Material Science Set 18

Electrical Engineering

Practice Mode Previous Next
On This Page

This set of Material Science Multiple Choice Questions & Answers (MCQs) focuses on Material Science Set 18

Q1 | -------- dislocation plays an important role in crystal growth.
  • edge
  • screw
  • vacancies
  • schotty
Answer: screw
Q2 | Work hardening reduces:
  • malleability
  • hardness
  • toughness
  • ductility
Answer: ductility
Q3 | -------- is the low temperature phenomenon which results in the rstoration of the physical properties without any observable change in microstructure.
  • grain size
  • recovery
  • grain growth
  • recrystallizat ion
Answer: recovery
Q4 | Grain growth is an increase in ----- --.
  • grain size
  • hardness
  • malleability
  • brittleness
Answer: grain size
Q5 | A metal is said to be--------- worked, if it is mechanically processed below the crystallization temperature of the metal.
  • hot
  • cold
  • rolled
  • bend
Answer: cold
Q6 | Chances of cracks propogation is more in:
  • hot working
  • cold working
  • welding
  • mechining
Answer: cold working
Q7 | In ------working refinement of crystal occures.
  • cold
  • hot
  • annealing
  • none of above
Answer: hot
Q8 | -------- working is always accompanied by strain hardening.
  • hot
  • cold
  • rolled
  • all these of above
Answer: cold
Q9 | -------- working increases ultimate tensile strength.
  • cold
  • hot
  • annealing
  • none of the above
Answer: cold
Q10 | Annealing is done:
  • to harden the surface
  • surface smoothnes s
  • relievin g stresse s
  • improving micro structure for good surface finish
Answer: relievin g stresse s
Q11 | Among the crystal structure, which has the highest packing fraction.
  • bcc
  • fcc
  • diamon d cube
  • hcp
Answer: fcc
Q12 | The miller indices are the same for:
  • parall el plane s
  • perpendicul a r planes
  • orthogon al planes
  • crystallogra p hic planes
Answer: parall el plane s
Q13 | The crystal structure of silver is:
  • fcc
  • bcc
  • hcp
  • none of the above
Answer: fcc
Q14 | 0.68 is the atomic packing factore of:
  • bcc
  • fcc
  • simple cube
  • hcp
Answer: bcc
Q15 | (001) is a plane of the cube and is:
  • horizontal
  • vertical
  • inclinedto vp
  • inclinedto hp
Answer: horizontal
Q16 | The crystal structure of all the following material is HCP except:
  • graphite
  • zinc
  • magnesium
  • aluminium
Answer: aluminium
Q17 | The crystal structure of graphite is:
  • hcp
  • fcc
  • bcc
  • none of the above
Answer: hcp
Q18 | The crystal structure of Germanium is:
  • hcp
  • bcc
  • fcc
  • diamon d cube
Answer: diamon d cube
Q19 | How many atoms are there per unit cell in a body centered cubic lattice system?
  • 2
  • 3
  • 4
  • 6
Answer: 2
Q20 | How many molecules per unit cell are there in a face centered cubic lattice?
  • 2
  • 4
  • 6
  • 8
Answer: 4
Q21 | The crystal structure of most common metal is:
  • hexagonal
  • cubic
  • orthorhomb i c
  • any of the above
Answer: cubic
Q22 | The metal which has got BCC structure is:
  • silver
  • tungsten
  • zinc
  • aluminiu m watch
Answer: tungsten
Q23 | The structure of SiO2 quartz is:
  • hcp
  • bcc
  • fcc
  • orthorhomb i c
Answer: hcp
Q24 | The metal which has HCP structure is:
  • silver
  • iron
  • magnesium
  • aluminium
Answer: magnesium
Q25 | The crystal structure of the following materials is FCC except:
  • aluminium
  • magnesium
  • nickel
  • copper
Answer: magnesium
Previous Next