ISC Class 12 Syllabus 2023 Engineering Science (Revised)

ENGINEERING SCIENCE (867)

Note: The Syllabus for this Subject has not been changed.
This subject may not be taken with Physics. The examiners will attach importance to an
understanding of scientific principles and will look for
The syllabus is designed for candidates who have evidence that these have been studied practically. The
followed a course with a bias towards engineering. examiners may ask to see the practical notebooks.

CLASS XII

There will be two papers in the subject:
Paper I - Theory: 3 hours…… 80 Marks Paper II - Project Work ……. 20 Marks

PAPER I (THEORY): 80 MARKS
Note: All questions will be set in the S.I. System. The engines and in two and four-stroke internal
unit abbreviations to be used in all question papers in combustion engines. The oscillating cylinder
this subject will be those contained in the Guide to the steam engine is not required.
use of International System (SI) units SP; 5-1969
(Published by the Indian Standards Institution). 7. Momentum. Conservation of momentum,
including rate of change of momentum and
1. Strength of materials. Simple problems. Hooke's relationship with mass and acceleration.
law, stress and strain. Young's modulus. Tension Knowledge of coefficient of restitution is not
and compression. Elastic limit. Ultimate strength. required.
Factors of safety.
8. Magnetism. Magnetic properties of iron and steel.
2. Friction. Conditions affecting friction. Lubrication. The magnetic circuit; qualitative treatment only,
Conditions should include types of materials, their with examples from transformers and machines.
surface finish and wetness or dryness. The compass needle. Magnetic effect of current in
3. Limiting friction. Coefficients of friction. straight wire, single turn coil and solenoid, treated
qualitatively. Electromagnets and their simple
4. Work. Work done by constant and by varying applications. Relation of direction of current in
force; graphical representation of and calculations conductor and lines of magnetic force applied.
thereon. Energy, potential and kinetic. Examples of the application of electromagnets to
Conservation of energy and conversion into work, include electric trembler bell and relay.
work done in rotation. Torque.
5. Machines. Simple single-string pulley systems. 9. The simple circuit. Conductors and insulators.
Simple and differential wheel and axle. Weston Electromotive force, potential difference, current,
pulley block. Screw jack. Worm (single start quantity and resistance; the volt, ampere, coulomb
thread and wheel). Gear and belt drives. Velocity ampere-hour and ohm. Ohm's law. Measurement
ratio, mechanical advantage and efficiency. of resistance, including Wheatstone bridge,
Resistivity. Resistors in series and in parallel.
6. Power. Simple treatment of steam and internal
combustion engines. Indicators diagrams. 10. Heating effect of current. Energy and power.
Indicated mean effective pressure. Indicated and Conversion of electrical to mechanical energy and
brake horsepower. Methods of measurement of vice versa. The joule, watt, and kilowatt-hour.
power. Rope brake and Prony brake. Hydraulic Simple applications of heating effect. Effect of
power (as given by the product of constant temperature on resistance. Temperature
pressure and rate of volume change). Mechanical coefficient. Examples to include various domestic
efficiency. Relationship between rev/min and heating appliances and filament lamps.
working strokes per minute in double-acting steam
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11. Chemical effect of current field. Electrolytes. List of suggested assignments for Project Work:
Electrolysis. Electrochemical equivalent. 1. Show mathematically that the energy of a simple
Production of current by chemical action. Simple pendulum is conserved. Also draw and interpret
voltaic cell. Primary and secondary cells.
the following for the same:
Polarisation: prevention and removal. Cells in
series and in parallel. Chemical equations are not • displacement-time graph
required. • kinetic energy-displacement graph
12. Current-carrying conductor in magnetic field. The
• potential energy-displacement graph
D.C. motor including series and shunt windings. • total (mechanical) energy and displacement
Galvanometers, voltmeters and ammeters. Shunts graph.
and multipliers. A qualitative treatment of multiple 2. Study and represent graphically the work done on
D.C. motors is included. a body of mass m under the action of a constant
force and by a varying force. Show calculations
13. Electromagnetic induction: the laws of induction.
and discuss.
Back e.m.f. of motor. Starting resistance for D.C.
motor. Simple a.c. and D.C. generators. Relation 3. Study the fundamental forces in nature governing
of direction of lines of force, motion of conductor the diverse phenomena of the macroscopic and
and current in coil. Eddy currents. Transformers. microscopic world. Discuss the progress related to
The induction coil; the coil ignition system. A the unification of these forces.
qualitative treatment of multipole D.C. generators 4. You have studied about the strength of
is included. materials. In this context, discuss the following:
• Stress and strain, their types, Hooke’s law,
PAPER II (PROJECT WORK): 20 Marks Young’s modulus, elastic limit, permanent set
In addition to the syllabus prescribed above, candidates and ultimate strength.
are also required to be assessed in Project Work. • Take a stress-strain curve for a metal and mark
the relevant points on the graph.
• Is it correct that a material that stretches more
PROJECT WORK FOR CLASS XII is more elastic? Discuss with examples.
The Project work will be assessed by the subject 5. Observe any five surfaces at home:
teacher and the Visiting Examiner appointed locally
and approved by the Council.
• Which surface produces more friction and
which produces less friction (on the basis of
All candidates will be required to have completed two type of material, surface finish,
projects from any topic/s covered in theory. dryness/wetness). Discuss giving reasons.
Mark allocation for each project (10 marks) *: • Frictional force opposes relative motion
Criteria Marks (impending or actual) between two surfaces in
1. Title of the Project and 1 contact. Discuss. Also, show graphically the
Introduction relation between force applied F and force of
2. Content 3 static friction fs, / force of kinetic friction fk for
3. Presentation and originality 2 any pair of surfaces in contact.
4. Conclusion/Comments/Summary 1 • A block of wood is given a push which slides
5. Viva-Voce (Visiting Examiner) 3 along a horizontal, flat table surface, coming
TOTAL 10 to a stop. Discuss what happens to the
momentum of the block?
• A ball rolls without slipping on a perfectly flat
plane of infinite extent. Will it roll forever?
Discuss.
• Discuss advantages and disadvantages of
friction in daily life.

