ELECTRICAL 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
Mathematics (041) 7 7 100 3 100
(As per Academic Stream)
3. General Foundation
Course 4 1 5 80 3 20 3 100
4. Vocational Elective Papers
I. Engg. Science 1 7 8 70 3 30 3 100
a. Engg. Drawing (0) (4) - (40) - - - -
b. Workshop
Technology (1) (3) - (30) - (30) (3) -
II. Electrical
Machines 3 5 8 40 3 60 3 100
III. Electrical
Appliances 3 5 8 40 3 60 3 100
5. Physical & Health
Education - - 2 - - - - -
Additional Subjects (optional)
I. Applied Physics 3 2 5 60 3 40 3 100
II. Mechanical Engg. 3 2 5 60 3 40 3 100
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GENERAL FOUNDATION COURSE (Common for Automobile, Structure & Fabrication and Airconditioning & Refrigeration Technology)
3 Hours Class XII Marks: 100
Part 1: (Compulsory to all vocational courses) (50 marks)
A. BUSINESS MANAGEMENT AND ENTREPRENEURSHIP (30 marks)
1. Management of Business
Elementary treatment/ exposure to basic conceptual framework of the topics listed
below:
I. Basic functions 6
II. Marketing management 6
III. Financial management 6
IV. Production management 6
V. Personnel management 6
B. COMPUTATIONAL SKILLS (10 marks)
1. (a) Solution of linear equations and thair applications to problems of commercial
mathematics
(b) System of linear equations and inequation in two variables. Applications in
formulation of simple linear programming problems. 5
2. Statistics: Raw data, bar charts & histogram; frequency tables; frequency polygon;
ogive; mean; median and mode of ungrouped and grouped data; standard
deviation; introduction to mortality tables price index etc. introduction to
computers. 5
C. ENVIRONMENTAL EDUCATION 5 marks)
a) Modernisation of agriculture and environment; irrigation, Waterlogging, use
of fertilizers, pesticides, soil erosion, land degradation (desertification &
deforestation), silting and drying of water resources.
b) Rational utilization, conservation and regeneration of environmental
resources (soil, air, water plant energy, minerals)
D. RURAL DEVELOPMENT (5 marks)
Principles and goals of rural development, major problems/constraints in rural
development in India.
Part II - APPLIED CHEMISTRY (30 marks)
1. Structure of Atom: Rutherford model of the structure of atom, Bohr's theory of electrons
Quantum numbers and their significance, de-Broglie equation and uncertainity principle.
Electronic configuration of 1 to 30 elements 3
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2. Periodic Properties of Elements: Periodic law, periodic table, periodicity in properties
like atomic radii and volume, ionic radii, Ionization energy and electron affinity. Division
of elements into s.p.d. and f blocks. 3
3. Chemical Bonds: Electrovalent, Covalent and Co-ordinate bond and their properties.
Metallic bonding (electron cloud model) and properties (like texture, conductance,
lustre, ductility and malleability). 3
4. Fuel and their Classification: Definition, characteristics, classification into solid, liquid
and gaseous fuel. Petroleum and brief idea of its refining into various factions and their
characteristics and uses. Calorific value of fuel, Gaseous fuels-preparation, properties,
composition and use of producer gas, water gas and oil gas. 3
5. Water: Impurities in water, methods of their removal, hardness of water, its types, causes
and removal, Disadvantages of hard water in boilers, pH value and its determination by.
calorimetric method. 3
6. Problems based on Gravimetric and Volumetric Analysis: 3
7. Metals: Cast iron and its properties, effect of sulphur, silicon and phosphorus as
impurities in cast iron. Elementary knowledge of heat treatment of steels-hardening,
tempering, annealing, normalizing and case hardening. 3
8. Alloys: Definition, classification and necessity for making alloys. Composition,
properties and uses of following alloys: Brass, Bronze, Gun-metal and Duralumin. Effect
of carbon, nickel, chromium, manganese on steel. 3
9. Corrosion: Its meaning, theory of corrosion, prevention of corrosion by various methods
using metallic and non-metallic coatings. 3
10. Plastics and Polymers: Plastic-thermo-plastic and thermo-setting. Introduction of
Polythene, P.V.C.; Nylon, synthetic rubber and phenol-formal-dehyde resin. Their
application in industry. 3
PRACTICAL
APPLIED CHEMISTRY 3 Hours Marks: 20
1. To find the strength in grams per litre of the given solution of sodium hydroxide with the help of standard oxalic acid solution.
2. Find the strength in grams per litre of given sodium hydroxide solution with the help of standard sodium-carbonate solution and intermediate solution of an acid.
3. Determine the strength of oxalic acid solution in grams per litre using standard oxalic acid and intermediate solution of potassium permanganate.
4. Determine the total alkalinity in ppm in the given sample of water using standard sulphuric acid.
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5. To find the amount of chloride ions present in water using silver nitrate solution (potassium chromate as indicator).
6. Estimate the amount. of copper in the given sample of copper sulphate or copper alloy solution using a standard solution of sodium thiosulphate.
7. Estimate the amount of ash in the given sample of coal or coke or charcoal.
8. Estimate the amount of moisture in the given sample of coal or coke.
9. Study the reaction of dilute and concentrated acid with any two metals (iron, copper, zinc, magnesium).
10. To arrange Mg, Zn, Fe, Pb, Sn, Cu according to their activity by studying the interaction of these metals with their salt solutions.
