McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Electrical Engineering .
| 501. |
Mechanical stressing of crystal structure -- ------ conductivity of metal. |
| A. | decreases |
| B. | increases |
| C. | less |
| D. | none of the above |
| Answer» A. decreases | |
| 502. |
-------- crystallises in the diamond cubic lattice. |
| A. | pyramid |
| B. | glass |
| C. | diamond |
| D. | none of the above |
| Answer» C. diamond | |
| 503. |
--------- deformation is the deformation which disappears when the load is removed. |
| A. | plastic |
| B. | elastic |
| C. | permanent |
| D. | none of the above |
| Answer» A. plastic | |
| 504. |
Atom movements in twinning are much less than ----- --. |
| A. | atomic spacin g |
| B. | lattice |
| C. | point |
| D. | none of the above |
| Answer» A. atomic spacin g | |
| 505. |
The displacement distance for atoms around the dislocation is the---- --. |
| A. | burger vector |
| B. | twinning |
| C. | slipping |
| D. | none of the above |
| Answer» A. burger vector | |
| 506. |
Grain growth is an increase in ----- --. |
| A. | grain shape |
| B. | grain size |
| C. | grain distributio n |
| D. | none of the above |
| Answer» B. grain size | |
| 507. |
Slow and progressive deformation of material with timer under constant stress is called----. |
| A. | creep |
| B. | erosion |
| C. | resilience |
| D. | none of the above |
| Answer» A. creep | |
| 508. |
------ are elastic members which distort under load and regain their original shape when load is removed. |
| A. | rubber |
| B. | springs |
| C. | ductility |
| D. | none of the above |
| Answer» B. springs | |
| 509. |
An unit cell is ------- |
| A. | the smallest group of the atoms which when regularly repeated forms the crystal. |
| B. | the basic building block of crystal. |
| C. | a cube containin g the largest number of atoms |
| D. | an agglomerat e d structure |
| Answer» A. the smallest group of the atoms which when regularly repeated forms the crystal. | |
| 510. |
A material having different properties in different directions is known as: |
| A. | isotropic |
| B. | anisotropic |
| C. | crystalline |
| D. | metal |
| Answer» B. anisotropic | |
| 511. |
Miller indices are the same for: |
| A. | perpendicul a r planes |
| B. | orthogon al planes |
| C. | face plane |
| D. | parall el plane s |
| Answer» D. parall el plane s | |
| 512. |
On application of thermal energy, a dislocation vanishes: |
| A. | at the crystal surface |
| B. | at the nodal point |
| C. | as a loop |
| D. | both a and b |
| Answer» D. both a and b | |
| 513. |
Volume imperfections can be: |
| A. | schottky\ s defect |
| B. | twin |
| C. | stacking fault |
| D. | noncrystalli n e regions |
| Answer» D. noncrystalli n e regions | |
| 514. |
The cross-slip occures in: |
| A. | climb up motion |
| B. | screw dislocatio n |
| C. | glidin g motion |
| D. | none of the above |
| Answer» B. screw dislocatio n | |
| 515. |
The overall electrical neutralit is maintained in: |
| A. | frenkel\ s defect |
| B. | screw dislocatio n |
| C. | low angle boundary defect |
| D. | none of the above |
| Answer» A. frenkel\ s defect | |
| 516. |
Critical resolved shear stress is a phenomenon related to |
| A. | yielding |
| B. | dislocatio n theory |
| C. | slip |
| D. | none of the above |
| Answer» C. slip | |
| 517. |
Strain hardening will take place if |
| A. | obstacle are present |
| B. | obstacle are absent |
| C. | obstacle are moving |
| D. | obstacle are weak |
| Answer» A. obstacle are present | |
| 518. |
The overall electrical nutrality is maintained in |
| A. | frenkel\ s defect |
| B. | screw dislocatio n |
| C. | low angle boundary defect |
| D. | none |
| Answer» A. frenkel\ s defect | |
| 519. |
Volume imperfections can be |
| A. | schottkey\ s defect |
| B. | twin |
| C. | stacking fault |
| D. | non crystalline region |
| Answer» D. non crystalline region | |
| 520. |
The omperfections can be minimised by |
| A. | thermal treatment |
| B. | making metals in fiber form |
| C. | surface treatment |
| D. | all of the above |
| Answer» D. all of the above | |
| 521. |
Presence of carbon atom in FCC iron at 1100 degrees is an exampl of |
| A. | interstitial defect |
| B. | substitution a l |
| C. | vacancy |
| D. | none |
| Answer» A. interstitial defect | |
| 522. |
Miller indices are same for |
| A. | perpendicul a r planes |
| B. | orthogon al planes |
| C. | face planes |
| D. | parall el plane s |
| Answer» D. parall el plane s | |
| 523. |
A metal which posseses BCC is |
| A. | va |
| B. | sn |
| C. | al |
| D. | ni |
| Answer» B. sn | |
| 524. |
A material having different properties at different directions is known as |
| A. | isotropic |
| B. | anisotropic |
| C. | crystalline |
| D. | metal |
| Answer» B. anisotropic | |
| 525. |
The crystal structure of most of the common metals are |
| A. | cubic |
| B. | rhombohed r al |
