Answer Happy

Given that the down-sprue of a sand mould is 10cm long, its cross-sectional area at the base is 3cm and the mould volume is 0.0013m2, consider the flow of molten steel into the mould and use Equations (5-7) to answer Questions 41 to 43. Assume the acceleration due to gravity is 9.8ms? You are expected to know the meaning of the symbols in the equations. (Hint: pay careful attention to the units in these questions). = A.V (5) tms =V/Q96 V= V2gh EG (7) Determine the velocity of flow at the bottom of the down-sprue. Calculate your answer in the units of cm/s then choose the closest option given below. a. 77 b. 1.9 c. 140 d. 56 18 f. 210 Determine the volumetric Flow rate into the mould. Calculate your answer in the units of cm's , then choose the option closest to your answer. a. 690 b. 75 C. 7 d. 420 c. 52 f. 321 Find the mould fill time. Calculate your answer in the units of seconds, then choose the option closest to your answer. a. 178 b. 55 C. 14.2 d. 9.3 e. 5.5 f. 0.093