11. To determine the pH value of water.
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ELECTIVE I
ENGINEERING SCIENCE (Common for Automobile Tech., Structure & Fabrication and Airconditioning & Refrigeration)
3 Hours Class XII Marks: 70
A. ENGINEERING DRAWING (40 marks)
1. Section of Solids: Concept of sectioning. Projection of sections of Poly-Hedron
including their true shapes. 9
2. Development of Surfaces: Development of Poly-Hedron & solids of revolution
including their sections. 8
3. Fasteners: Introduction to temporary & permanent fasteners: Rivetted joints &
welded joints. Types of screw threads, conventional symbols for Internal and
External threads, ISI specifications. Drawing of Bolts, Nuts studs & locking devices.
Their aplication in Engineering field. 9
4. Keys & Cotters: Different types of keys, sleeve & cotterjoints, socket & spigot joints
knuckle joints. 7
5. Couplings: Solid & split coupling, flanged coupling simple & protected. 7
B. WORKSHOP TECHNOLOGY (30 marks)
1. Welding: General characteristics of welded joints. Principle of welding. Types of
welding processes and their brief description e.g. gas welding and are welding, high
pressure gas welding and low pressure gas welding. DC welding and AC welding,
Brief description of Resistance welding, spot welding, butt welding, seam welding,
submerged are welding, thermit welding, inert gas welding, tungsten inert gas
welding, tungsten inert gas welding, mig. atomic hydrogen welding.
Gas welding and AC welding tools and equipments, selection of electrodes, fluxes,
currents, torches and equipments. Specifications of tools, equipment and materials
according to BSI. Different types of flames and their application in welding. Defects
in welding and their detection. 12
2. Metallic and Non-Metallic Coatings: Necessity of metallic and non-metallic
coatings. Principles and processes of electroplating and galvanising, their
applications. Properties and uses of varnishes, paints including primers and
enamels. 9
3. Plastics Technology: Introduction to thermoplastic and thermo-setting plastics,
General properties, injection moulding, Compression moulding-process and
equipment, other plastic moulding methods. Machining plastics. 9
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PRACTICAL
WORKSHOP TECHNOLOGY 3 Hours Marks: 30
1. Welding Shop: Arc welding-introduction to tools and equipments, safety precautions, use of welding transformer/welding, machine, method of selecting current, choice of electrode. Exercises involving surface and edge preparation, making of simple welding joints.
2. Gas Welding: Introduction to gas welding equipment, safety precautions, selection of gas pressure, welding torch, type of flame, flux, welding rod and welding technique. Exercises involving job preparation and making Single Joints. Brazing practice of brazing by gas.
3. Machine Shop: Introduction to various types of Drilling machine (portable Drilling Machine, Pillar type, Bench type, Radial drilling machine).
Simple Exercises involving the use of above machines.
Introduction to Lathe (Job mounting, Tool holding Devices).
Simple exercises on Lathe (Turning, Facing, Parting, Step Turning, Chamfering, Knurling, Groove cutting by Form tool).
4. Painting and Polishing: Introduction to paints and allied materials, exercises on surface, preparation, varnishing, spirit polishing painting-using brush and spray, casual painting.
LIST OF EXPERIMENTS
MACHINE SHOP 1. Drilling at specified position using a bench drilling machine.
2. Drilling holes upto 40 mm diameter, using a radial drilling machine.
3. Use of pillar type drilling machine for drilling hole upto 25 mm diameter.
4. Mounting a job on a lathe machine in the four jaw chuck.
5. Setting of various types of cutting tools in tool post of a lathe machine.
6. Facing, centering, plain turning and chamfering on a lathe machine.
7. Step Turning and parting of job on a lathe machine.
8. Knurling and grooving of a job on a lathe machine with the help of forming tool.
WELDING SHOP
a. Arc Welding 9. Introduction of tools and welding transformer for electric arc welding.
10. Safety precautions of arc welding.
11. Introduction to various types of electrodes for arc welding and selection of current.
12. Edge preparation and making a Butt-joint.
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13. Making a lap joint with the help of arc welding.
14. Making a T-joint with the help of arc welding.
15. Making a comer-joint with the help of arc welding.
b. Gas welding. 16. Demonstration of gas welding equipment including
(i) selection of gas pressure welding torches,
(ii) various types of welding rods, flames and fluxes.
17. Safety pracautions in gas welding.
18. Edge preparation and making Butt joint with the help of gas welding.
19. Making a lap-joint with the help of gas welding.
20. Making a T-joint with the help of gas welding.
21. Making a Corner-joint with the help of gas welding.
22. Brazing practice with the help of welding-torch.
Painting and Polishing Practices 1. Filling or putty application.
2. Staining
3. Sand preparing
4. Varnish Polishing
5. Spirit Polishing
6. Brush Painting
7. Spray painting.
NOTE: Each student should perform all the experiments and Practices during the session.
MARKING SCHEME 30 marks
Distribution of works
1. List of materials/tools/Machines/Equipment 4
2. Performing the experiment 12
3. Neatness of work 3
4. Viva Voce 6
i. Questions relating to the experiments assigned 2
ii. Questions relating to other experiments 2
iii. Questions based on related concepts 2
1. Sessional Marks 5
i. All listed experiments performed 2
ii. Maintenance of proper records pertaining to sessional
and on-job-training 3
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