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6. Observe ten articles at home (five simple machines 8. Observe a transformer installed in your locality
and five articles in which a combination of and draw its labelled diagram. Discuss the
machines is being used) such as plier, scissors, principle on which it works and the reasons for
knife, cycle/motorcycle, ramp, steering wheel, energy losses. Find out the transmission and
roller of the cord for blinds, juicer/mixer/blender, distribution mode of electrical energy from a
etc. For each of the articles selected: power plant to a consumer. Discuss its pros and
• Identify the type of machine/s used. cons.
• Draw simple diagrams for each item selected 9. Assemble a household circuit comprising three
and mark the load, effort and fulcrum. Write bulbs, three on/off switches, a fuse, and a power
expressions for mechanical advantage, source from the given materials (Three bulbs
velocity ratio and efficiency. (6V,1W) each, main switch of a power supply
• Discuss briefly the utility of each type of (battery eliminator), three switches, fuse (0.6A),
machine used. connecting wires with red and black plastic
7. Study electricity bills of your home issued by the coating, fuse wire, a plier and a cutter).
electricity department from January to December.
Draw a circuit diagram of the actual layout and
Prepare a month wise analysis of units of
write the theory and procedure involved.
electricity consumed and bill paid in a tabular
form. Represent the same graphically. Suggest NOTE: No question paper for Project work will
some ways in which you can economise electricity be set by the Council.
consumption at home.

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SAMPLE TABLE FOR PROJECT WORK
S. Unique PROJECT 1 PROJECT 2 TOTAL
No. Identification MARKS
Number A B C D E F G H I J
(Unique ID)
of the Teacher Visiting Average Viva-Voce Total Teacher Visiting Average Viva-Voce Total Marks (E + J)
candidate Examiner Marks by Marks Examiner Marks by (H + I)
(A + B ÷ Visiting (C + (F + G ÷ Visiting
2) Examiner D) 2) Examiner
7 Marks 7 Marks 7 Marks 3 Marks 10 7 Marks 7 Marks 7 Marks 3 Marks 10 Marks 20 Marks
Marks
1

2

3

4

5

6

7

8

9

10

*For breakup of the 7 Marks to be awarded separately by the Teacher and the Visiting Examiner, please refer to the table giving the criteria for mark
allocation for each project.
NOTE: VIVA-VOCE (3 Marks) for each Project is to be conducted only by the Visiting Examiner and should be based on the Project only.

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