MCQOPTIONS
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MCQOPTIONS
This section includes 166 Mcqs, each offering curated multiple-choice questions to sharpen your Electrical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
The graphite is anisotropic. |
| A. | highly |
| B. | lightly |
| C. | not |
| D. | very less |
| Answer» B. lightly | |
| 52. |
Bonding between the layers is |
| A. | strong |
| B. | weak |
| C. | very tightly bonded |
| D. | not bonded |
| Answer» C. very tightly bonded | |
| 53. |
Graphite has layered structure. |
| A. | three dimensional structure |
| B. | pyramidal |
| C. | planar |
| D. | bipyramidal |
| Answer» D. bipyramidal | |
| 54. |
Annealing the homogeneous mixture to room temperature to retain its |
| A. | composition |
| B. | structure |
| C. | its properties |
| D. | composition, structure and its properties |
| Answer» E. | |
| 55. |
The ideal super conductors exhibit |
| A. | meissner effect |
| B. | mesmeric effect |
| C. | mesomeric effect |
| D. | monomeric effect |
| Answer» B. mesmeric effect | |
| 56. |
The constituents of this material that is yttrium, barium and copper are in |
| A. | 1:1:1 |
| B. | 1:2:2 |
| C. | 1:2:3 |
| D. | 1:2:1 |
| Answer» D. 1:2:1 | |
| 57. |
This functions as a super conductor at a critical temperature of |
| A. | 30ok |
| B. | 60ok |
| C. | 90ok |
| D. | 120ok |
| Answer» D. 120ok | |
| 58. |
Based on magnetic response super conductors are of types. |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 59. |
The normal metal passes into super conducting state at |
| A. | high temperature |
| B. | low temperature |
| C. | critical temperature |
| D. | no temperature |
| Answer» D. no temperature | |
| 60. |
The shifting of electrons in super conductors is prevented by |
| A. | quantum effect |
| B. | threshold energy level |
| C. | energy barrier |
| D. | orbitals |
| Answer» B. threshold energy level | |
| 61. |
The earliest superconductors to be studied elaborately is |
| A. | niobium alloy |
| B. | copper alloys |
| C. | steel alloys |
| D. | iron alloy |
| Answer» B. copper alloys | |
| 62. |
The phenomena of super conductors was first discovered by |
| A. | kammerlingh onnes |
| B. | neils bohr |
| C. | richard smalley |
| D. | otto lehman |
| Answer» B. neils bohr | |
| 63. |
A solid that offers no passage of electricity is called super conductors. |
| A. | conductance |
| B. | inductance |
| C. | resistance |
| D. | impedance |
| Answer» D. impedance | |
| 64. |
5 METHODS OF SYNTHESIS(ARC-GROWTH, LASER ABLATION, CVD ROUTES, PLASMA CVD) |
| A. | 1992 |
| B. | 1991 |
| C. | 1990 |
| D. | 1993 |
| Answer» C. 1990 | |
| 65. |
A spray of CNT mixture on ceramic coatings gives the ability to resist |
| A. | stains |
| B. | damage |
| C. | smoothness |
| D. | clearness |
| Answer» C. smoothness | |
| 66. |
CNT can be used for coating and absorption on the surface |
| A. | fibre |
| B. | design |
| C. | stains |
| D. | marks |
| Answer» B. design | |
| 67. |
CNT can store |
| A. | nitrogen |
| B. | carbondioxide |
| C. | hydrogen |
| D. | peroxides |
| Answer» D. peroxides | |
| 68. |
The microwave absorptions are used for |
| A. | military radars |
| B. | solar cells |
| C. | space elevators |
| D. | stab proof |
| Answer» C. space elevators | |
| 69. |
CNT is used to make |
| A. | paper batteries |
| B. | high voltage batteries |
| C. | car batteries |
| D. | clock batteries |
| Answer» B. high voltage batteries | |
| 70. |
CNT is |
| A. | conductor |
| B. | insulator |
| C. | semi conductor |
| D. | impure metal |
| Answer» D. impure metal | |
| 71. |
The nano tube may without friction. |
| A. | slides |
| B. | overlaps |
| C. | under laps |
| D. | collides |
| Answer» D. collides | |
| 72. |
Multi walled CNT are concentric nano tubes. |
| A. | single |
| B. | double |
| C. | triple |
| D. | multiple |
| Answer» E. | |
| 73. |
Standard single walled CNT withstands a pressure up to without deformation. |
| A. | 1gpa |
| B. | 2gpa |
| C. | 20gpa |
| D. | 25gpa |
| Answer» E. | |
| 74. |
CNT posses strength up to |
| A. | 100gpa |
| B. | 200gpa |
| C. | 400gpa |
| D. | 300gpa |
| Answer» B. 200gpa | |
| 75. |
