Engineering Materials A material is known as allotropic or polymorphic if it 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 Responds to heat treatment ANSWER DOWNLOAD EXAMIANS APP
Engineering Materials When medium carbon steel is heated to coarsening temperature The average grain size is a minimum The grain size first increases and then decreases very rapidly The grain size increases very rapidly There is no change in grain size The average grain size is a minimum The grain size first increases and then decreases very rapidly The grain size increases very rapidly There is no change in grain size ANSWER DOWNLOAD EXAMIANS APP
Engineering Materials Cemented carbide tools are not found to be suitable for cutting Steel Brass Cast iron Aluminium Steel Brass Cast iron Aluminium ANSWER DOWNLOAD EXAMIANS APP
Engineering Materials In which of the following cases, consideration of creep is important Cycle chains Cast iron pipes Flywheel of steam engine Gas turbine blades Cycle chains Cast iron pipes Flywheel of steam engine Gas turbine blades ANSWER DOWNLOAD EXAMIANS APP
Engineering Materials The unit cells All of these May be defined as the smallest parallelepiped which could be transposed in three coordinate directions to build up the space lattice Have the same orientation and their similar faces are parallel Contain the smallest number of atoms which when taken together have all the properties of the crystals of the particular metal All of these May be defined as the smallest parallelepiped which could be transposed in three coordinate directions to build up the space lattice Have the same orientation and their similar faces are parallel Contain the smallest number of atoms which when taken together have all the properties of the crystals of the particular metal ANSWER DOWNLOAD EXAMIANS APP
Engineering Materials The alloying element which reduces the formation of iron sulphide in steel is Vanadium Nickel Manganese Chromium Vanadium Nickel Manganese Chromium ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS