Download GTU BE/B.Tech 2019 Winter 7th Sem New 2172903 Production Planning And Maintenance Question Paper

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GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER- VII (New) EXAMINATION — WINTER 2019

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Instructions:

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1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.

1. 1. Convert 100 tex to Ne and Nm
   2. Discuss about different types of maintenance & its importance.

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   3. Calculate required no of ring frame and speed frame spindle for the production of 2500 kg yarn of 40's combed. Where ring frame spindle speed 19500 rpm, time 8 hrs, waste 3%, t.p.i-25, draft 22, efficiency 90%. For speed frame flyer rpm 1400 efficiency 85% & tpi 1.3
2. 1. Write production formula for modern comber in lb/day.
   2. It is required to produce 8000 kg of combed yarn of 50's ne. Calculate total raw cotton required for the same.

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3. 1. Twill woven fabric need to prepare of about 2000 meter length. Where EPI & PPI are 40 & 30.warp and weft count is 30's, warp and weft crimp 6%. Calculate weight of warp and weft required for this lot if reed width is of 48 inch.

      OR

      A comber machine running at 425 nips/min, with feed/nip of 7 mm. calculate no of comber required for a 5000 lb/shift. Consider lap-hank of 0.0125 and noil % of 10. Efficiency of machine is 80%
4. 1. Discuss key routine maintenance points for winding machine
   2. An air jet loom running at 900 rpm for .22 picks variety. Calculate time required to weave 3000 meter of fabric on a loom with 85% efficiency.

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   3. Calculate the number of water jet weaving machines to be installed to match with the production capacity of a yarn preparatory unit having 9 texturing machines each having 120 spindles and running at 1100 mts/min with 94 % efficiency. These water jet weaving machines are tunning at 700 rpm with 95 % efficiency and fabric having reed/pick of 30/20, 62.inches width and using 240 denier of yarn as warp & weft.

      OR

      Enlist daily & weekly maintenance check points for ring frame
5. 1. A carding machine running at 100 doffer rpm with 90% efficiency. Sliver hank 0.15. Calculate production in kg/day
   2. Prepare spin plan and production schedule for the 1000kg/shift rotor yarn of 16's ne. Consider suitable data for a modern machine combination.

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   3. Calculate total number of ends and picks for a fabric having following details :
      • Reed/Pick - 60/362,
      • Fabric Length — 4000 Meters,
      • Fabric Width — 56 Inches
      Prepare warp and weft production schedules if the weights of warp and weft are 40000 kgs and 30000 kgs respectively. Assume modern sequence of machines.

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1. 1. Warp/Weft: 16s/16s Ne, EPI/PPI: 72/44, R.S.:- 157 cm, length wise contraction: 7%. Find out GSM of fabric. Also work out requirement of warp and weft yarn per 100 m of fabric.(ignore selvedge and waste)

      OR

      What will be the hank deliver on a lap former if sliver hank is of 0.17. Draft and doubling are 1.3 & 18 respectively.
2. 1. Discuss key routine maintenance points for carding

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   2. If the warping machine speed is 550 Mts/Min, using 32s yarn count and efficiency % is 55, calculate the number of machines required to supply beams per month to the sizing unit having 7 sizing machines. Assume set length of 25000 metres and 480 ends/beam on warping machine. Use following details for sizing machines :
      • ends/beam — 3200
      • length of warp sheet per beam — 350 mts
      • speed — 60 mts/min
      • efficiency % - 50

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3. 1. What will be the length of yarn in a cotton yarn package weighing 3 kg, count of yarn is 40's
   2. Calculate no of beams produced on a sizing machine in a shift from the following data. Speed 50 mpm, effi:- 50%, no of ends/beam 2200, length of warp sheet/beam 250 meter.
   3. State the importance of maintenance in weaving department. Explain the daily, weekly, monthly and quarterly/yearly check points for automatic weaving machines in detail.

      OR

      Write production formula for a double-width high speed rapier loom.

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4. 1. A set of 6 beam each containing 30000 meter of warp is to be prepared. If speed is 500 mpm & effi.-80%. Calculate a time required to prepare a set.
   2. Prepare warp & weft production schedules to-produce 80,000 kgs of grey fabric per day having following details :
      • reed/pick — 82/48
      • warp/weft — 30s/36s
      • fabric width — 42 inches

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      • weave — 3/1 twill

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