Material Science Multiple Choice Questions (MCQ)
1- Body-centered cubic crystal lattice is found in
(A) iron
(B) aluminum
(C) gold
(D) zinc
2- Which one of the following is no-destructive testing method of engineering materials?
(A) tensile testing
(B) impact testing
(C) fatigue testing
(D) ultrasonic testing
3- Which material is used for manufacturing of resistance wire for electrical appliances?
(A) nichrome
(B) gun metal
(C) babbit metal
(D) brass
4- Dislocation in materials is a _______ defect.
(A) Point
(B) Line
(C) Plane
(D) Casting defect
5- Following stress relieving process is used after cold working of materials
(A) Tempering
(B) Cyaniding
(C) Annealing
(D) Hardening
6- A measure of Rockwell hardness is the
(A) depth of penetration of indenter
(B) surface area of indentation
(C) projected area of indentation
(D) height of rebound
7- Brinell hardness test uses an indenter that is a
(A) sphero-conical diamond
(B) sphere made of steel or tungsten carbide
(C) square-base pyramid diamond
(D) rectangular-base pyramid diamond
8- Pig iron is
(A) pure iron with no carbon
(B) iron with 0.40 % carbon
(C) iron with 4 % carbon
(D) iron with 2.40 % carbon
9- In a face-centered cubic (FCC) cell, atoms are present
(A) at all eight corners of the cube and at the centre of each face
(B) at all eight corners of the cube and at the body centre
(C) at all eight corners of the cube, at the centre of each face and at the body centre
(D) none of the above
10- Fine grain size during the solidification of a metal is achieved by
(A) lower nucleation rate
(B) higher nucleation rate with lower growth rate
(C) higher nucleation rate with higher growth rate
(D) lower growth rate
ANSWERS:
1-(A), 2-(D), 3-(A), 4-(B), 5-(C), 6-(A), 7-(B), 8-(C), 9-(A), 10-(B)