On This Page
This set of Material Science Multiple Choice Questions & Answers (MCQs) focuses on Material Science Set 7
Q1 | when the metal is stresses above its elastic limit, the resulting deformation is
- permenant
- temporary
- partially permenant
- a or c
Q2 | stress required during plastic deformation is than that required during elastic deformation
- equal
- high
- low
- b or c
Q3 | different shapes can be permentaly given to metals by virtue of property
- elastic
- plastic
- none of the above
- both a and b
Q4 | mechannnial properties of the metalafter plastic deformation
- increases
- either increase or decrease
- remains constant
- none of the above
Q5 | the plastic deformation can takes place through
- slip
- twinning
- combination of slip and twinning
- all of the above
Q6 | slip is defined as displacement of one part of crystal relative to other
- tensile
- compressive
- shear
- bending
Q7 | slip takes place due to
- stress applied on material
- chemical reaction within material
- atmospheric reaction
- none of the above
Q8 | slip occurs along plane and indirection
- random, specific
- specific, random
- random, random
- specific, specific
Q9 | the plane on which slip takes place is called plane
- defective
- imperfect
- slip
- twin
Q10 | in slip, the crystal structure above and below the plane remains
- distorted
- undistorted
- sometimes distorted
- none of the above
Q11 | slip occurs on plae which has
- least number of atoms
- random number of atoms
- maximum number of atoms
- no atoms
Q12 | slip direction is direction in the slip plane which has
- least number of atoms
- random number of atoms
- maximum number of atoms
- no atoms
Q13 | twin takes place due to
- stress applied on material
- chemical reaction within material
- atmospheric reaction
- none of the above
Q14 | in twinning, the structure in the distorted region forms of the crystal structure in the distorted region
- random orientation
- mirror image
- a or b
- none of the above
Q15 | the planes along which mirror image is formed is called planes
- defective
- imperfect
- slip
- twin
Q16 | the plastic deformation takes place due toand
- slip
- twin
- both of the above
- none of the above
Q17 | twining is the phenomenon observed due to
- mechanical treatment
- thermal treatment
- chemical treatment
- a or b
Q18 | metals are more ductile than metals
- bcc,fcc
- fcc,bcc
- hcp,bcc
- bcc,hcp
Q19 | generally metals with crystal structure are more ductile
- bcc
- fcc
- hcp
- a and c
Q20 | generally metals with crystal structure shows plastic deformation mainly by slip mechanism
- bcc
- fcc
- hcp
- a and c
Q21 | generally metals with crystal structure shows plastic deformation mainly by twinning mechanism
- bcc
- fcc
- hcp
- a and c
Q22 | twinning occurs along plane and direction
- random, specific
- specific, random
- random, random
- specific, specific
Q23 | requires more stress to be initiated with respect to
- slip, twinning
- twinning, slip
- grain boundary defect, slip
- none of the above
Q24 | as compared to slip the stress required to propogate twin is
- more
- lesser
- constant
- varies randomly
Q25 | the appears as a pair of thick lines in the microscopic structure even after polishing
- slip
- twinning
- combination of slip and twinning
- all of the above