MSE 200 NCSU test 1, Questions and answers, rated A+. latest update.

MSE 200 NCSU test 1, Questions and answers, rated A+. latest update. The number of atoms that touch an atom in the center of a body-centered cubic (bcc) - -8 The shortest distance between atoms in a face-centered cubic (FCC) crystal is in the direction - -110 A combination of vacancy and interstitial of a cation is called - -Frenkel defect The ABABAB stacking sequence is present in - -hexagonal close packed The structure that is close packed is - -FCC and HCP A grain boundary is an example of a - -surface defect Permanent deformation occurs by - -motion of dislocations Structures are classified into crystal systems according to - -coordination number The conservation of energy is given by - -gradient of concentration Identify the solid with higher melting point based on the E vs. r graph - -The solid with bigger hump Identify the solid with shortest equilibrium distance between ions on the E vs. r graph - -the solid with the skinnier hump The number of grains observed in a microscope in 1 sq. inch at a magnification of 100x is 64. The ASTM grain size index is - -7 What miller indices of direction start at the origin and move in the positive x and z directions - -[101] What miller indices of direction start at +z and move in the -z direction and + x and y direction - -[11-1] The structure that gold atoms take up is - -Face Centered Cubic Iron crystallizes in a body-centered-cubic (BCC) lattice with a lattice constant of a_0 of .287nm and has an atomic weight of 55.85 g/mol. The atomic radius for iron in nm is - -.124 The depth of the carburized layer after high temperature carburization for 1 hour at 600 celsius is 2 micrometers in steel. If the same process is done but for two hours at 700 celsius the depth of the carburized layer is 4 micrometers. The average distance travelled by an atom in carburization is given by - -one-dimensional diffusion Diffusion coefficient of carbon at 600 celsius and 700 celsius respectively in steel are - -.56e-11 and 1.1e-11 cm^2/sec activation energy for diffusion of carbon is - -.444 eV/K The diffusion of nickel in iron takes place by - -vacancy mechanism Diffusion of carbon in iron takes place via - -interstitial mechanism diffusion of nickel atoms in copper with FCC structure takes place along - -face diagonals The activation energy for diffusion of carbon in iron compared to that of diffusion of nickel in iron will be - -smaller