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This set of Material Science Multiple Choice Questions & Answers (MCQs) focuses on Material Science Set 22
Q1 | In the simple cubic structure,are direction [100] and plane (100) parellel ?
- no
- yes
- may be
- none
Q2 | Structure of thorium is
- bcc
- fcc
- hcp
- none
Q3 | The capacity of a metal to exhibit cosiderable elastic recovery upon release is known as
- toughness
- hardness
- stiffness
- resilience
Q4 | The property of the material which enables the formation of permanent deformation without fracture is known as
- elasticity
- plasticity
- ductility
- resistivity
Q5 | ......... working as always accompanied by strain hardening
- hot
- cold
- annealing
- none
Q6 | Mechanical streesing of crystal strucure .........conductivity of metals.
- decreases
- increases
- less
- none
Q7 | The grain boundry area decreases when the polycrystalline material heated ..
- below 0.5 tm
- below 0 k
- above room temperatur e
- above0.5tm
Q8 | The critically resolved shear stress Tcr=(P cos α cos β)/A . the equation known as.....law.
- bragg\s
- schmid\s
- bauchinger\ s
- none
Q9 | The shear stress required to produce slip on crystal plane is called........ shear plane.
- critical resolve d
- atomic
- cross
- none
Q10 | .......occures over wide planes
- slip
- twinning
- point
- none
Q11 | In ........every atomic plane is envolved
- atomic spacin g
- slipping
- twinning
- none
Q12 | In metals the plastic deformation is generally takes place by
- twinning
- slip
- atomic spacin g
- dislocations
Q13 | According to bravais ,there are ......... possible types of space lattice in the seven
- 8
- 14
- 20
- 24
Q14 | The burger vector is at ..... to the edge dislocation line
- parallel
- perpendicula r
- right angle
- none
Q15 | In .............disloction only shear stress field exists.
- edge
- line
- screw
- none
Q16 | .................. imperfections involves vacancies of pair of ions of opposite charges
- vacancy
- schottky
- edge
- none
Q17 | Every point of a space lattice has ....... surrounding.
- atoms
- element
- lattice
- identical
Q18 | It is possible to continuously work on the metal during ....... working
- hot
- cold
- both
- none
Q19 | The process of formation of new grains is called......
- recovery
- nucleation
- grain growth
- none
Q20 | The stress required to produce same deformation is higher in case of......... polycrystalline material as compared to..... ...polycrystalline materials.
- coarse grained,fin e grained
- fine grained,co ar se grained
- both a and b
- none
Q21 | mechanical testing gives information about
- chemical composition of metal
- failure analysis
- mechanical properties of metal
- behaviour ofmetal
Q22 | when material is tested to evaluate properties, it is called as
- destructivetesting
- non- destructive testing
- thermal testing
- chemical testing
Q23 | during the product design and its manufacturing process, material undergoes test
- non- destructive testing
- destructivetesting
- process inspection
- all of the above
Q24 | engineering materials are tested for the purpose of
- to find mechanical properties
- to find chemical composition
- to select appropriate material for perticular application
- all of the above
Q25 | tensile test gives values of material properties under the action of forces
- compressive
- tensile
- shear
- bending