McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Electrical Engineering .
| 451. |
A crystal structure in a regular array of atoms is arranged in one of the: |
| A. | 10 space lattices |
| B. | 7 space lattice s |
| C. | 14 space lattices |
| D. | none of the above |
| Answer» C. 14 space lattices | |
| 452. |
There are 2 atoms in a unit cell of: |
| A. | body centered cubic space lattice |
| B. | face centered cubic space lattice |
| C. | close packed hexagonal space lattice |
| D. | all of the above |
| Answer» A. body centered cubic space lattice | |
| 453. |
Which of the following elements has hexagonal close packed structure? |
| A. | aluminium |
| B. | molybdenum |
| C. | cadmium |
| D. | chromium |
| Answer» C. cadmium | |
| 454. |
Atomic packing factore is maximum for: |
| A. | prism |
| B. | simple cube |
| C. | fcc |
| D. | bcc |
| Answer» C. fcc | |
| 455. |
The crystal structure of brass is: |
| A. | bcc |
| B. | fcc |
| C. | hcp |
| D. | orthorhomb i c |
| Answer» B. fcc | |
| 456. |
The crystal structure of gamma iron is: |
| A. | cubic |
| B. | bcc |
| C. | fcc |
| D. | hcp |
| Answer» C. fcc | |
| 457. |
Cold work is done on metals: |
| A. | below thermal critical range |
| B. | above thermal critical range |
| C. | at temperatur e below zero degree centigrade |
| D. | after slightly warming up the metal in furnace |
| Answer» A. below thermal critical range | |
| 458. |
In crystal imperfections, the lattice sites from which atoms are missing are called: |
| A. | impurities |
| B. | vacancies |
| C. | dislocation |
| D. | interstitialic i es |
| Answer» B. vacancies | |
| 459. |
Which of the following metals does not have face centered cubic structure? |
| A. | copper |
| B. | silver |
| C. | tin |
| D. | lead |
| Answer» C. tin | |
| 460. |
The process which occures with heating in excess of that used recovery is called: |
| A. | grain growth |
| B. | recrystalliz at ion |
| C. | cold working |
| D. | hot working |
| Answer» B. recrystalliz at ion | |
| 461. |
Recrystallization temperature of aluminium is 150˚ C and that of copper is: |
| A. | 100˚ |
| B. | 200˚ |
| C. | 300˚ |
| D. | 400˚ |
| Answer» B. 200˚ | |
| 462. |
The linear disturbance of atomic arrangment is known as: |
| A. | imperfectio n s |
| B. | slip |
| C. | dislocations |
| D. | twinning |
| Answer» C. dislocations | |
| 463. |
Every point of a space lattice has ------ surrounding: |
| A. | atoms |
| B. | element |
| C. | lattice |
| D. | identical |
| Answer» D. identical | |
| 464. |
------- parameter means the dimensions of the unit cell in any of the crystallographic arrangements. |
| A. | identical |
| B. | nucleus |
| C. | element |
| D. | lattice |
| Answer» D. lattice | |
| 465. |
------- is defined as the number of nearest atoms which are directly surrounding a given atom. |
| A. | lattice |
| B. | bravais |
| C. | atomi c packin g factor |
| D. | co- ordinatio n number |
| Answer» D. co- ordinatio n number | |
| 466. |
The ratio of the volume of atoms per unit cell to the total volume occupied by the unit cell called------ --. |
| A. | co- ordinatio n number |
| B. | atomi c packin g factor |
| C. | unit cell |
| D. | miller indices |
| Answer» B. atomi c packin g factor | |
| 467. |
-------- is a system of notation of planes within a crystal of space lattice. |
| A. | space lattice |
| B. | crystalline |
| C. | miller indices |
| D. | identical |
| Answer» C. miller indices | |
| 468. |
The change in dimension of foems of matter under the action of applied forces is called---. |
| A. | elastic |
| B. | plastic |
| C. | deformation |
| D. | none of the above |
| Answer» C. deformation | |
| 469. |
------- deformation is the deformation which disappears when the load is removed. |
| A. | plastic |
| B. | elastic |
| C. | crystalline |
| D. | none of the above |
| Answer» B. elastic | |
| 470. |
In metals the plastic deformation generally takes place by the process of ---- ----. |
| A. | twinning |
| B. | slipping |
| C. | vacancy |
| D. | none of the above |
| Answer» B. slipping | |
| 471. |
In ----- the orientation of the crstal above and below the slip plane is same after deformation as before. |
| A. | twinning |
| B. | slip |
| C. | plastic |
| D. | none of the above |
| Answer» B. slip | |
| 472. |
------- defects are imperfect point like regions in a crystal. |
| A. | line |
| B. | point |
| C. | edge |
| D. | none of the above |
| Answer» B. point | |
| 473. |
A ------is the simplest point defect and involves a missing atom within a metal. |
| A. | point |
| B. | vacancy |
| C. | line |
| D. | none of the above |
| Answer» B. vacancy | |
| 474. |
------- imperfection involves vacancies of pair of ions of opposite charges. |
| A. | vacancy |
| B. | schottky |
| C. | edge |
| D. | none of the above |
| Answer» B. schottky | |
| 475. |
A linear disturbance of atomic arrangement which can move very easily on the slip plane through the crstal is known as -----. |
| A. | twinning |
| B. | slipping |
| C. | dislocation |
| D. | none of the above |
| Answer» C. dislocation | |
| 476. |
The Burger's vectore is at------- to the edge dislocation line. |
| A. | parallel |
| B. | perpendicul a r |
