Top 1000+ Solved Material Science MCQ Questions Answer
Q. FCC metals have higher ductility than BCC metals since _
a. fcc metals have higher
b. fcc metals have lower
c. fcc metals have lower
d. fcc metals have higher
Q. the phenomenon by virtue of which metals become harder and stronger without any heat treatment is called
a. strain hardening
b. work hardening
c. all of the above
d. none of the above
Q. after intial cold working, the stress required to further deform the material is
a. same
b. lower
c. higher
d. random
Q. work hardening is the phenomenon observed if metal is worked the recrystallization temperature
a. above
b. below
c. independent of
d. none of the above
Q. working of metal below crystallization temperature is known as
a. cold working
b. hot working
c. any one of above
d. none of the above
Q. working of metal above crystallization temperature is known as
a. cold working
b. hot working
c. any one of above
d. none of the above
Q. for a given metal its recrystallization temperature depends on
a. amonut of cold working
b. grain size
c. melting temperature s
d. all of the above
Q. finer is the grain size -
a. more is recrystalliza tion temperature
b. lesser is the recrystalliza tion temperature
c. recrystalliza tion temperature remains same
d. none of the above
Q. Frank-Reed source is associated with-
a. vacancy and interstitial defect
b. reductiion in dislocations
c. multiplicati on of dislocations
d. none of the above
Q. finer is the grain size -
a. more is dislocation density in cold working
b. lesser is dislocation density in cold working
c. dislocation density in cold working remains same
d. none of the above
Q. the mechanism of plastic deformation in polycrystalline material is than the mechanism in single crystal structure
a. simpler
b. complex
c. same
d. random
Q. the stress required to produce same deformation is higher in case of polycrystalline material as compared to polycrystalline materials
a. coarse garined, fine grained
b. fine grained, coarse grained
c. a or b
d. none of the above
Q. the and property of metals increase due to cold working
a. hardness, electrical conductivity
b. tensile strength, electrical conductivity
c. electrical resistance, internal stresses
d. corrosion resistance, ductility
Q. the and property of metals decrease due to cold working
a. hardness, electrical conductivity
b. tensile strength, electrical conductivity
c. electrical resistance, internal stresses
d. corrosion resistance, ductility
Q. the property of metals increases and property decreases due to cold working
a. hardness, electrical conductivity
b. ductility, electrical conductivity
c. electrical resistance, internal stresses
d. corrosion resistance, ductility