Engineering Materials A material is known as allotropic or polymorphic if it Exists in several crystal forms at different temperatures Has a fixed structure under all conditions Has its atoms distributed in a random pattern Responds to heat treatment Exists in several crystal forms at different temperatures Has a fixed structure under all conditions Has its atoms distributed in a random pattern Responds to heat treatment ANSWER DOWNLOAD EXAMIANS APP
Engineering Materials In full annealing, the hypo eutectoid steel is heated from 30°C to 50°C above the upper critical temperature and then cooled Slowly in the furnace Any one of these In still air Suddenly in a suitable cooling medium Slowly in the furnace Any one of these In still air Suddenly in a suitable cooling medium ANSWER DOWNLOAD EXAMIANS APP
Engineering Materials When medium carbon steel is heated to coarsening 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 Points of arrest for iron correspond to Stages at which allotropic forms change Stages at which further heating does not increase temperature for some time Stages at which properties do not change with increase in temperature There is nothing like points of arrest Stages at which allotropic forms change Stages at which further heating does not increase temperature for some time Stages at which properties do not change with increase in temperature There is nothing like points of arrest ANSWER DOWNLOAD EXAMIANS APP
Engineering Materials Aluminium bronze contains aluminium and copper in the ratio of 0.47916666666667 2.5277777777778 40 : 60 2.1180555555556 0.47916666666667 2.5277777777778 40 : 60 2.1180555555556 ANSWER DOWNLOAD EXAMIANS APP
Engineering Materials High carbon steel carries carbon percentage 0.3 to 0.6% 0.1 to 0.3% 0.6 to 0.8% 0.8 to 1.5% 0.3 to 0.6% 0.1 to 0.3% 0.6 to 0.8% 0.8 to 1.5% ANSWER DOWNLOAD EXAMIANS APP
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