Engineering Materials Admiralty brass used for steam condenser tubes contains copper and zinc in the following ratio 2.9375 30 : 70 40 : 60 2.1180555555556 2.9375 30 : 70 40 : 60 2.1180555555556 ANSWER DOWNLOAD EXAMIANS APP
Engineering Materials The machinability of aluminium increases when _________ is added to aluminium. Magnesium Lead and bismuth Copper Silicon Magnesium Lead and bismuth Copper Silicon ANSWER DOWNLOAD EXAMIANS APP
Engineering Materials Free carbon in iron makes the metal Soft and gives a fine grained crystalline structure Soft and gives a coarse grained crystalline structure Hard and gives a fine grained crystalline structure Hard and gives a coarse grained crystalline structure Soft and gives a fine grained crystalline structure Soft and gives a coarse grained crystalline structure Hard and gives a fine grained crystalline structure Hard and gives a coarse grained crystalline structure ANSWER DOWNLOAD EXAMIANS APP
Engineering Materials Sulphur in steel Lowers the toughness and transverse ductility Acts as deoxidiser Decreases tensile strength and hardness Reduces the grain size Lowers the toughness and transverse ductility Acts as deoxidiser Decreases tensile strength and hardness Reduces the grain size ANSWER DOWNLOAD EXAMIANS APP
Engineering Materials Vanadium in high speed steels Provides high hot hardness Forms very hard carbides and thus increases wear resistance Promotes retention of austenite Promotes decarburisation Provides high hot hardness Forms very hard carbides and thus increases wear resistance Promotes retention of austenite Promotes decarburisation ANSWER DOWNLOAD EXAMIANS APP
Engineering Materials The temperature at which ferromagnetic alpha iron transforms to paramagnetic alpha iron is 770°C 1050°C 910°C Below recrystallization temperature 770°C 1050°C 910°C Below recrystallization temperature ANSWER DOWNLOAD EXAMIANS APP
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