Top 1000+ Solved Material Science MCQ Questions Answer
Q. In crystal imperfections, the lattice sites from which atoms are missing are called:
a. impurities
b. vacancies
c. dislocation
d. interstitialic i es
Q. Which of the following metals does not have face centered cubic structure?
a. copper
b. silver
c. tin
d. lead
Q. The process which occures with heating in excess of that used recovery is called:
a. grain growth
b. recrystallizat ion
c. cold working
d. hot working
Q. The linear disturbance of atomic arrangment is known as:
a. imperfection s
b. slip
c. dislocations
d. twinning
Q. Every point of a space lattice has ------ surrounding:
a. atoms
b. element
c. lattice
d. identical
Q. ------- parameter means the dimensions of the unit cell in any of the crystallographic arrangements.
a. identical
b. nucleus
c. element
d. lattice
Q. ------- is defined as the number of nearest atoms which are directly surrounding a given atom.
a. lattice
b. bravais
c. atomi c packin g factor
d. co- ordinatio n number
Q. The ratio of the volume of atoms per unit cell to the total volume occupied by the unit cell called------ --.
a. co- ordinatio n number
b. atomi c packin g factor
c. unit cell
d. miller indices
Q. -------- is a system of notation of planes within a crystal of space lattice.
a. space lattice
b. crystalline
c. miller indices
d. identical
Q. The change in dimension of foems of matter under the action of applied forces is called---.
a. elastic
b. plastic
c. deformation
d. none of the above
Q. ------- deformation is the deformation which disappears when the load is removed.
a. plastic
b. elastic
c. crystalline
d. none of the above
Q. In metals the plastic deformation generally takes place by the process of --------.
a. twinning
b. slipping
c. vacancy
d. none of the above
Q. In ----- the orientation of the crstal above and below the slip plane is same after deformation as before.
a. twinning
b. slip
c. plastic
d. none of the above
Q. ------- defects are imperfect point like regions in a crystal.
a. line
b. point
c. edge
d. none of the above
Q. A ------is the simplest point defect and involves a missing atom within a metal.
a. point
b. vacancy
c. line
d. none of the above