Top 1000+ Solved Material Science MCQ Questions Answer
Q. Miller indices are the same for:
a. perpendicul a r planes
b. orthogon al planes
c. face plane
d. parall el plane s
Q. On application of thermal energy, a dislocation vanishes:
a. at thecrystal surface
b. at thenodal point
c. as a loop
d. both a and b
Q. Volume imperfections can be:
a. schottky\ s defect
b. twin
c. stacking fault
d. noncrystalli n e regions
Q. The cross-slip occures in:
a. climb up motion
b. screw dislocatio n
c. glidin g motion
d. none of the above
Q. The overall electrical neutralit is maintained in:
a. frenkel\ s defect
b. screw dislocatio n
c. low angle boundary defect
d. none of the above
Q. Critical resolved shear stress is a phenomenon related to
a. yielding
b. dislocatio n theory
c. slip
d. none of the above
Q. Strain hardening will take place if
a. obstacle are present
b. obstacle are absent
c. obstacle are moving
d. obstacle are weak
Q. The overall electrical nutrality is maintained in
a. frenkel\ s defect
b. screw dislocatio n
c. low angle boundary defect
d. none
Q. Volume imperfections can be
a. schottkey\ s defect
b. twin
c. stacking fault
d. non crystalline region
Q. The omperfections can be minimised by
a. thermal treatment
b. making metals infiber form
c. surface treatment
d. all of the above
Q. Presence of carbon atom in FCC iron at 1100 degrees is an exampl of
a. interstitial defect
b. substitutiona l
c. vacancy
d. none
Q. Miller indices are same for
a. perpendicul a r planes
b. orthogon al planes
c. face planes
d. parall el plane s
Q. A material having different properties at different directions is known as
a. isotropic
b. anisotropic
c. crystalline
d. metal
Q. The crystal structure of most of the common metals are
a. cubic
b. rhombohed r al
c. tertagonal
d. triclinic