Top 1000+ Solved Material Science MCQ Questions Answer
Q. Chances of crack propagation is more in -------.
a. cold working
b. hot working
c. annealing
d. none of the above
Q. The tiny block formed by the arrangement of small group of atom is called ----- --.
a. unit cell
b. space lattice
c. lattice point
d. none of the above
Q. In metals the plastic deformation generally takes place by the process of ---------.
a. twinning
b. slipping
c. atomic spacin g
d. dislocations
Q. The shear stress required to produce slip on a crystal plane is called the ------ shear stress.
a. critical resolve d
b. atomic
c. cross
d. none of the above
Q. In -------- every atomic plane is involved.
a. atomic spacin g
b. slipping
c. twinning
d. none of the above
Q. A linear disturbance of atomic arrangement, which can move very easily on the slip plane through the crystal is known as ------ --.
a. twinning
b. slipping
c. dislocation
d. none of the above
Q. The Burger's vectore is at------- to the edge dislocation line.
a. parallel
b. perpendicul a r
c. right angles
d. none of the above
Q. In a screw dislocation Burger's vectore is -------- to the linear defect but there is distoration of the plane.
a. parallel
b. point
c. edges
d. none of the above
Q. Alloying elements of impurities greatly increase the lattice imperfections which decrease/increase the conductivity.
a. decrease
b. increase
c. less
d. none of the above
Q. Any mechanical process that increases the number of dislocations will result in decrease/increase in the electrical resistance of the metal.
a. decreases
b. increases
c. more
d. none of the above
Q. The capacit of material to undergo deformation under tension without rupture is known as:
a. strength
b. stiffness
c. toughness
d. ductility