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Which property of the valve resists the tensile loads and stem wear?(a) Strength(b) Hardness(c) Both strength and hardness(d) ToughnessI got this question during an internship interview.Question is taken from Poppet Valves in section Valve Timing Technologies of Automotive Engine Design

Answer»

The correct choice is (C) Both strength and hardness

Best explanation: Exhaust VALVE material requires high strength and hardness to resist tensile LOADS and STEM wear. High hot strength and hardness to combat head cupping and wear of SEATS.



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