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Which of the following methods is used for the cutting of directionally solidified rods or castings?(a) Thermal cutting(b) Electro-discharge machining(c) Water jet cutting(d) Weld cutting |
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Answer» Correct option is (b) Electro-discharge machining Explanation: The directionally solidified castings are cut transversely and longitudinally by the application of electro-discharge machining. In this method, material is removed from the work-piece by discharging of current between the electrodes, results in an electric voltage. This method is also known as spark machining. |
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