Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2017 Winter 8th Sem New 2182103 Composite Materials Previous Question Paper
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VIII (NEW) EXAMINATION ? WINTER 2017
Subject Code: 2182103 Date: 07/11/2017
Subject Name: Composite Materials
Time:02:30 PM TO 05:00 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)
Justify the Role of composite materials for the advanced
applications.
03
(b)
Explain with schematic, Tensile Stress?Strain Behavior
of a continuous & aligned fiber composites.
04
(c)
Give detailed classification of composites on the basis
of construction
07
Q.2
(a)
Enlist the Suitable materials for Matrix &reinforements
for PMC, MMc& CMC?s.
03
(b)
Explain the functions of Matrix & Reinforcements in
composite material.
04
(c)
How are glass fibers produced by using conventional
method? What are the drawbacks of this method?
07
OR
(c)
Compare Properties of Metal Matrix composite &
Ceramic Matrix composites.
07
Q.3
(a)
What is Green Composite?
03
(b)
Explain Structural Composites in detail & Justify the
applications of Sandwich Panels in Aircraft
constructions.
04
(c)
Critically compare Properties of Carbon-fiber, Glass
Fiber and Aramid fiber reinforced composites also give
suitable example of each category of Fiber reinforced
composites.
07
OR
Q.3
(a)
What is critical fiberlength ?
03
(b)
Explain the influence of L/D ratio on the effective
strengthening & stiffening of the composite materials?
Distinguish between Optimal, Short & Continuous size
fiber
04
(c)
List various strengthening Mechanisms in composite
and Discuss Strengthening mechanics employed in
TDS-Ni & WC/ Co Composites
07
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Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VIII (NEW) EXAMINATION ? WINTER 2017
Subject Code: 2182103 Date: 07/11/2017
Subject Name: Composite Materials
Time:02:30 PM TO 05:00 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)
Justify the Role of composite materials for the advanced
applications.
03
(b)
Explain with schematic, Tensile Stress?Strain Behavior
of a continuous & aligned fiber composites.
04
(c)
Give detailed classification of composites on the basis
of construction
07
Q.2
(a)
Enlist the Suitable materials for Matrix &reinforements
for PMC, MMc& CMC?s.
03
(b)
Explain the functions of Matrix & Reinforcements in
composite material.
04
(c)
How are glass fibers produced by using conventional
method? What are the drawbacks of this method?
07
OR
(c)
Compare Properties of Metal Matrix composite &
Ceramic Matrix composites.
07
Q.3
(a)
What is Green Composite?
03
(b)
Explain Structural Composites in detail & Justify the
applications of Sandwich Panels in Aircraft
constructions.
04
(c)
Critically compare Properties of Carbon-fiber, Glass
Fiber and Aramid fiber reinforced composites also give
suitable example of each category of Fiber reinforced
composites.
07
OR
Q.3
(a)
What is critical fiberlength ?
03
(b)
Explain the influence of L/D ratio on the effective
strengthening & stiffening of the composite materials?
Distinguish between Optimal, Short & Continuous size
fiber
04
(c)
List various strengthening Mechanisms in composite
and Discuss Strengthening mechanics employed in
TDS-Ni & WC/ Co Composites
07
Q.4
(a)
Explain wettability with suitable figures
03
(b)
What is interface? Explain the role of interfaces in
composites and also mention some suitable treatment to
enhance the interfacial bond strength in composites
04
(c)
A composite made from 72 % volume of Glass fiber&
epoxy resin.Modulus of elasticity, Tensile strength of
epoxy & glass fiber are respectively, 41 ?102 MPa, 72
MPa , 76.5 ?103MPa & 2510 MPa. Evaluate, a) E &
T.S. of composite material in direction of alignment of
fiber. b) Load shared by Two Phases, Load is in
direction of alignment of fiber.
07
OR
Q.4
(a)
Draw a lay out for synthesis of Nano-composites.
Describe unique properties exhibited by Nano-
composites
03
(b)
Write Short note on : C-C composites
04
(c)
Draw a Schematic of Resin Transfer Moulding (RTM)
& list the components produced by this method.
07
Q.5
(a)
Discuss in brief with schematic the toughening
mechanisms in CMC composites.
03
(b)
Write Short note on Hybrid composites
04
(c)
With Neat Schematic explain Sol-Gel Synthesis method
of Glass fiber production method.
07
OR
Q.5
(a)
Write short note on: Pultrusion Process.
03
(b)
Draw a neat schematic of Vacuum bag moulding& list
the components produced using this process.
04
(c)
Explain with schematic process of Filament Winding
also give examples of the components produced using
this technique.
07
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This post was last modified on 20 February 2020