Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Winter 5th Sem New 2152307 Plastic Extrusion Technology Previous Question Paper
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ? V (New) EXAMINATION ? WINTER 2019
Subject Code: 2152307 Date: 29/11/2019
Subject Name: Plastic Extrusion 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) Fill in the blanks:
1. Extruder suitable for processing UHMWPE is _____
2. Die used for films is _________________
3. Function of Thrust bearing block is ____________
03
(b) Define : Breaker plate , Reduction Gear Box, Extrusion , L/D ratio 04
(c) Diffferentiate between Single and Twin Screw Extruders in detail. 07
Q.2 (a) Why is hopper cooling necessary in hopper throat? 03
(b) Estimate the B-10 life of a thrust bearing given that:
P = 45 MPa N =125 rpm K = 10/3
B-10 std = 1,00,000 hrs
04
(c) Discuss various types of heating systems in screw extruders in detail. 07
OR
(c) What is Devolatilization? Discuss in detail with diagrams 07
Q.3 (a) Discuss manufacture of suction hoses with neat line diagram. 03
(b) Discuss Screw terminology like helix angle, pitch, flight depth, flight
land , L/D ratio and Compression Ratio. Also mention significance.
04
(c) With a neat line diagram, discuss manufacture of Monofilaments . 07
OR
Q.3 (a) What is the role of reduction gear box? How many types of reduction
gear boxes are avialble in market? Give differences.
03
(b) Differentiate between corotating and counter rotating twin screw
extruder
04
(c) With a neat line diagram, discuss manufacture of wires and cables 07
Q.4 (a) Differentiate between screen pack and breaker plate. 03
(b) Differentiate between AC and DC motors 04
(c) With a neat line diagram, discuss manufacture of LDPE films. 07
OR
Q.4 (a) Discuss about mixing screws with diagrams. 03
(b) Discuss in detail, grooved barrel technology. 04
(c) With a neat line diagram, discuss manufacture of HDPE Pipes. 07
Q.5 (a) What are the key features of an extrusion line manufacturing
HMHDPE films.?
03
(b) What is IBC? Explain with advantages and disadvantages 04
FirstRanker.com - FirstRanker's Choice
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ? V (New) EXAMINATION ? WINTER 2019
Subject Code: 2152307 Date: 29/11/2019
Subject Name: Plastic Extrusion 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) Fill in the blanks:
1. Extruder suitable for processing UHMWPE is _____
2. Die used for films is _________________
3. Function of Thrust bearing block is ____________
03
(b) Define : Breaker plate , Reduction Gear Box, Extrusion , L/D ratio 04
(c) Diffferentiate between Single and Twin Screw Extruders in detail. 07
Q.2 (a) Why is hopper cooling necessary in hopper throat? 03
(b) Estimate the B-10 life of a thrust bearing given that:
P = 45 MPa N =125 rpm K = 10/3
B-10 std = 1,00,000 hrs
04
(c) Discuss various types of heating systems in screw extruders in detail. 07
OR
(c) What is Devolatilization? Discuss in detail with diagrams 07
Q.3 (a) Discuss manufacture of suction hoses with neat line diagram. 03
(b) Discuss Screw terminology like helix angle, pitch, flight depth, flight
land , L/D ratio and Compression Ratio. Also mention significance.
04
(c) With a neat line diagram, discuss manufacture of Monofilaments . 07
OR
Q.3 (a) What is the role of reduction gear box? How many types of reduction
gear boxes are avialble in market? Give differences.
03
(b) Differentiate between corotating and counter rotating twin screw
extruder
04
(c) With a neat line diagram, discuss manufacture of wires and cables 07
Q.4 (a) Differentiate between screen pack and breaker plate. 03
(b) Differentiate between AC and DC motors 04
(c) With a neat line diagram, discuss manufacture of LDPE films. 07
OR
Q.4 (a) Discuss about mixing screws with diagrams. 03
(b) Discuss in detail, grooved barrel technology. 04
(c) With a neat line diagram, discuss manufacture of HDPE Pipes. 07
Q.5 (a) What are the key features of an extrusion line manufacturing
HMHDPE films.?
03
(b) What is IBC? Explain with advantages and disadvantages 04
(c) With a neat line diagram, discuss manufacture of biaxially oriented
films.
07
OR
Q.5 (a) Discuss thrust bearing block of twin screw extruders 03
(b) Discuss the process of nitriding in detail. 04
(c) Discuss raw material selection criteria for extrusion in detail. 07
*************
FirstRanker.com - FirstRanker's Choice
This post was last modified on 20 February 2020