Engineering Materials Free carbon in iron makes the metal Hard and gives a coarse grained crystalline structure Soft and gives a coarse grained crystalline structure Hard and gives a fine grained crystalline structure Soft and gives a fine grained crystalline structure Hard and gives a coarse grained crystalline structure Soft and gives a coarse grained crystalline structure Hard and gives a fine grained crystalline structure Soft and gives a fine grained crystalline structure ANSWER DOWNLOAD EXAMIANS APP
Engineering Materials The presence of sulphur in pig iron makes It brittle The casting unsound It easily machinable It hard It brittle The casting unsound It easily machinable It hard ANSWER DOWNLOAD EXAMIANS APP
Engineering Materials Ball bearings are, usually, made from Medium carbon steel High carbon steel Chrome steel Low carbon steel Medium carbon steel High carbon steel Chrome steel Low carbon steel ANSWER DOWNLOAD EXAMIANS APP
Engineering Materials Vanadium in high speed steels Promotes retention of austenite Forms very hard carbides and thus increases wear resistance Provides high hot hardness Promotes decarburisation Promotes retention of austenite Forms very hard carbides and thus increases wear resistance Provides high hot hardness Promotes decarburisation ANSWER DOWNLOAD EXAMIANS APP
Engineering Materials Process of Austempering results in Formation of bainite structure Lamellar layers of carbide distributed throughout the structure Martenistic structure Carburised structure Formation of bainite structure Lamellar layers of carbide distributed throughout the structure Martenistic structure Carburised structure ANSWER DOWNLOAD EXAMIANS APP
Engineering Materials The percentage of carbon in grey iron castings usually varies between 5 to 7% 2.5 to 4.5% 0.012 0.5 to 1% 5 to 7% 2.5 to 4.5% 0.012 0.5 to 1% ANSWER DOWNLOAD EXAMIANS APP
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