1. Nanomaterials are the materials with at least one dimension measuring less than
Correct : C. 100 nm
2. A material with one dimension in Nano range and the other two dimensions are large is called
Correct : C. quantum well
3. The colour of the nano gold particles is
Correct : D. variable
4. The melting point of particles in nano form
Correct : B. decreases
5. The first talk about nano-technology was given by
Correct : D. richard feynman
6. Which of the processes of materials was not described as Nanotechnology?
Correct : B. creation
7. The initial tools used to help launch the nanoscience revolution were
Correct : C. scanning probe instruments
8. When semiconductors are reduced to nanometres they become pure conductors.
Correct : B. false
9. The major difference between the nano materials compared to the bulk form is the big fraction of the total number of atoms on the surface.
Correct : A. true
10. The size of atoms is nearly
Correct : B. 0.1 nm
11. The four types of Artificial nanomaterials are
Correct : D. carbon-based, metallic, composites and dendrimers
12. Solution of pure buckminsterfullerene has a colour of
Correct : B. purple
13. HyFn stands for
Correct : D. hydrated fullerene
14. Nano sized polymers built from branched units are called
Correct : A. dendrimers
15. Which property of nanoparticles provides a driving force for diffusion?
Correct : B. high surface area to volume ratio
16. On both ends of the CNTs, which carbon nanostructure is placed?
Correct : C. c60
17. Quantum dots can be used in
Correct : B. optoelectronics
18. Vesicle is a type of
Correct : D. supramolecular system
19. The response of a material due to the function of heat is known as
Correct : D. thermal property
20. Specific heat of materials is expressed in terms of
Correct : C. j/kg k
21. What effect does the addition of thermal energy have on a material?
Correct : B. thermal expansion
22. Which term is used to define the temperature at which a substance changes its status from solid to liquid?
Correct : B. melting point
23. The melting point of Iron (Fe) is
Correct : D. 1538oc
24. What effect do thermal variations in volume have on a body?
Correct : C. cracking
25. The temperature at which plastics begin to become softer and defer under a load is known as
Correct : D. heat distortion point
26. What’s the procedure in Top-down fabrication method?
Correct : C. bulk -> powder – > nano-particles
27. Which of the following is an example of Bottom Up approach?
Correct : B. colloidal dispersion
28. For milling operations, what kind of environment is preferred?
Correct : D. inert
29. What kind of metals are used for milling operations?
Correct : C. hard and brittle
30. The following flow chart is for which method?
Correct : D. microfabrication
31. CVD stands for
Correct : C. chemical vapour deposition
32. Photolithography is a type of patterning technique.
Correct : A. true
33. Chemical solution deposition is also known as
Correct : A. sol-gel
34. Typical precursor used in sol-gel are
Correct : C. metal alkoxides
35. The following is a bottom-up process.
Correct : A. true
36. Particles of ZrO2, Y2O2 and Nano whiskers have been produced by
Correct : B. cvc
37. Which gas serves as buffer gas in Laser ablation?
Correct : C. helium
38. Which of the following is an unconventional process of machining?
Correct : B. usm
39. Ultrasonic machining process can be used for
Correct : D. all of the mentioned
40. Which of the following is a conventional process of machining?
Correct : D. none of the mentioned
41. For machining of plastic material which of the unconventional process can be used effectively?
Correct : C. ultrasonic machining
42. Material removal rate in USM increases with
Correct : B. increase in volume of work material per impact
43. Material removal rate in USM increases with
Correct : D. increase in number of particle making impact per cycle
44. Material removal rate in USM increases with
Correct : C. increases in frequency
45. Element of machine which is used to convert high frequency electrical impulse into mechanical vibration in USM is known as
Correct : C. transducer
46. Which of the following elements of USM is used to apply working force during machining operation?
Correct : B. feeding unit
47. Material removal rate in USM increases with
Correct : D. increase in amplitude
48. 3 COLLOIDAL ROUTES, SELF-ASSEMBLY
Correct : A. 10-20 nm
49. Which of the following is a characteristic of a colloid?
Correct : B. it forms turbid layers
50. Where does colloidal solution find application in?
Correct : A. in milk industries
51. During an experiment, accidently iodine got mixed up with a biological sample of proteins and polys. Identify the smallest colloid that can be obtained during the process of separation.
