Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2018 Winter 7th Sem Old 172903 Production Planning And Maintenance Previous Question Paper
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VII (OLD) EXAMINATION ? WINTER 2018
Subject Code: 172903 Date: 19/11/2018
Subject Name: Production Planning & Maintenance
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.
Q.1 (a) In a weaving unit 40 projectile looms are running with following quality
of fabrics.
Fabric Details:
R.S.: 56? Reed count: 80s
Length contraction: 5% Warp/Weft: 2/80sNe / 50s Ne
Ends/dent: 2 GSM: 160
Loom RPM: 320 Loom Effi.(%) : 89
Loom width: 130?
Calculate how many warp beams will be required per week for the above
shed if maximum length of yarn on a beam is 3000 m
(ignore selvedge during calculation)
09
(b) Calculate the time after which all cans will be exhausted on draw frame
from following data.
Doublings: 8 DF Speed: 450 mpm
DF Efficiency: 85% Count of sliver: 4.1 ktex
Wt. of sliver in one can: 27.8 lbs Draft: 8
05
Q.2 (a) A fabric is to be produced having 40 inch Reed Space. The fabric has a
weft way stripe of 50 threads per repeat comprising of 10 dark threads
and 40 white threads. Find out requirement of dark and white weft yarn
per 100 linear m of fabric. The PPI are 60.Count of the weft yarn is 2/80s
Ne.
07
(b) Calculate how many times warping creel needs to be changed from
following data.
Maximum length on warper?s beam : 20000 yds
Length of yarn on weaver?s beam : 2000 yds
No. of ends in weaver?s beam : 5328
No. of weaver?s beams required : 20
Count of yarn : 50s Ne
No. of threads in warping creel : 592
Wt. of yarn on package : 1.75 kg
07
OR
(b) A mill wants to produce 8000 m of a particular fabric every day. Calculate
number of bobbins required from winding and pirn winding departments
from following details.
R.S. : 45? EPI : 80 Weight of fabric: 175 gsm
Count : 40s / 34s Ne
Length of yarn on wound bobbin : 70000 m
Winding speed/eff. : 1100 mpm / 85%
Pirn winding speed/eff. : 500 ypm / 75%
Length contraction : 6%
Weight of yarn on pirn : 1.2 ozs
07
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Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VII (OLD) EXAMINATION ? WINTER 2018
Subject Code: 172903 Date: 19/11/2018
Subject Name: Production Planning & Maintenance
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.
Q.1 (a) In a weaving unit 40 projectile looms are running with following quality
of fabrics.
Fabric Details:
R.S.: 56? Reed count: 80s
Length contraction: 5% Warp/Weft: 2/80sNe / 50s Ne
Ends/dent: 2 GSM: 160
Loom RPM: 320 Loom Effi.(%) : 89
Loom width: 130?
Calculate how many warp beams will be required per week for the above
shed if maximum length of yarn on a beam is 3000 m
(ignore selvedge during calculation)
09
(b) Calculate the time after which all cans will be exhausted on draw frame
from following data.
Doublings: 8 DF Speed: 450 mpm
DF Efficiency: 85% Count of sliver: 4.1 ktex
Wt. of sliver in one can: 27.8 lbs Draft: 8
05
Q.2 (a) A fabric is to be produced having 40 inch Reed Space. The fabric has a
weft way stripe of 50 threads per repeat comprising of 10 dark threads
and 40 white threads. Find out requirement of dark and white weft yarn
per 100 linear m of fabric. The PPI are 60.Count of the weft yarn is 2/80s
Ne.
07
(b) Calculate how many times warping creel needs to be changed from
following data.
Maximum length on warper?s beam : 20000 yds
Length of yarn on weaver?s beam : 2000 yds
No. of ends in weaver?s beam : 5328
No. of weaver?s beams required : 20
Count of yarn : 50s Ne
No. of threads in warping creel : 592
Wt. of yarn on package : 1.75 kg
07
OR
(b) A mill wants to produce 8000 m of a particular fabric every day. Calculate
number of bobbins required from winding and pirn winding departments
from following details.
R.S. : 45? EPI : 80 Weight of fabric: 175 gsm
Count : 40s / 34s Ne
Length of yarn on wound bobbin : 70000 m
Winding speed/eff. : 1100 mpm / 85%
Pirn winding speed/eff. : 500 ypm / 75%
Length contraction : 6%
Weight of yarn on pirn : 1.2 ozs
07
2/3
Q.3 (a) Find out efficiency of following looms from pick counter readings taken
for 2 hours.
