8. A solid model of a gating system is shown in Figure Qn 8. B Casting Figure Qn 8 (i) State names of the components labelled A to E (5 marks) (ii) Elaborate on the function of component E. (3 marks) 9. In casting experiments performed using a certain alloy and type of sand mold, it took 30 sec for a cube-shaped casting to solidify. The cube was 75 mm on a side. Solidification time of casting can be estimated by Chvorinov's Rule shown in Equation 2: Solidification time = C( Volume Surface Area, Equation 2 (i) Determine the value C of the mold constant in Chvorinov's Rule for the alloy and sand mold. Specify the units of C for full marks. (3 marks) (ii) A cylindrical casting with diameter D = 15 mm and L = 75 mm is to be made from the same alloy and mold type. Calculate the solidification time of the cylindrical casting. (7 marks)

Fig: 1