| C. | tertagonal |
| D. | triclinic |
| Answer» A. cubic | |
| 526. |
In the simple cubic structure,are direction [100] and plane (100) parellel ? |
| A. | no |
| B. | yes |
| C. | may be |
| D. | none |
| Answer» A. no | |
| 527. |
Structure of thorium is |
| A. | bcc |
| B. | fcc |
| C. | hcp |
| D. | none |
| Answer» B. fcc | |
| 528. |
The capacity of a metal to exhibit cosiderable elastic recovery upon release is known as |
| A. | toughness |
| B. | hardness |
| C. | stiffness |
| D. | resilience |
| Answer» D. resilience | |
| 529. |
The property of the material which enables the formation of permanent deformation without fracture is known as |
| A. | elasticity |
| B. | plasticity |
| C. | ductility |
| D. | resistivity |
| Answer» B. plasticity | |
| 530. |
......... working as always accompanied by strain hardening |
| A. | hot |
| B. | cold |
| C. | annealing |
| D. | none |
| Answer» B. cold | |
| 531. |
Mechanical streesing of crystal strucure .........conductivity of metals. |
| A. | decreases |
| B. | increases |
| C. | less |
| D. | none |
| Answer» A. decreases | |
| 532. |
The grain boundry area decreases when the polycrystalline material heated .. |
| A. | below 0.5 tm |
| B. | below 0 k |
| C. | above room temperatur e |
| D. | above 0.5 tm |
| Answer» D. above 0.5 tm | |
| 533. |
The critically resolved shear stress Tcr=(P cos α cos β)/A . the equation known as .....law. |
| A. | bragg\s |
| B. | schmid\s |
| C. | bauchinger\ s |
| D. | none |
| Answer» B. schmid\s | |
| 534. |
The shear stress required to produce slip on crystal plane is called........ shear plane. |
| A. | critical resolve d |
| B. | atomic |
| C. | cross |
| D. | none |
| Answer» A. critical resolve d | |
| 535. |
.......occures over wide planes |
| A. | slip |
| B. | twinning |
| C. | point |
| D. | none |
| Answer» A. slip | |
| 536. |
In ........every atomic plane is envolved |
| A. | atomic spacin g |
| B. | slipping |
| C. | twinning |
| D. | none |
| Answer» C. twinning | |
| 537. |
In metals the plastic deformation is generally takes place by |
| A. | twinning |
| B. | slip |
| C. | atomic spacin g |
| D. | dislocations |
| Answer» B. slip | |
| 538. |
According to bravais ,there are ......... possible types of space lattice in the seven |
| A. | 8 |
| B. | 14 |
| C. | 20 |
| D. | 24 |
| Answer» B. 14 | |
| 539. |
The burger vector is at ..... to the edge dislocation line |
| A. | parallel |
| B. | perpendicul a r |
| C. | right angle |
| D. | none |
| Answer» B. perpendicul a r | |
| 540. |
In .............disloction only shear stress field exists. |
| A. | edge |
| B. | line |
| C. | screw |
| D. | none |
| Answer» C. screw | |
| 541. |
.................. imperfections involves vacancies of pair of ions of opposite charges |
| A. | vacancy |
| B. | schottky |
| C. | edge |
| D. | none |
| Answer» B. schottky | |
| 542. |
Every point of a space lattice has ....... surrounding. |
| A. | atoms |
| B. | element |
| C. | lattice |
| D. | identical |
| Answer» D. identical | |
| 543. |
It is possible to continuously work on the metal during ....... working |
| A. | hot |
| B. | cold |
| C. | both |
| D. | none |
| Answer» A. hot | |
| 544. |
The process of formation of new grains is called...... |
| A. | recovery |
| B. | nucleation |
| C. | grain growth |
| D. | none |
| Answer» B. nucleation | |
| 545. |
The stress required to produce same deformation is higher in case of......... polycrystalline material as compared to ..... ...polycrystalline materials. |
| A. | coarse grained,fin e grained |
| B. | fine grained,co ar se grained |
| C. | both a and b |
| D. | none |
| Answer» B. fine grained,co ar se grained | |
| 546. |
mechanical testing gives information about |
| A. | chemical composition of metal |
| B. | failure analysis |
| C. | mechanical properties of metal |
| D. | behaviour of metal |
| Answer» C. mechanical properties of metal | |
| 547. |
when material is tested to evaluate properties, it is called as |
| A. | destructive testing |
| B. | non- destructive testing |
| C. | thermal testing |
| D. | chemical testing |
| Answer» A. destructive testing | |
| 548. |
during the product design and its manufacturing process, material undergoes test |
| A. | non- destructive testing |
| B. | destructive testing |
| C. | process inspection |
| D. | all of the above |
| Answer» D. all of the above | |
| 549. |
engineering materials are tested for the purpose of |
| A. | to find mechanical properties |
| B. | to find chemical composition |
| C. | to select appropriate material for perticular application |
| D. | all of the above |
| Answer» D. all of the above | |
| 550. |
tensile test gives values of material properties under the action of forces |
| A. | compressive |
| B. | tensile |
| C. | shear |
| D. | bending |
| Answer» B. tensile | |
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