Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Winter 7th Sem New 2173613 Specialty Pigments And Recent Development In Pigment Technology Previous Question Paper
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ? VII (New) EXAMINATION ? WINTER 2019
Subject Code: 2173613 Date: 23/11/2019
Subject Name: Specialty Pigments & Recent development in Pigment Technology
Time: 10:30 AM TO 01:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
MARKS
Q.1 (a) Give the list factors in which the metallic appearance is depends.
How do you calculate the flop index?
03
(b) Discuss the structure of TiO2-Mica pigment with the four existing
interfaces.
04
(c) Explain the model used for flake orientation with diagrammatical
representation. Discuss the optical properties of absorption and
metal effect pigment.
07
Q.2 (a) Discuss about chemical release coating with respect to antifouling
coating.
03
(b) What is fouling? Discuss the two main types of underwater
antifouling coatings.
04
(c) Explain the pigment such as cuprous oxide, Copper pigments, and
mercuric oxide based system used in antifouling coating.
07
OR
(c) Explain the behavior of a biocide based antifouling system with
suitable schematic illustration.
07
Q.3 (a) Explain the following terms:
(i) Quantum well (ii) Quantum wire (iii) Quantum wire
03
(b) Discuss the properties of Nano Materials. 04
(c) Explain the synthesis of silver nano particles by using following
reducing agents like sodium citrate, ascorbate, and sodium
borohydride.
07
OR
Q.3 (a) What are the variables controlling Pearl Effect? 03
(b) Explain the applications of Pearlescent Pigments? 04
(c) Explain the concept of Luminescence, Fluorescence and
Phosphorescence with the help of Jablonski Diagram?
07
Q.4 (a) What do you mean by Metal Flop? 03
(b) What are the properties of Luminescent pigments? 04
(c) Give the classification scheme of effect pigments on the basis of
opacity or optical impression?
07
OR
Q.4 (a) What is Flip Flop Effect? Explain with suitable example. 03
(b) What are the applications of Luminescent pigments? 04
(c) Establish the difference between: Leafing & Non leafing
Aluminum pigments with suitable diagram
07
Q.5 (a) What is Corrosion? Explain with suitable schematic mechanism. 03
(b) Discuss the following anticorrosive pigments: (i) Chromates (ii)
Molybdates
04
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1
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ? VII (New) EXAMINATION ? WINTER 2019
Subject Code: 2173613 Date: 23/11/2019
Subject Name: Specialty Pigments & Recent development in Pigment Technology
Time: 10:30 AM TO 01:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
MARKS
Q.1 (a) Give the list factors in which the metallic appearance is depends.
How do you calculate the flop index?
03
(b) Discuss the structure of TiO2-Mica pigment with the four existing
interfaces.
04
(c) Explain the model used for flake orientation with diagrammatical
representation. Discuss the optical properties of absorption and
metal effect pigment.
07
Q.2 (a) Discuss about chemical release coating with respect to antifouling
coating.
03
(b) What is fouling? Discuss the two main types of underwater
antifouling coatings.
04
(c) Explain the pigment such as cuprous oxide, Copper pigments, and
mercuric oxide based system used in antifouling coating.
07
OR
(c) Explain the behavior of a biocide based antifouling system with
suitable schematic illustration.
07
Q.3 (a) Explain the following terms:
(i) Quantum well (ii) Quantum wire (iii) Quantum wire
03
(b) Discuss the properties of Nano Materials. 04
(c) Explain the synthesis of silver nano particles by using following
reducing agents like sodium citrate, ascorbate, and sodium
borohydride.
07
OR
Q.3 (a) What are the variables controlling Pearl Effect? 03
(b) Explain the applications of Pearlescent Pigments? 04
(c) Explain the concept of Luminescence, Fluorescence and
Phosphorescence with the help of Jablonski Diagram?
07
Q.4 (a) What do you mean by Metal Flop? 03
(b) What are the properties of Luminescent pigments? 04
(c) Give the classification scheme of effect pigments on the basis of
opacity or optical impression?
07
OR
Q.4 (a) What is Flip Flop Effect? Explain with suitable example. 03
(b) What are the applications of Luminescent pigments? 04
(c) Establish the difference between: Leafing & Non leafing
Aluminum pigments with suitable diagram
07
Q.5 (a) What is Corrosion? Explain with suitable schematic mechanism. 03
(b) Discuss the following anticorrosive pigments: (i) Chromates (ii)
Molybdates
04
2
(c) Explain the mechanism of corrosion resistance by barrier pigments
with proper schematic diagram.
07
OR
Q.5 (a) What are thermo chromic pigments? 03
(b) What are anti-corrosive pigments? What are the types of anti-
corrosive pigments?
04
(c) Give the mechanism of passivation of Iron by chromate pigments? 07
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This post was last modified on 20 February 2020