NON DESTRUCTIVE TESTING MCQs – Chapter 3 DAE

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1. Magnetic process can be used for:





2. The process in which iron sulphide is converted into iron oxide is called:





3. Process in which some minerals are converted to oxide by heating in air at temperature below their melting point is called:





4. In froth floatation bubbles are produced by:





5. In calcination process ______ gas is evolved:





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