh c. it produces products with less defects d. it produces products with good strength and toughness 9. One of the most important factors affecting the shearing process is a. die shape b clearance c. diameter of workpiece d. burr 10. The main difference between open-die forging and impression-die forging is that in impression-die forging barrelling will be formed that open-die forging can only be used with hard metals a. b. that in impression-die forging the workpiece acquires the shape of the die cavities while being forged between two shaped dies d. that in open-die forging flash will be formed 11.Welding electrodes are coated with flux to a. provide a shielding gas in the weld area b. protect welding area from oxygen in the environment c. deoxidize the weld area d. all of the above

Explanation / Answer

6)c crimping is a mechanical joining process that does not use fastners. Pieces are joined by deformation of one or all the pieces.

7)a continuous chips are formed when cutting speed is high and rake angle is low.

8)D forging products have good mechanical property like strength,toughness but surface finish of products is not good.

9)b clearance is very important for shearing operation clearance is provided on either punch or die.

10)c in closed die or impression die forging workpiece take the shape of die while in open die forging repeated hammer blows are used to make required shape.

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