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Which of the followings is the formula for calculating the choke area (A)?(a) 2W/dtC√2gh(b) W/dtC√2gh(c) W²/dtC√2gh(d) 2W³/dtC√2gh |
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Answer» The correct option is (b) W/dtC√2gh Easiest explanation: Choke area (A) = W/dtC√2gh, It is the main control area which meters the metal flow into the mould cavity so that the mould is completely filled within the calculated pouring time. Its unit is mm². Where, W = Casting mass (kg), t = pouring time (second), d = mass density (kg/mm³), h = Sprue height (mm), g = Acceleration due to gravity (mm/s²), C = Efficiency factor. |
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