Engineering Materials In a hardening process, the hypo-eutectoid steel is Heated from 30°C to 50°C above the upper critical temperature and then cooled in still air Heated from 30°C to 50°C above the upper critical temperature and then cooled suddenly in a suitable cooling medium Heated from 30°C to 50°C above the upper critical temperature and then cooled slowly in the furnace Heated below or closes to the lower critical temperature and then cooled slowly Heated from 30°C to 50°C above the upper critical temperature and then cooled in still air Heated from 30°C to 50°C above the upper critical temperature and then cooled suddenly in a suitable cooling medium Heated from 30°C to 50°C above the upper critical temperature and then cooled slowly in the furnace Heated below or closes to the lower critical temperature and then cooled slowly ANSWER DOWNLOAD EXAMIANS APP
Engineering Materials When low carbon steel is heated up to upper critical temperature There is no change in grain size The grain size first increases and then decreases very rapidly The grain size increases very rapidly The average grain size is a minimum There is no change in grain size The grain size first increases and then decreases very rapidly The grain size increases very rapidly The average grain size is a minimum ANSWER DOWNLOAD EXAMIANS APP
Engineering Materials Vanadium in high speed steels Forms very hard carbides and thus increases wear resistance Promotes retention of austenite Provides high hot hardness Promotes decarburisation Forms very hard carbides and thus increases wear resistance Promotes retention of austenite Provides high hot hardness Promotes decarburisation ANSWER DOWNLOAD EXAMIANS APP
Engineering Materials The ability of a material to absorb energy in the plastic range is called Creep Resilience Toughness Fatigue strength Creep Resilience Toughness Fatigue strength ANSWER DOWNLOAD EXAMIANS APP
Engineering Materials The machinability of steel is improved by adding Chromium Nickel and chromium Nickel Sulphur, lead and phosphorus Chromium Nickel and chromium Nickel Sulphur, lead and phosphorus ANSWER DOWNLOAD EXAMIANS APP
Engineering Materials Induction hardening is the process of Heating and cooling rapidly Hardening surface of work-piece to obtain hard and wear resistant surface Inducing hardness by continuous process Increasing hardness throughout Heating and cooling rapidly Hardening surface of work-piece to obtain hard and wear resistant surface Inducing hardness by continuous process Increasing hardness throughout ANSWER DOWNLOAD EXAMIANS APP
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