Engineering Materials A material is known as allotropic or polymorphic if it Responds to heat treatment Has a fixed structure under all conditions Has its atoms distributed in a random pattern Exists in several crystal forms at different temperatures Responds to heat treatment Has a fixed structure under all conditions Has its atoms distributed in a random pattern Exists in several crystal forms at different temperatures ANSWER DOWNLOAD EXAMIANS APP
Engineering Materials When low carbon steel is heated up to lower critical temperature The grain size first increases and then decreases very rapidly The average grain size is a minimum The grain size increases very rapidly There is no change in grain size The grain size first increases and then decreases very rapidly The average grain size is a minimum The grain size increases very rapidly There is no change in grain size ANSWER DOWNLOAD EXAMIANS APP
Engineering Materials The ability of a material to resist softening at high temperature is known as Hot hardness Creep Fatigue Hot tempering Hot hardness Creep Fatigue Hot tempering ANSWER DOWNLOAD EXAMIANS APP
Engineering Materials Hardness of martensite is about RC 65 RC 57 RC 80 RC 48 RC 65 RC 57 RC 80 RC 48 ANSWER DOWNLOAD EXAMIANS APP
Engineering Materials Drop forging dies contain carbon of the order of 0.1 to 0.2% 0.7 to 0.9% 0.6 to 0.7% 0.25 to 0.5% 0.1 to 0.2% 0.7 to 0.9% 0.6 to 0.7% 0.25 to 0.5% ANSWER DOWNLOAD EXAMIANS APP
Engineering Materials Cementite consist of 13% carbon and 87% ferrite 13% ferrite and 87% cementite 6.67% carbon and 93.33% iron 13% cementite and 87% ferrite 13% carbon and 87% ferrite 13% ferrite and 87% cementite 6.67% carbon and 93.33% iron 13% cementite and 87% ferrite ANSWER DOWNLOAD EXAMIANS APP
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