Heat Treatment of steels MCQs – Chapter 4 DAE

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1. The main purpose of heat treatment of steel is to change:





2. Which of the following element in steel directly affects the critical temperature of the steel to be heat-treated:





3. The temperature and carbon content at which eutectoid reaction occurs in iron-carbon equilibrium diagram are:





4. The crystal structure of Austenite is:





5. Lower critical temperature of all steels are:





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