STRUCTURE & FABRICATION TECHNOLOGY CLASS XII
1 2 3 4 5
S.No. Subject Periods/Week Examination Total
Theory Prac. Total Theory Prac. Marks
Marks: Hrs. Marks: Hrs.
1. Language I 7 - 7 100 3 100
2. Language II or 7 - 7 100 3 100
Mathematics (041)
As per Academic Stream
3 General Foundation 4 1 5 80 3 20 3 100
Course
4. Vocational Elective Papers
I. Engg. Science 1 7 8 70 3 30 3 100
a. Engg. Drawing (0) (4) - (40) - - - -
b. Workshop (1) (3) - (30) - - - -
Technology
II. Fabrication 3 5 8 40 3 60 3 100
Technology II
III. Fabrication 3 5 8 40 3 60 3 100
Technology III
5. Physical & Health - - 2 - - - - -
Education
Additional Subjects (optional)
I. Applied Physics 3 2 5 60 3 40 3 100
II. Civil Engg. 3 2 5 60 3 40 3 100
95
GENERAL FOUNDATION COURSE Class XII
(Part I & II same as given in Electrical Technology on Page no. 25)
ELECTIVE I
ENGINEERING SCIENCE Class XII
(Same as given in Electrical Technology on Page No. 28)
96
ELECTIVE II
FABRICATION TECHNOLOGY II
3 Hours Class XII Marks: 40
Theory
1. Pipes and pipe joints
Classification of pipes according to materials used and field of application. Types of pipe
fittings. Cutting, threading and jointing of pipes. Laying of pipelines. 8
2. Metal cutting processes
Introduction to different metal cutting processes.
Comparative study of following machine tools for machining operations (only specifications,
relative advantages and suitability of each machine tool for different manufacturing
processes):-
Lathe, Shaper, planer, slotter, milling machine, Broaching machine, Boring machine,
Grinding machines.
Introduction to- different types of cutting tools. (Types of chips, speed, feeds and depth of cut,
cutting fluids.) 10
3. Surface Finish
Primary texture, secondary texture, Errors of forms, Designation of surface roughness as per
BIS specifications 3
4. Protective coatings
Necessity of metallic and Non-metallic coatings: Metallic coatings; Principles and processes of
Electroplating and Galvanising. Anodizing. Their applications. 8
5. Non-metallic coatings
Physical properties and uses of varnishes, paints and enamels. Methods of surface preparation
and methods of application such as spraying, powder coating. 8
Removal of paints and varnishes.
Prevention of corrosion. 8
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PRACTICAL
FABRICATION TECHNOLOGY II 3 Hours Marks: 60
1. Cutting and threading of pipes of different materials. (at least three excercises)
2. Joining of pieces of pipes with sockets, elbows, Tees, Reducers and Unions.
3. Practice of laying a pipe line,
4. Turning of job to given size and tolerance.
5. Preparing a vee-block on a shaper.
6. Introduction to Horizontal Milling Machine; names of parts and their functions; safety precautions, Tool and Job holding.
7. Practice of plain milling on a M.S. job.
8. Milling a rectangular and Vee Groove on a Horizontal Milling machine.
9. Preparation of surface prior to painting. Application of under-coats.
10. Painting practice on sheet metal surface.
11. Polishing practice on a Teak wood job.
12. Painting practice on a casting.
13. Practice of painting by powder coating process.
List of Experiments 1. To make assembly of pipe using elbow, socket, Tee Union, Stop cock, reducers Plus, Tap etc. Cutting of thread at two ends should be compulsory and for the rest threaded pipes (Nipples) can be used. (Atleast three excercises of cutting and threading of pipes of different materials).
2. To cut V-SLOT on one side only, after shaping the respective surface on shaper machine.
3. To face and finish the C.I. Surface and cut a rectangular slot.
Note: Each student should perform all the experiments during the session.
Marking Scheme Note: 1. Marks for sessional work will be awarded by the teacher concerned.
2. Students may be asked to attempt any one of the experiments.
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Distribution of Marks
Experiment 40
Experiment I
Thread cutting 10
Assembly of pipe line 20
Finishing and Accuracy 10
Experiment II-III
Facing 10
U or V-Slot 20
Finishing and Accuracy 10
Viva Voce 10
(i) Questions related to the expts assigned 3
(ii) Questions related to the remaining expts 4
(iii) Questions based on related concepts 3
Sessional Work 10
(i) All listed expts performed 5
(ii) Maintenance of proper records 5
Guidelines for Examiners (Same as given in Electrical Technology page 31)
