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This set of Material Science Multiple Choice Questions & Answers (MCQs) focuses on Material Science Set 11
Q1 | Cold working process is carried out on……….. Recrystallisation temp.
- equal
- above
- below
- none of the above
Q2 | Coordination number for closest packed crystal structure
- 16
- 12
- 8
- 4
Q3 | Coordination number in simple cubic crystal structure
- 8
- 6
- 12
- 4
Q4 | Coordination Number of Body-Centered Cubic structure is…..
- 6
- 8
- 10
- 12
Q5 | Ligancy of FCC structure are…..
- 6
- 8
- 10
- 12
Q6 | HCP structure have ligancy …..
- 6
- 8
- 10
- 12
Q7 | Crystal structure is arrangement ofin different patterns
- electrons
- protons
- atoms
- crystals
Q8 | Crystallographic planes are represented by 3 numbers enclosed in
- {} bracket
- [ ] square bracket
- ( ) raound bracket
- none of the above
Q9 | crystallography is study of
- pattern formation of electrons
- patterns formation of protons
- different pattern formation of atoms
- none of the above
Q10 | Cu diffuses in FCC Ni, this is type ofimpurity
- substitution al
- interstitial
- both a & b
- none of the above
Q11 | Decrease in free energy during recovery is attributed to
- excess point defects
- excess dislocations
- grain boundaries
- all
Q12 | Decrease in free energy during recrystallization is attributed to
- excess point defects
- excess dislocations
- grain boundaries
- all
Q13 | Deformation of steel at room temperature is
- hot working
- cold working
- both a and b
- can’t say
Q14 | Density of material depends on …..
- no.of atoms/unit cell
- atomic packing factor
- coordinatio n number
- both a&b
Q15 | Dimensional accuracy is better in
- hot working
- cold working
- both a and b
- can’t say
Q16 | Dislocations have types
- 2
- 1
- 3
- 5
Q17 | Example for strengthening mechanism in single-phase material
- strain hardening
- precipitatio n hardening
- fiber strengthenin g
- dispersion strengthenin g
Q18 | FCC crystal having crystal systems.
- 12
- 10
- 6
- 24
Q19 | FCC have Average no. of atoms per unit cell
- 6
- 2
- 4
- 8
Q20 | FCC have ligancy number
- 6
- 12
- 4
- 8
Q21 | FCC having atomic packing factor
- 0.68
- 0.52
- 0.74
- 0.72
Q22 | FCC having stacking
- abcabca bc
- aaaaaaa
- abababa b
- abcabab c
Q23 | FCC materials are good in ….
- brittle
- malleable
- ductile
- hard
Q24 | Figure out the odd one in the following
- frenkel defect
- tilt boundary
- twist boundary
- stacking fault
Q25 | Fine grain size, usually, can not be obtained during the following process
- slow cooling
- increasing nucleation rate
- retarding grain growth
- fast cooling