Hardening MCQs + Explanations
Quick revision for PSC: soaking time, tempering, case hardening stages, carburizing, nitriding and induction hardening.
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Quick revision for PSC: soaking time, tempering, case hardening stages, carburizing, nitriding and induction hardening.
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Revise fast: tempering, annealing, critical temperatures, soaking and quenching media — with answers & short explanations.
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Quick revision for PSC: purpose of annealing, temperature ranges for hypo/hyper-eutectoid steels, soaking duration, cooling rate, and normalising temperature.
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Quick revision for PSC: carbon content range, white cast iron (abrasion resistance), chilled iron formation, weldability, nodular/ductile iron, and alloying grey cast iron for toughness.
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Quick revision for PSC: copper (ores, properties, alloys, melting point), brass & bronze ranges, lead and babbitt metal, zinc (galvanising), tin (cassiterite), aluminium (bauxite) and why it’s used in aircraft.
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Quick revision for PSC: blast furnace, coke, flux, tuyeres, pig iron, wrought iron, puddling process and Aston process.
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