| C. | right angle |
| D. | none of the above |
| Answer» C. right angle | |
| 477. |
In ------dislocation only shear stress field exists. |
| A. | edge |
| B. | line |
| C. | screw |
| D. | none of the above |
| Answer» C. screw | |
| 478. |
------ slip is process where by a screw dislocation glides into another slip plane having a slip direction in common with the original slip plane. |
| A. | dislocations |
| B. | right angle |
| C. | cross |
| D. | none of the above |
| Answer» C. cross | |
| 479. |
-------- dislocation plays an important role in crystal growth. |
| A. | edge |
| B. | point |
| C. | screw |
| D. | none of the above |
| Answer» C. screw | |
| 480. |
Non-random alignment of crystals or molecules is known as ----- orientation. |
| A. | grain size |
| B. | atomic |
| C. | perferred |
| D. | none of the above |
| Answer» C. perferred | |
| 481. |
Chances of crack propagation is more in -- -----. |
| A. | cold working |
| B. | hot working |
| C. | annealing |
| D. | none of the above |
| Answer» A. cold working | |
| 482. |
The tiny block formed by the arrangement of small group of atom is called ----- --. |
| A. | unit cell |
| B. | space lattice |
| C. | lattice point |
| D. | none of the above |
| Answer» A. unit cell | |
| 483. |
According to Bravais there are ------ possible types of space lattice in the seven basic crystal system. |
| A. | 8 |
| B. | 14 |
| C. | 20 |
| D. | 24 |
| Answer» B. 14 | |
| 484. |
In metals the plastic deformation generally takes place by the process of ---- -----. |
| A. | twinning |
| B. | slipping |
| C. | atomic spacin g |
| D. | dislocations |
| Answer» B. slipping | |
| 485. |
The shear stress required to produce slip on a crystal plane is called the ------ shear stress. |
| A. | critical resolve d |
| B. | atomic |
| C. | cross |
| D. | none of the above |
| Answer» A. critical resolve d | |
| 486. |
--------- occure over wide planes. |
| A. | slip |
| B. | twinning |
| C. | point |
| D. | none of the above |
| Answer» A. slip | |
| 487. |
In -------- every atomic plane is involved. |
| A. | atomic spacin g |
| B. | slipping |
| C. | twinning |
| D. | none of the above |
| Answer» C. twinning | |
| 488. |
A linear disturbance of atomic arrangement, which can move very easily on the slip plane through the crystal is known as ------ --. |
| A. | twinning |
| B. | slipping |
| C. | dislocation |
| D. | none of the above |
| Answer» C. dislocation | |
| 489. |
The Burger's vectore is at------- to the edge dislocation line. |
| A. | parallel |
| B. | perpendicul a r |
| C. | right angles |
| D. | none of the above |
| Answer» C. right angles | |
| 490. |
In a screw dislocation Burger's vectore is - ------- to the linear defect but there is distoration of the plane. |
| A. | parallel |
| B. | point |
| C. | edges |
| D. | none of the above |
| Answer» A. parallel | |
| 491. |
In -------- dislocation only shear stress field exists. |
| A. | edge |
| B. | line |
| C. | screw |
| D. | none of the |
| Answer» C. screw | |
| 492. |
Cold working increasings: |
| A. | hardness |
| B. | ductility |
| C. | ultimat e tensile |
| D. | none of the above |
| Answer» C. ultimat e tensile | |
| 493. |
Alloying elements of impurities greatly increase the lattice imperfections which decrease/increase the conductivity. |
| A. | decrease |
| B. | increase |
| C. | less |
| D. | none of the above |
| Answer» A. decrease | |
| 494. |
Any mechanical process that increases the number of dislocations will result in decrease/increase in the electrical resistance of the metal. |
| A. | decreases |
| B. | increases |
| C. | more |
| D. | none of the above |
| Answer» B. increases | |
| 495. |
The capacit of material to undergo deformation under tension without rupture is known as: |
| A. | strength |
| B. | stiffness |
| C. | toughness |
| D. | ductility |
| Answer» D. ductility | |
| 496. |
The structure of common glass is: |
| A. | amorphous |
| B. | partially crystallin e |
| C. | fully crystallin e |
| D. | none of the above |
| Answer» A. amorphous | |
| 497. |
Which of the following materials has body centered cubic structure? |
| A. | molybdenum |
| B. | cadmium |
| C. | glass |
| D. | zinc |
| Answer» A. molybdenum | |
| 498. |
Which of the following materials does not have body centered cubic structure? |
| A. | vanadium |
| B. | potassium |
| C. | lithium |
| D. | calcium |
| Answer» D. calcium | |
| 499. |
Which of the following factores govern the grain size? |
| A. | nature and extent of deoxidizers |
| B. | chemical compositio n of steel |
| C. | alloying element s |
| D. | all of the above |
| Answer» D. all of the above | |
| 500. |
In -------- fracture the surface obtained in shining and accompanied with the formation of slip planes. |
| A. | brittle |
| B. | ductile |
| C. | inter granula r |
| D. | none of the above |
| Answer» B. ductile | |
Done Studing? Take A Test.
Great job completing your study session! Now it's time to put your knowledge to the test. Challenge yourself, see how much you've learned, and identify areas for improvement. Don’t worry, this is all part of the journey to mastery. Ready for the next step? Take a quiz to solidify what you've just studied.