Loom no. Pick Counter Reading RPM PPI
Start End
1 10312 31696 98 90
2 09834 32514 210 80
3 18979 42739 220 52
07
(b) Write all maintenance check points for winding and ordinary plain power
loom.
07
OR
Q.3 (a) Weaving department has following types of looms and the fabric varieties
to be produced on particular loom. Calculate total requirement of
yarn.(Assume 6 % contraction for each fabric)
Loom details:
Type of loom Max. R.S. RPM Eff. % No. of looms
--------------------------------------------------------------------------------------
1. Air jet 190 cm 650 90 24
2. Rapier 220 cm 500 90 24
3. Autoloom 56? 200 90 48
Fabric Details & Requirement:
No. EPI / PPI R.S? Wp / Wt. Req.(m) To be woven on
--------------------------------------------------------------------------------------
1 80 / 52 42 34 / 34 35000 Autoloom
2 120 / 96 56 2/80 / 50 30000 Air jet
3 80 / 80 50 2/60 / 2/60 28000 Rapier
10
(b) Derive equation to work out length of yarn per weft bobbin, length of
cloth produced per weft bobbin and no. of weft bobbins per loom per hour.
What is the effect of change in PPI on number of weft bobbins required
per hour?
04
Q.4 (a) Write atleast five maintenance check points for carding machine 04
(b) An OE Spinning Plant has following requirement for a month (30 working
days at 24 hrs per day)
Count Requirement TM Rotor speed rpm eff.%
9s 22,000 kgs 4.6 75000 95
Calculate no. of OE spindles required to produce above counts. Also
calculate no. of cards required from following data.
Doffer dia: 27? Doffer rpm: 35 Tension draft: 1.01
Count of sliver: 4.91 ktex Efficiency of Card : 85%
10
OR
Q.4 (a) A texturising plant has following requirement per day:
Count(Denier) Required Production in kg
75/36 1200
75/36/400 0800
Calculate no. of spindles required of SDS 600(94%efficiency) and of TFO
(running at 13000 rpm and 91 % efficiency).
07
(b) There is a requirement of 300 kgs/day of 40s 100% cotton and 600
kgs/day of 54s PC blended (67:33)material. How many comber shifts
required to cater requirement of material. Nips/min is 250 and feed/nip is
5 mm. Other data is as given below:
Comber type Count lap wt.g/m noil % eff. %
Bicoiler 8 head 54s pc 68 15 90
07
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Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VII (OLD) EXAMINATION ? WINTER 2018
Subject Code: 172903 Date: 19/11/2018
Subject Name: Production Planning & Maintenance
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.
Q.1 (a) In a weaving unit 40 projectile looms are running with following quality
of fabrics.
Fabric Details:
R.S.: 56? Reed count: 80s
Length contraction: 5% Warp/Weft: 2/80sNe / 50s Ne
Ends/dent: 2 GSM: 160
Loom RPM: 320 Loom Effi.(%) : 89
Loom width: 130?
Calculate how many warp beams will be required per week for the above
shed if maximum length of yarn on a beam is 3000 m
(ignore selvedge during calculation)
09
(b) Calculate the time after which all cans will be exhausted on draw frame
from following data.
Doublings: 8 DF Speed: 450 mpm
DF Efficiency: 85% Count of sliver: 4.1 ktex
Wt. of sliver in one can: 27.8 lbs Draft: 8
05
Q.2 (a) A fabric is to be produced having 40 inch Reed Space. The fabric has a
weft way stripe of 50 threads per repeat comprising of 10 dark threads
and 40 white threads. Find out requirement of dark and white weft yarn
per 100 linear m of fabric. The PPI are 60.Count of the weft yarn is 2/80s
Ne.
07
(b) Calculate how many times warping creel needs to be changed from
following data.
Maximum length on warper?s beam : 20000 yds
Length of yarn on weaver?s beam : 2000 yds
No. of ends in weaver?s beam : 5328
No. of weaver?s beams required : 20
Count of yarn : 50s Ne
No. of threads in warping creel : 592
Wt. of yarn on package : 1.75 kg
07
OR
(b) A mill wants to produce 8000 m of a particular fabric every day. Calculate
number of bobbins required from winding and pirn winding departments
from following details.