CNT s are the strongest and stiffest materials in |
| A. | tensile strength |
| B. | ductility |
| C. | elasticity |
| D. | energy |
| Answer» B. ductility | |
| 76. |
The substrate is heated to |
| A. | 200c |
| B. | 300c |
| C. | 400c |
| D. | 700c |
| Answer» E. | |
| 77. |
Chemical vapour decomposition is developed in an year |
| A. | 2001 |
| B. | 2002 |
| C. | 2006 |
| D. | 2007 |
| Answer» E. | |
| 78. |
Plasma torch method produces of CNT per minute. |
| A. | 1gms |
| B. | 2gms |
| C. | 3gms |
| D. | 4gms |
| Answer» C. 3gms | |
| 79. |
Plasma torch method is similar to the |
| A. | laser ablation |
| B. | arc discharge |
| C. | chemical vapour decomposition |
| D. | electrolysis |
| Answer» C. chemical vapour decomposition | |
| 80. |
A water cooled surface is used in the process to collect |
| A. | nano particles |
| B. | nano tubes |
| C. | nano spheres |
| D. | nano sheets |
| Answer» C. nano spheres | |
| 81. |
The current used in the arc discharge method is about |
| A. | 100ma |
| B. | 200ma |
| C. | 300ma |
| D. | 400ma |
| Answer» B. 200ma | |
| 82. |
Carbon nano tubes are also called as |
| A. | bucky tubes |
| B. | bulky tubes |
| C. | bulk tubes |
| D. | buck balls |
| Answer» B. bulky tubes | |
| 83. |
Carbon nano tubes are the sheets of graphite about |
| A. | 0.1nm |
| B. | 0.2nm |
| C. | 0.3nm |
| D. | 0.4nm |
| Answer» E. | |
| 84. |
The bond length of the C60 is |
| A. | 1.1 ao |
| B. | 1.2 ao |
| C. | 1.3 ao |
| D. | 1.4 ao |
| Answer» E. | |
| 85. |
The vander-waals diameter of C60 is |
| A. | 1.1nm |
| B. | 1.2nm |
| C. | 1.3nm |
| D. | 1.4nm |
| Answer» B. 1.2nm | |
| 86. |
The structure of C60 is called as |
| A. | isohedron |
| B. | truncated isohedron |
| C. | trigonal |
| D. | trigonal bipyramidal |
| Answer» C. trigonal | |
| 87. |
The buckminister fullerene is naturally occurring element found in |
| A. | earth |
| B. | soot |
| C. | smoke |
| D. | fog |
| Answer» C. smoke | |
| 88. |
The chain, two dimensional and three dimensional polymers are formed under |
| A. | vacuum |
| B. | high pressure |
| C. | low pressure |
| D. | no pressure |
| Answer» C. low pressure | |
| 89. |
Spherical particles based on the multiple layers surrounding a buck ball core is called |
| A. | nano onions |
| B. | nano particles |
| C. | nano clusters |
| D. | nano materials |
| Answer» B. nano particles | |
| 90. |
The fullerenes that are larger in diameter than nano tubes and having walls of different thickness are |
| A. | mega tubes |
| B. | carbon nano tubes |
| C. | bucky ball clusters |
| D. | polymers |
| Answer» B. carbon nano tubes | |
| 91. |
Mega tubes are used for |
| A. | transport |
| B. | chemical industries |
| C. | laboratories |
| D. | preparation of compounds |
| Answer» B. chemical industries | |
| 92. |
Hollow tubes of very small dimensions are called as |
| A. | mega tubes |
| B. | carbon nano tubes |
| C. | bucky ball clusters |
| D. | polymers |
| Answer» C. bucky ball clusters | |
| 93. |
The smallest bucky ball cluster is |
| A. | c6 |
| B. | c8 |
| C. | c10 |
| D. | c20 |
| Answer» E. | |
| 94. |
In fullerenes, the graphene sheets are linked with |
| A. | hexagonal rings |
| B. | octagonal rings |
| C. | trigonal rings |
| D. | decagonal rings |
| Answer» B. octagonal rings | |
| 95. |
The fullerenes are composed with |
| A. | graphene sheets |
| B. | graphite |
| C. | lead |
| D. | other carbon materials |
| Answer» B. graphite | |
| 96. |
The figure shows a FET using CNT. Identify CNT. |
| A. | bucky balls |
| B. | soccer balls |
| C. | cricket balls |
| D. | tennis balls |
| Answer» B. soccer balls | |
| 97. |
The main purpose of CNTs in fuel cells is |
| A. | production of energy |
| B. | active medium |
| C. | catalyst |
| D. | storage |
| Answer» E. | |
| 98. |
Identify the process. |
| A. | synthesis of c60 |
| B. | synthesis of cnts |
| C. | chemical vapour deposition |
| D. | carbon discharge |
| Answer» C. chemical vapour deposition | |
| 99. |
The carbon tubes have high conductivity. |
| A. | true |
| B. | false |
| Answer» B. false | |
| 100. |
Carbon nanotubes display magnetoresistance at low temperature. |
| A. | true |
| B. | false |
| Answer» B. false | |