General Instructions to the students
SUGGESTED LIST OF TOOLS AND EQUIPMENT
1. Pipe Vice with stand 4 Nos.
2. Bench Vice (100 mm) 6 Nos.
3. Pipe wrenches 300 mm, 450 mm 2 Nos. each
4. Pipe threading dies of different sizes with stocks and handle 2 Sets
5. Milling Machine (Universal), with accessories and attachments 1 No.
6. Painting material such as Brushes of different sizes etc. 4 Sets
7. Set of tools, cutters etc. 2 Sets
8. Working tables 4 Nos.
9. Marking and Measuring tools 1 Set
10. Shaper Machine 300 mm stroke with accessories 1 No.
99
ELECTIVE III
FABRICATION TECHNOLOGY III
3 Hours Class XII Marks: 40
Theory
1. Fits and Tolerance
Concept of interchangeability, limits of size, basic size, Tolerance, Tolerance Zone, System of
Tolerances, Introduction to Fits, Types of fits, BIS specifications. 8
2. Jigs and Fixtures
Function of Jig and Fixture, Types of Jigs, Types of fixtures, Examples of simple jigs and
fixtures, and their use in structural fabrication. 8
3. Measuring instruments
Standard of measurement, Study of vernier calliper, outside and inside micrometers, vernier
Depth Gauge, Combination set, Dial Indicator, Limit Gauges, Screw Pitch Gauges, feeler
gauges. 8
4. Quality control
Concept of Probability, sampling inspections and inspection by attributes. Introduction to
statistical quality control, normal distribution, standard deviation, process capability. 8
5. Costing and estimation
Difference between estimating and costing. Importance of estimation and costing, Importance
of realistic estimates. Elements of cost, fixed cost & variable cost, Depreciation, Calculation of
machine time for turning, screw cutting, shaping. Standard time, its computation. 8
PRACTICAL
FABRICATION TECHNOLOGY III 3 Hours Marks: 40
1. Making a Drill Template
2. Making a Drilling Jig with suitable fixture.
3. Making of Jigs and Fixtures for welding work.
4. Making of Jigs and Fixtures for simple structural work.
5. Measurement with Vernier Callipers.
6. Measurements with external and internal Micrometer.
7. Measurement with Depth Gauge.
8. Measurement with Dial Gauge using surface plate.
9. Measurement with combination set.
10. Measurement of thread characteristics.
11. Measurement exercise in a shop situation.
12. From a given data prepare N & R Charts.
13. Exercise involving cost estimation of components.
LIST OF EXPERIMENTS 1. To make a fixture for welding work square, rectangular and triangular works.
2. To demonstrate the use of Vernier Calliper, Micrometer, Depth Gauge, Dial Indicator etc. for a given experiment.
Note: Each student should perform all the experiments during the session.
MARKING SCHEME Note: 1. Marks for sessional work will be awarded by the teachers concerned.
2. Students may be asked to perform any one of the experiments.
DISTRIBUTION OF MARKS Experiment 40
For experiment No. I (Refer syllabus for practicals S. No. 1 to 4). Drilling/Welding 20
Design of Template Fixture 10
Finishing and Accuracy 10
For experiment No. II (Refer syllabus for Practicals S.No. 5 to 11). 1. Measurement with Vernier Micrometer, depth gauge, Dial gauge combination set and thread characteristics 30
2. Accuracy in Measurement 10
Viva-Voce 10
(i) Questions related to the experiment assigned 3
(ii) Questions related to the remaining experiments 4
(iii) Questions based on related concepts 3
101
Sessional Work 10
(i) All listed experiments performed 5
(ii) Maintenance of proper records 5
Guidelines for Examiners (Same as given in Electrical Technology page 31)
General Instruction to Candidates
LIST OF TOOLS AND EQUIPMENT
(As per Practical Paper II)
1. Work Benches 4 Nos.
2. Bench Vices 100 mm 3 Nos.
3. Tools kit which include different types and sizes of files, Try square, steel rules, Hack-saw frame, hammer centre punches, chisels etc. 4 Sets
4. Surface plates 2 Nos
5. Anvil with stand, 50 Kgs. 1 No.
6. Vernier Calliper 2 Nos.
7. Micrometer 0-25 mm 2 Nos.
8. Depth Gauge 2 Nos.
9. Dial Gauge set 2 Nos.
10. Combination set 2 Nos.
11. Thread Gauge 2 Nos.
12. Feeler Gauge 2 Nos.
13. Drilling Machine 12 mm. (Pedestal type) with Drill chuck and key. 1 No.
14. Drills of different sizes 1 Set
15. Vernier Micrometer 1 No.
ADDITIONAL SUBJECT (OPTIONAL)
I. APPLIED PHYSICS
Class XII
(Same as given in Electrical Technology on Page No. 38)
II. CIVIL ENGINEERING
Class XII
(Same as given in Automobile Technology on Page No. 72)
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SUGGESTED LIST OF RECOMMENDED REFERENCE BOOKS