Correct : B. amino acids
52. Which of the following form of colloid is considered to be the strongest colloid?
Correct : C. solid sol
53. Which of the following form of colloid is considered to be the lightest colloid?
Correct : A. gaseous foam
54. What is the size of normal an amino acid?
Correct : A. 1 to 2 nm
55. What is called a dispersion phase?
Correct : B. it is the secondary layer in which the colloidal particles are dispersed
56. What is called a dispersion medium?
Correct : C. it is where the dispersed phase is suspended
57. Which of the following is not a technique for fabrication of glass fibers?
Correct : C. lave ring method
58. technique is method of preparing extremely pure optical glasses.
Correct : D. vapor phase deposition (vpd)
59. Which of the following materials is not used as a starting material in vapor-phase deposition technique?
Correct : D. b2o3
60. P2O5 is used as a
Correct : A. dopant
61. How many types of vapor-phase deposition techniques are present?
Correct : B. two
62. uses flame hydrolysis stems from work on soot processes which were used to prepare the fiber with losses below 20 dB/km.
Correct : A. outside vapor phase oxidation
63. In modified chemical vapor deposition, vapor phase reactant such as pass through a hot zone.
Correct : A. halide and oxygen
64. is the stimulation of oxide formation by means of non-isothermal plasma maintained at low pressure in a microwave cavity surrounding the tube.
Correct : D. plasma-activated chemical vapor deposition (pcvd)
65. Only graded index fibers are made with the help of vapor-phase deposition techniques.
Correct : B. false
66. Modified Chemical Vapor Deposition (MCVD) process is also called as an inside vapor phase oxidation (IVPD) technique.
Correct : A. true
67. When does an integrated circuit exhibit greater degree of freedom and electrical performance?
Correct : C. in semiconductor and films technology
68. Give the thickness range of the film used in thin film technology
Correct : B. 0.02-8 mils
69. Which technology is used to get cheap resistors and capacitors?
Correct : B. thin film technology
70. How is the process of film deposition carried out in cathode sputtering?
Correct : A. slower than evaporation method
71. How a uniform film with good crystal structure is attained in cathode sputtering process?
Correct : C. high energy particle diffuse through low pressure gas and deposits on the substrate
72. Which process is used to deposit metals on glass, ceramic and plastic?
Correct : C. electroless plating technique
73. Electroplating technique is suitable for
Correct : D. making conduction films of gold or copper
74. Which of the following process is involve in thick film technology
Correct : C. silk screening
75. An ancient process used till today for production of circuit films is,
Correct : D. screen printing technique
76. What is the advantage of using Surface Mount Technology?
Correct : D. use leaded or leadless components
77. Which of the following is an example of top- down approach for the preparation of nanomaterials?
Correct : C. mechanical grinding
78. Which of the following is an example of bottom-up approach for the preparation of nanomaterials?
Correct : B. dip pen nano-lithography
79. The properties like melting point, solubility, color, etc changes on varying the
Correct : A. size
80. The properties like dispersibility, conductivity, etc changes on varying the
Correct : C. surface properties
81. Quantum confinement results in
Correct : D. energy gap in semiconductor is proportional to the inverse of the square of size
82. Which of the following is the principal factor which causes the properties of nanomaterials to differ significantly from other materials?
Correct : D. all of the mentioned
83. Select the incorrect statement from the following options.
Correct : A. self-assembly is a top-down manufacturing technique
84. Which of the following is the application of nanotechnology to food science and technology?
Correct : D. all of the mentioned
85. What are the advantages of nano-composite packages?
Correct : D. all of the mentioned
86. The efficiency of today’s best solar cell is about
Correct : B. 40%
87. The configuration of Buckminsterfullerene is
Correct : C. 20 hexagon and 12 pentagon
88. C60 is soluble in
Correct : D. benzene
89. CNTs stands for
Correct : A. carbon nanotubes
90. CNTs are capped on both ends with which carbon nanostructure?
Correct : C. c60
91. The metallic tubes have which kind of structure?
Correct : A. armchair
92. The carbon tubes have high conductivity.
Correct : A. true
93. Carbon nanotubes display magnetoresistance at low temperature.
Correct : A. true
94. Identify the process.
Correct : B. synthesis of cnts
95. The main purpose of CNTs in fuel cells is
Correct : D. storage
96. The figure shows a FET using CNT. Identify CNT.
Correct : A. bucky balls
97. The fullerenes are composed with
Correct : A. graphene sheets
98. In fullerenes, the graphene sheets are linked with
Correct : A. hexagonal rings
99. The smallest bucky ball cluster is
Correct : D. c20
100. Hollow tubes of very small dimensions are called as