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This set of Material Science Multiple Choice Questions & Answers (MCQs) focuses on Material Science Set 13
Q1 | In FCC, the lattice parameter (a) is
- (4/√3) r
- 4/√3 r
- (4/√2) r
- 4/√2 r
Q2 | In geometrical hardening, at the beginning λ is
- less than 45°
- more than 35°
- more than 45°
- less than 35°
Q3 | In geometrical softening, at the beginning λ is
- less than 45°
- more than 35°
- more than 45°
- less than 35°
Q4 | In hot working force required isthan cold working
- greater
- less
- equal
- can’t say
Q5 | In hot working microstructure is
- distorted
- equiaxed
- refined
- both b & c
Q6 | In vacancy point defects, stress field produced in the vicinity.
- tension
- shear
- compression
- all
Q7 | Indexing or designation in a unit cell can be done for a particular
- point location
- direction
- plane
- all of the above
Q8 | Inter atomic distance is more the dislocation line in negative edge dislocation
- above
- below
- right side of
- left side of
Q9 | Inter atomic distance is more the dislocation line in positive edge dislocation
- above
- below
- right side of
- left side of
Q10 | It is a type of Twin
- annealing
- tempering
- normalising
- hardening
Q11 | Lattice constant represents
- distance between adjacent atoms of unit cell
- distance between adjacent unit cell
- angle between edges of unit cell
- geometry of crystal structure
Q12 | Lattice structure represents arrangement of unit cells in
- 2-dimensional axes system
- 3-dimensional axes system
- orthographi c system
- none of the above
Q13 | Ligancy number for HCP is
- 6
- 12
- 4
- 8
Q14 | Material having cohesive strength shows large plastic deformation
- high
- low
- constant
- none of the above
Q15 | Material having CRSS shows large plastic deformation
- high
- low
- constant
- none of the above
Q16 | Miller indices of the line of intersection of(⎯ 1⎯ 11) and (110) are
- [110]
- [101]
- [10-1]
- [-110]
Q17 | Minimum number of slip systems that must be operative during plastic deformation
- 3
- 4
- 5
- 6
Q18 | Most polymers are type of materials
- non- crystalline
- crystalline
- both a & b
- none of the above
Q19 | Negative screw dislocation is represented by
- ┴
- 0
- ┬
Q20 | No. of atoms in Body-Centered Cubic structure are …..
- 1
- 2
- 4
- 6
Q21 | No. of atoms in hexagon close packed structure are …..
- 1
- 2
- 4
- 6
Q22 | No.of atoms in FCCstructure are …..
- 2
- 1
- 4
- 5
Q23 | Oxidation of metals occurs during cold working.
- true
- false
Q24 | Plastic deformation results from the following.
- edge dislocation
- screw dislocations
- mixed dislocations
- all of the above
Q25 | Poor surface finish in………process
- cold working
- hot working
- casting
- welding