MCQOPTIONS
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MCQOPTIONS
This section includes 1232 Mcqs, each offering curated multiple-choice questions to sharpen your Electrical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1001. |
FCC structure have APF (Atomic Packing Factor) of ….. |
| A. | 0.74 |
| B. | 0.52 |
| C. | 0.68 |
| D. | 0.8 |
| Answer» B. 0.52 | |
| 1002. |
A unit cell represents of a crystal structure |
| A. | weight |
| B. | size |
| C. | geometry |
| D. | none of the above |
| Answer» D. none of the above | |
| 1003. |
A single cubic crystal system consists of |
| A. | a=b=c |
| B. | a=b but not equal to c |
| C. | β= α = γ = 90° |
| D. | both a & c |
| Answer» E. | |
| 1004. |
APF (Atomic Packing Factor) of Body- Centered Cubic structure is….. |
| A. | 0.74 |
| B. | 0.52 |
| C. | 0.68 |
| D. | 0.8 |
| Answer» D. 0.8 | |
| 1005. |
A non-crystalline material is characterized as having _ |
| A. | repetitive arrangement of atoms in all three direction |
| B. | repetitive arrangement of atoms in any one direction |
| C. | non- repetitative or random arrangement of atoms in all three directions |
| D. | none of the above |
| Answer» C. non- repetitative or random arrangement of atoms in all three directions | |
| 1006. |
A material having repetitive arrangement of atoms over larger atomic distances is called |
| A. | crystalline material |
| B. | non- crystalline material |
| C. | solid material |
| D. | liquid material |
| Answer» B. non- crystalline material | |
| 1007. |
A higher value of co-ordination number indicates |
| A. | bigger size of material |
| B. | higher density of material |
| C. | lower density of material |
| D. | none of the above |
| Answer» C. lower density of material | |
| 1008. |
A higher value of atomic packing factor number indicates |
| A. | bigger size of material |
| B. | higher density of material |
| C. | higher value of avg. no. of atoms per unit cell |
| D. | both b & c |
| Answer» E. | |
| 1009. |
A hexagonal crystal system consists of |
| A. | a=b=c |
| B. | a=b but not equal to c |
| C. | β= α = 90 °, γ = 120° |
| D. | both b & c |
| Answer» E. | |
| 1010. |
A family of directions is represented by |
| A. | (hkl) |
| B. | <uvw> |
| C. | {hkl} |
| D. | [uvw] |
| Answer» C. {hkl} | |
| 1011. |
                       is defined as fraction of volume occupied by atoms in unit cell |
| A. | ligancy number |
| B. | avg. no. of atoms/ unit cell |
| C. | atomic packing number |
| D. | none of the above |
| Answer» D. none of the above | |
| 1012. |
                     get for burger vector |
| A. | quality |
| B. | plane |
| C. | direction |
| D. | atoms |
| Answer» D. atoms | |
| 1013. |
                 it is type of stacking faults |
| A. | twinns |
| B. | glide |
| C. | climb |
| D. | intrisic |
| Answer» E. | |
| 1014. |
at 450 the resolved shear stress is |
| A. | minimum |
| B. | maximum |
| C. | zero |
| D. | none of the above |
| Answer» C. zero | |
| 1015. |
               this is type of slip systems. |
| A. | glide |
| B. | slip |
| C. | twinns |
| D. | none of the above |
| Answer» B. slip | |
| 1016. |
the resolved shear stress of a unit cell in nickel is N/mm2 if a tensile stress of 13.7 Mpa is applied. Take angle between the axial force and slip direction is 450 and angle between axial force and normal to slip is 540 |
| A. | 2.3 |
| B. | 5.7 |
| C. | 5.2 |
| D. | 6.1 |
| Answer» C. 5.2 | |
| 1017. |
the machinery used for hot working is than used for cold working |
| A. | cheaper |
| B. | expensive |
| C. | same |
| D. | depends on mertals used |
| Answer» D. depends on mertals used | |
| 1018. |
if resolved shear stress is maximum, it is given by |
| A. | σt |
| B. | 2σt |
| C. | 4σt |
| D. | 0.5σt |
| Answer» E. | |
| 1019. |
in case of hot working of metals, there is higher possibility of |
| A. | oxidation |
| B. | decarburizat ion |
| C. | both a and b |
| D. | none of the above |
| Answer» D. none of the above | |
| 1020. |
the possibility of oxidation is higher in case of working of metals |
| A. | hot |
| B. | cold |
| C. | both |
| D. | none of the above |
| Answer» B. cold | |
| 1021. |
  cold working requires higher than hot working |
| A. | temperature |
| B. | time |
| C. | energy for plastic deformation |
| D. | none of the above |
| Answer» D. none of the above | |
| 1022. |
it is possible to continuosly work on metal during working |
| A. | hot |
| B. | cold |
| C. | both |
| D. | none of the above |
| Answer» B. cold | |
| 1023. |
wire drawing is a type of |
| A. | cold working |
| B. | hot working |
| C. | cold working followed by hardening |
| D. | none of the above |
| Answer» B. hot working | |
| 1024. |
there are no residual internal stresses after hot working because |
| A. | metal is annealed before hot working |
| B. | there are no dislocations |
| C. | there is simultaneou s working and recrystalliza tion |
| D. | all of the above |
| Answer» D. all of the above | |
| 1025. |
in working of metals, the microstructure is distorted |
| A. | hot |
| B. | cold |
| C. | both |
| D. | none of the above |
| Answer» C. both | |
| 1026. |
hot forging is a type of |
| A. | cold working |
| B. | hot working |
| C. | cold working followed by hardening |
| D. | none of the above |
| Answer» C. cold working followed by hardening | |
| 1027. |
strain hardening followed by annealing is known as |
| A. | cold working |
| B. | hot working |
| C. | strain hardening |
| D. | all of the above |
| Answer» C. strain hardening | |
