Material Science Set 10

Electrical Engineering

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This set of Material Science Multiple Choice Questions & Answers (MCQs) focuses on Material Science Set 10

Q1 |                this is type of slip systems.
  • glide
  • slip
  • twinns
  • none of the above
Answer: glide
Q2 |                  it is type of stacking faults
  • twinns
  • glide
  • climb
  • intrisic
Answer: intrisic
Q3 |                      get for burger vector
  • quality
  • plane
  • direction
  • atoms
Answer: direction
Q4 |                        is defined as fraction of volume occupied by atoms in unit cell
  • ligancy number
  • avg. no. of atoms/ unit cell
  • atomic packing number
  • none of the above
Answer: atomic packing number
Q5 | A crystalline material must have
  • repetitive arrangement of atoms in any one direction
  • repetitive arrangement of atoms in any two direction
  • repetitive arrangement of atoms in all three direction
  • none of the above
Answer: repetitive arrangement of atoms in all three direction
Q6 | A family of directions is represented by
  • (hkl)
  • {hkl}
  • [uvw]
Answer:
Q7 | A hexagonal crystal system consists of
  • a=b=c
  • a=b but not equal to c
  • β= α = 90 °, γ = 120°
  • both b & c
Answer: both b & c
Q8 | A higher value of atomic packing factor number indicates                   
  • bigger size of material
  • higher density of material
  • higher value of avg. no. of atoms per unit cell
  • both b & c
Answer: both b & c
Q9 | A higher value of co-ordination number indicates               
  • bigger size of material
  • higher density of material
  • lower density of material
  • none of the above
Answer: higher density of material
Q10 | A material having repetitive arrangement of atoms over larger atomic distances is called                     
  • crystalline material
  • non- crystalline material
  • solid material
  • liquid material
Answer: crystalline material
Q11 | A non-crystalline material is characterized as having _
  • repetitive arrangement of atoms in all three direction
  • repetitive arrangement of atoms in any one direction
  • non- repetitative or random arrangement of atoms in all three directions
  • none of the above
Answer: repetitive arrangement of atoms in any one direction
Q12 | A single cubic crystal system consists of
  • a=b=c
  • a=b but not equal to c
  • β= α = γ = 90°
  • both a & c
Answer: both a & c
Q13 | A unit cell represents of a crystal structure
  • weight
  • size
  • geometry
  • none of the above
Answer: geometry
Q14 | APF (Atomic Packing Factor) of Body- Centered Cubic structure is…..
  • 0.74
  • 0.52
  • 0.68
  • 0.8
Answer: 0.68
Q15 | FCC structure have APF (Atomic Packing Factor) of …..
  • 0.74
  • 0.52
  • 0.68
  • 0.8
Answer: 0.74
Q16 | HCP structure have APF (Atomic Packing Factor) of …..
  • 0.74
  • 0.52
  • 0.68
  • 0.8
Answer: 0.74
Q17 | Atomic packing factor is
  • distance between two adjacent atoms
  • projected area fraction of atoms on a plane
  • volume fraction of atoms in cell
  • none
Answer: volume fraction of atoms in cell
Q18 | Average frequency of atomic vibrations in a solid (in Hz)
  • 10-12
  • 10-13
  • 10+12
  • 10+13
Answer: 10+13
Q19 | BCC have Average no. of atoms per unit cell
  • 6
  • 2
  • 4
  • 8
Answer: 2
Q20 | BCC have ligancy number
  • 6
  • 12
  • 4
  • 8
Answer: 8
Q21 | BCC having stacking
  • abcabca bc
  • aaaaaaa
  • abababa b
  • abcabab c
Answer: abababa b
Q22 | Beneficial property of foreign particles
  • reduces density
  • act as stress raisers
  • obstructs dislocation motion
  • none
Answer: obstructs dislocation motion
Q23 | Burger vector gives of the shift
  • amount
  • quality
  • plane
  • atoms
Answer: amount
Q24 |   Burger vector to dislocation line isfor edge dislocations
  • perpendicul ar
  • parallel
  • inclined
  • first perpendicul ar then parallel
Answer: parallel
Q25 | Carbon diffuses in Fe, this is type ofimpurity
  • substitution al
  • interstitial
  • both a & b
  • none of the above
Answer: interstitial
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