GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER- III (New) EXAMINATION — WINTER 2019
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Subject Code: 2132905 Date: 7/12/2019Subject Name: Basic Engineering in Textile
Time: 02:30 PM TO 05:00 PM Total Marks: 70
Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
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MARKS
Q.1 (a) Differentiate between method study and work measurement. 03
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(b) Explain predictive maintenance in detail. 04(c) State and explain Cochran boiler. 07
Q.2 (a) Differentiate between breakdown maintenance and preventive maintenance. 03
(b) What is flow process chart? Discuss the utility for method study engineer. 04
(c) By graphical method solve the following LPP 07
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Maximize Z =2x1+3x2Subject to, x1+x2< 30
x1>3
X2<12
x1-x2>0
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0<x1<20.OR
(c) Find the basic feasible solution of the following transportation problem by north-west corner rule. 07
| 1 | 2 | 3 | 4 | 5 | Availability | |
|---|---|---|---|---|---|---|
| A | 4 | 3 | 1 | 2 | 6 | 80 |
| B | 5 | 2 | 3 | 4 | 5 | 60 |
| C | 3 | 0 | 5 | 1 | 6 | 40 |
| D | 2 | 4 | 4 | 5 | 3 | 20 |
| Requirement | 60 | 60 | 30 | 40 | 10 |
Q.3 (a) What are three time estimates used in context of PERT? 03
(b) Explain humidification by steam injection with neat sketch. 04
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(c) Using simplex method solve the LPP 07Maximize Z = 15X1+ 6X2+ 9X3+ 2X4
Subject to, 2X1+ X2+ 5X3+ 6X4<20
3X1+ X2+ 3X3+ 25X4< 24
7X1+X4<70
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X1>0, X2>0, X3>0, X4>0OR
Q.3 (a) Explain humidification and dehumidification. 03
(b) Explain critical path. 04
(c) Solve the following assignment problem 07
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| P | Q | R | S | T | |
|---|---|---|---|---|---|
| 1 | 11 | 17 | 8 | 16 | 20 |
| 2 | 9 | 7 | 12 | 6 | 15 |
| 3 | 13 | 16 | 15 | 12 | 16 |
| 4 | 21 | 24 | 17 | 28 | 26 |
| 5 | 14 | 10 | 12 | 11 | 13 |
How should the job can be assigned so that total cost is minimized
Q.4 (a) Explain the work sampling with example. 03
(b) Explain the Least cost method briefly with example. 04
(c) Differentiate fire tube and water tube boilers. 07
OR
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Q.4 (a) What do you understand by scale and sludge formation in boilers? 03(b) List down the various techniques of work measurement. 04
(c) A small maintenance project consist of the following jobs, whose precedence relationships are given below 07
| Job | 1-2 | 1-3 | 2-4 | 2-5 | 3-4 | 3-6 | 4-5 | 4-6 | 5-6 | 6-7 |
|---|---|---|---|---|---|---|---|---|---|---|
| Duration (days) | 8 | 7 | 3 | 8 | 5 | 12 | 1 | 14 | 3 | 14 |
Find the critical path and total project duration.
Q.5 (a) Define the boiler. List essential parts of boiler. 03
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(b) State the rules of constructing project network in CPM and PERT method. 04(c) Describe the algorithm for the solution of assignment problem. 07
OR
Q.5 (a) What are the internal and external feed water treatments of water? 03
(b) What is man and machine chart? How it is to make a method analysis? 04
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(c) A project is represented by the network. The activity times are given below. Determine expected time, variance and critical path 07| Activity | 1-2 | 1-3 | 1-4 | 2-5 | 2-6 | 3-5 | 4-7 | 5-7 | 6-7 |
|---|---|---|---|---|---|---|---|---|---|
| Optimistic Time | 5 | 8 | 26 | 15 | 16 | 6 | 7 | 3 | 7 |
| Most Likely Time | 8 | 20 | 33 | 20 | 18 | 9 | 10 | 4 | 8 |
| Pessimistic Time | 10 | 22 | 40 | 25 | 20 | 12 | 12 | 5 | 9 |
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