| 1028. |
during grain growth takes place |
| A. | new grains are formed |
| B. | no change in |
| C. | larger grains are formed |
| D. | all of the above |
| Answer» D. all of the above | |
| 1029. |
after the recrystalllization stage |
| A. | hardness and tensile strength reduces |
| B. | internal stresses reduces whereas corrosion resistance increases |
| C. | ductility increases |
| D. | all of the above |
| Answer» E. | |
| 1030. |
    new grain formation take place in stage of annealing treatment |
| A. | recovery |
| B. | grain growth |
| C. | recrystalliza tion |
| D. | none of the above |
| Answer» D. none of the above | |
| 1031. |
the process of formation of new grains starts by the process of |
| A. | recovery |
| B. | nucleation |
| C. | grain growth |
| D. | none of the above |
| Answer» C. grain growth | |
| 1032. |
nucleation starts at areas of |
| A. | low energy |
| B. | high energy |
| C. | randomly |
| D. | none of the above |
| Answer» C. randomly | |
| 1033. |
during which stage of annealing there is no major change in microstructure ? |
| A. | recrystalliza tion |
| B. | recovery |
| C. | grain growth |
| D. | none of the above |
| Answer» C. grain growth | |
| 1034. |
the heat treatment which is used to reduce the internal stresses after cold working is called as |
| A. | hardeninig |
| B. | annealing |
| C. | carburising |
| D. | quenching |
| Answer» C. carburising | |
| 1035. |
during recovery part of annealing treatment, which of the following properties are improved noticeably? |
| A. | hardness, electrical resistance, tensile strength |
| B. | electrical resistance, tensile strength, corrosion resistance |
| C. | tensile strength, corrosion resistance, ductility |
| D. | internal stresses, electrical resistance, corrosion resistance |
| Answer» E. | |
| 1036. |
the process by which the internal stresses are reduced in cold worked metal is called |
| A. | strain hardening |
| B. | hot working |
| C. | heat treatment |
| D. | cold treatment |
| Answer» D. cold treatment | |
| 1037. |
the and property of metals decrease due to cold working |
| A. | hardness, electrical conductivity |
| B. | tensile strength, electrical conductivity |
| C. | electrical resistance, internal stresses |
| D. | corrosion resistance, ductility |
| Answer» E. | |
| 1038. |
the property of metals increases and property decreases due to cold working |
| A. | hardness, electrical conductivity |
| B. | ductility, electrical conductivity |
| C. | electrical resistance, internal stresses |
| D. | corrosion resistance, ductility |
| Answer» B. ductility, electrical conductivity | |
| 1039. |
the stress required to produce same deformation is higher in case of                         polycrystalline material as compared to polycrystalline materials |
| A. | coarse garined, fine grained |
| B. | fine grained, coarse grained |
| C. | a or b |
| D. | none of the above |
| Answer» D. none of the above | |
| 1040. |
the and property of metals increase due to cold working |
| A. | hardness, electrical conductivity |
| B. | tensile strength, electrical conductivity |
| C. | electrical resistance, internal stresses |
| D. | corrosion resistance, ductility |
| Answer» D. corrosion resistance, ductility | |
| 1041. |
the mechanism of plastic deformation in polycrystalline material is than the mechanism in single crystal structure |
| A. | simpler |
| B. | complex |
| C. | same |
| D. | random |
| Answer» C. same | |
| 1042. |
Frank-Reed source is associated with - |
| A. | vacancy and interstitial defect |
| B. | reductiion in dislocations |
| C. | multiplicati on of dislocations |
| D. | none of the above |
| Answer» D. none of the above | |
| 1043. |
working of metal below crystallization temperature is known as |
| A. | cold working |
| B. | hot working |
| C. | any one of above |
| D. | none of the above |
| Answer» B. hot working | |
| 1044. |
for a given metal its recrystallization temperature depends on |
| A. | amonut of cold working |
| B. | grain size |
| C. | melting temperature s |
| D. | all of the above |
| Answer» E. | |
| 1045. |
working of metal above crystallization temperature is known as |
| A. | cold working |
| B. | hot working |
| C. | any one of above |
| D. | none of the above |
| Answer» C. any one of above | |
| 1046. |
finer is the grain size - |
| A. | more is recrystalliza tion temperature |
| B. | lesser is the recrystalliza tion temperature |
| C. | recrystalliza tion temperature remains same |
| D. | none of the above |
| Answer» C. recrystalliza tion temperature remains same | |
| 1047. |
work hardening is the phenomenon observed if metal is worked the recrystallization temperature |
| A. | above |
| B. | below |
| C. | independent of |
| D. | none of the above |
| Answer» D. none of the above | |
| 1048. |
after intial cold working, the stress required to further deform the material is |
| A. | same |
| B. | lower |
| C. | higher |
| D. | random |
| Answer» D. random | |
| 1049. |
the phenomenon by virtue of which metals become harder and stronger without any heat treatment is called |
| A. | strain hardening |
| B. | work hardening |
| C. | all of the above |
| D. | none of the above |
| Answer» D. none of the above | |
| 1050. |
FCC metals have higher ductility than BCC metals since _ |
| A. | fcc metals have higher |
| B. | fcc metals have lower |
| C. | fcc metals have lower |
| D. | fcc metals have higher |
| Answer» C. fcc metals have lower | |