Question 1 (10 points) (CLO 1, CLO 2, CLO 3, CLO 4) Multiple choices Question. (a) Tubes can be manufactured by o hot forging o hot spinning o hot extrusion o hot rolling (b) Which of the following is true for hot extrusion o less force is required in forward extrusion as compared to backward extrusion o more force is required in forward extrusion as compared to backward extrusion same force is applied in both forward and backward extrusion any of the above o o (c) If the degree of drawing (reduction) is 0.5 and the initial area is 100mm then the final area in mm is equal to 50 O O 60 (d) In which of the following process the work piece is pulled through a die resulting in reduction of area? 40 000 Forging Drawing Forming Extrusion necking (e) Which of the following process is used to convert larger sections, such as ingots into smaller sections O hot rolling hot forging hot spinning hot extrusion (f) In rolling, at point of maximum pressure metal moves slower than the roll surface both metal and roll surface moves at same speed any of the above can be possible metal moves faster than the roll surface (g) Impregnation refers to which of the following O (h) The process carried out in powder metallurgy is as follows i. preparation of powder ii. Grading of powder iii. Compacting of powder iv. Sintering O O filling the pores of the PM part with a molten metal, soaking oil by capillary action into the pores of a PM part something that should not happen in a factory None of the above The correct sequence is i, iii, ii, iv i, ii, iii, iv iii, i, ii, iv ii, i, iii, iv (i) Punching a number of holes in a sheet is known as: Perforating Parting Notching Lancing (i) A circular sheet-metal slug produced in a hole punching operation will have the same diameter as 1000 O the die opening. the punch Both None