Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2018 Winter 7th Sem New 2172307 Frp Technology And Composites Previous Question Paper
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VII (NEW) EXAMINATION ? WINTER 2018
Subject Code: 2172307 Date: 29/11/2018
Subject Name: FRP Technology and composites
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) (1) Resin injection molding is an intermediate process
between _____________ molding and ____________
molding.
(2) List any two inhibitors used for the Polyester resin.
(3) ________________ techniques is used for
manufacturing pipes, tubes, cylinders and spheres.
03
(b) (1) Gel coat resins contain a_______________ additive to
prevent runs and sags from forming during application
and cure.
(2) Which basic materials are used to make a polyester
resin?
(3) Polyester resin with high chemical resistance are
frequently made from
(a)ethylene glycol (b)dipropylene glycol (c) bisphenol A
(4) List the purposes of adding styrene during the
manufacture of polyester resin.
04
(c) Give advantages and limitations of FRP. 07
Q.2 (a) Define term composites. Explain role of fibers in
composites.
03
(b) Explain role of matrix in composites. 04
(c) List and explain about types of glass fibers according to
their application and commercial forms of availability.
07
OR
(c) Draw and explain manufacturing process of glass fiber. 07
Q.3 (a) Short note on: Natural fibers. 03
(b) Write note on Gel coat. 04
(c) Explain manufacturing process of carbon fibers with neat
sketch(Using PAN as precursors)
07
OR
Q.3 (a) List the advantages of carbon fibers. 03
(b) List causes and remedies of the following faults during
FRP manufacturing : (1) Fish eyes or craters (2) blisters
04
(c) Write a note on: GRP molds. 07
Q.4 (a) List factors influencing designing of FRP. 03
(b) Explain Dough or Bulk molding compound. 04
(c) Explain Hand layup techniques with neat sketch. List
advantages and disadvantages of it compare to other
process.
07
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Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VII (NEW) EXAMINATION ? WINTER 2018
Subject Code: 2172307 Date: 29/11/2018
Subject Name: FRP Technology and composites
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) (1) Resin injection molding is an intermediate process
between _____________ molding and ____________
molding.
(2) List any two inhibitors used for the Polyester resin.
(3) ________________ techniques is used for
manufacturing pipes, tubes, cylinders and spheres.
03
(b) (1) Gel coat resins contain a_______________ additive to
prevent runs and sags from forming during application
and cure.
(2) Which basic materials are used to make a polyester
resin?
(3) Polyester resin with high chemical resistance are
frequently made from
(a)ethylene glycol (b)dipropylene glycol (c) bisphenol A
(4) List the purposes of adding styrene during the
manufacture of polyester resin.
04
(c) Give advantages and limitations of FRP. 07
Q.2 (a) Define term composites. Explain role of fibers in
composites.
03
(b) Explain role of matrix in composites. 04
(c) List and explain about types of glass fibers according to
their application and commercial forms of availability.
07
OR
(c) Draw and explain manufacturing process of glass fiber. 07
Q.3 (a) Short note on: Natural fibers. 03
(b) Write note on Gel coat. 04
(c) Explain manufacturing process of carbon fibers with neat
sketch(Using PAN as precursors)
07
OR
Q.3 (a) List the advantages of carbon fibers. 03
(b) List causes and remedies of the following faults during
FRP manufacturing : (1) Fish eyes or craters (2) blisters
04
(c) Write a note on: GRP molds. 07
Q.4 (a) List factors influencing designing of FRP. 03
(b) Explain Dough or Bulk molding compound. 04
(c) Explain Hand layup techniques with neat sketch. List
advantages and disadvantages of it compare to other
process.
07
2
OR
Q.4 (a) List the different types of fibers arrangement in FRP. 03
(b) List the advantages of Resin Transfer Molding. 04
(c) Explain filament winding process with neat sketch. 07
Q.5 (a) List different types of Glycols used in manufacturing of
Polyester resin.
03
(b) Explain role of Catalyst, inhibitors and accelerators for
matrix material in FRP.
04
(c) Explain Vacuum bag and Pressure bag molding process
in detail with neat sketch.
07
OR
Q.5 (a) List the material preparation techniques for FRP. 03
(b) List various types of commercially available unsaturated
polyester resins.
04
(c) Explain Pultrusion process with neat sketch. 07
*************
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This post was last modified on 20 February 2020