Engineering Materials A reversible change in the atomic structure of steel with corresponding change in the properties is known as Molecular change Solidus change Allotropic change Physical change Molecular change Solidus change Allotropic change Physical change ANSWER DOWNLOAD EXAMIANS APP
Engineering Materials Chilled cast iron has Graphite as its basic constituent of composition No graphite A very high percentage of graphite A low percentage of graphite Graphite as its basic constituent of composition No graphite A very high percentage of graphite A low percentage of graphite ANSWER DOWNLOAD EXAMIANS APP
Engineering Materials Mild steel belongs to the following category Alloy steel Medium carbon steel Low carbon steel High carbon steel Alloy steel Medium carbon steel Low carbon steel High carbon steel ANSWER DOWNLOAD EXAMIANS APP
Engineering Materials Which of the following constituents of steels is softest and least strong? Ferrite Austenite Cementite Pearlite Ferrite Austenite Cementite Pearlite ANSWER DOWNLOAD EXAMIANS APP
Engineering Materials Steel contains Alloying elements like chromium, tungsten nickel and copper 80% or more iron Elements like phosphorus, sulphur and silicon in varying quantities 50% or more iron Alloying elements like chromium, tungsten nickel and copper 80% or more iron Elements like phosphorus, sulphur and silicon in varying quantities 50% or more iron ANSWER DOWNLOAD EXAMIANS APP
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 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 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 from 30°C to 50°C above the upper critical temperature and then cooled in still air 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 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 ANSWER DOWNLOAD EXAMIANS APP
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