R.S. : 45? EPI : 80 Weight of fabric: 175 gsm
Count : 40s / 34s Ne
Length of yarn on wound bobbin : 70000 m
Winding speed/eff. : 1100 mpm / 85%
Pirn winding speed/eff. : 500 ypm / 75%
Length contraction : 6%
Weight of yarn on pirn : 1.2 ozs
07
2/3
Q.3 (a) Find out efficiency of following looms from pick counter readings taken
for 2 hours.
Loom no. Pick Counter Reading RPM PPI
Start End
1 10312 31696 98 90
2 09834 32514 210 80
3 18979 42739 220 52
07
(b) Write all maintenance check points for winding and ordinary plain power
loom.
07
OR
Q.3 (a) Weaving department has following types of looms and the fabric varieties
to be produced on particular loom. Calculate total requirement of
yarn.(Assume 6 % contraction for each fabric)
Loom details:
Type of loom Max. R.S. RPM Eff. % No. of looms
--------------------------------------------------------------------------------------
1. Air jet 190 cm 650 90 24
2. Rapier 220 cm 500 90 24
3. Autoloom 56? 200 90 48
Fabric Details & Requirement:
No. EPI / PPI R.S? Wp / Wt. Req.(m) To be woven on
--------------------------------------------------------------------------------------
1 80 / 52 42 34 / 34 35000 Autoloom
2 120 / 96 56 2/80 / 50 30000 Air jet
3 80 / 80 50 2/60 / 2/60 28000 Rapier
10
(b) Derive equation to work out length of yarn per weft bobbin, length of
cloth produced per weft bobbin and no. of weft bobbins per loom per hour.
What is the effect of change in PPI on number of weft bobbins required
per hour?
04
Q.4 (a) Write atleast five maintenance check points for carding machine 04
(b) An OE Spinning Plant has following requirement for a month (30 working
days at 24 hrs per day)
Count Requirement TM Rotor speed rpm eff.%
9s 22,000 kgs 4.6 75000 95
Calculate no. of OE spindles required to produce above counts. Also
calculate no. of cards required from following data.
Doffer dia: 27? Doffer rpm: 35 Tension draft: 1.01
Count of sliver: 4.91 ktex Efficiency of Card : 85%
10
OR
Q.4 (a) A texturising plant has following requirement per day:
Count(Denier) Required Production in kg
75/36 1200
75/36/400 0800
Calculate no. of spindles required of SDS 600(94%efficiency) and of TFO
(running at 13000 rpm and 91 % efficiency).
07
(b) There is a requirement of 300 kgs/day of 40s 100% cotton and 600
kgs/day of 54s PC blended (67:33)material. How many comber shifts
required to cater requirement of material. Nips/min is 250 and feed/nip is
5 mm. Other data is as given below:
Comber type Count lap wt.g/m noil % eff. %
Bicoiler 8 head 54s pc 68 15 90
07
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Conventional 6 head 40s c 75 15 90
Q.5 (a) Ring frame department of a spinning unit supplies following yarns (from
same mixing) to a weaving unit per day:
Count Fibres TM Production in kg
32s K 100 % 4.1 500
40s C Cotton 4.0 600
Work out number of blow room laps required per hour from following
data.
Lap roller speed: 5 mpm efficiency : 85%
Count of lap : 490 g/m lap length : 40 yds
(assume waste% at all stages)
10
(b) Calculate the production of a ring frame from following data:
Count : 42sNe TM : 4.2
Spindles: 1008 Spindle speed/eff.% : 21000/85%
04
OR
Q.5 (a) Calculate weight of doff, time after which doff is to be taken and time
after which roving bobbin will be exhausted on ring frame from following
data.
Speed of RF: 15000 rpm Eff.: 87% Count of yarn: 42sNe
TM: 4.0 Wt. of roving bobbin: 3.5 lbs
Waste at RF: 2.5 % Count of roving: 0.59 ktex
No. of spindles: 880 Length of yarn on ring bobbin: 4200 m
07
(b) Calculate time after which the lap will be exhausted on card from
following data.
Lap weight: 490 ktex Lap length: 40 yd Doffer dia.: 27?
Doffer rpm: 30 Efficiency: 86 % Tension draft: 1.01
Draft at card: 100
07
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This post was last modified on 20 February 2020