CATEGORY NO. 461/2010

**SYLLABUS**

**Study of I C Engines**

Different types of
I.C.Engines. Different Systems in I.C. Engines, Engine components- Crankshaft,
Piston, Connecting Rod, Flywheel, Engine Block etc. Fuel System: Air Fuel Ratio
for different engine speeds in S.I. Engine AC – Mechanical Pump, Carburetion,
Functions of Carburettor, Working – Solex Carburettor, S.V. Carburettor. Fuel
System in Diesel Engine – Fuel Filters, Working of BOSCH pump. Injector and injection
nozzle. Electronic fuel injection, working of coil ignition and magnetic ignition
in S.I.Engine, Electronic Ignition System, Cooling System, Classification of
cooling system, radiators, thermostat, temperature indicators, water pump,
I.C.Engine Lubrication, properties of lubricants, splash system, forced system,
Governing, Quantity governing, quality governing. Hit and miss governing,
Emission from automobiles, Pollution from S.I.Engines, Pollution from C.I.
Engines. Emission standards Euro II & III. Pollution control techniques.
Noise Pollution, Noise reduction techniques. S.I. Engines Gasoline injection
system (MPFI), Common Rail Direct Injection (CRDI) in C.I. Engines.

**2 Automobile Running Gear**

Various components in
transmission. Requirement for a good transmission system. Principle of friction
clutches. Constructional features and working of single plate dry friction
clutch; Diaphragm clutch, Cone clutch, Centrifugal clutch, Semi Centrifugal
clutch, Vacuum clutch, Hydraulic clutch, Electromagnetic Clutch, Multiple
clutch (Dry & Wet) Fluid flywheel, Clutch Disc – Constructional details and
functions of each part. Clutch operating mechanism, Necessity and functions of
gearbox. Gearbox construction and working of sliding mesh gearbox, constant
mesh gearbox, Epicyclical gearbox. Torque converter. Gear selector and shifting
mechanism. 2 wheeler transmission - Gear Drive, Chain Drive, V-matic transmission.
C.V.T., Propeller shaft and Universal Joint, Torque tube drive, Hotchkiss
drive. Variable velocity joints, Constant velocity joints, Front wheel 2drive,
Differential mechanism, Locking differential, Limited slip differential, Rear
Axles – types, Stub axles, wheel mountings, Types of live rear axles, semi floating,
three quarter floating and full floating axles. Suspension. Leaf springs, Spring
shackles, Independent suspension, air suspension, Steering mechanism, steering
wheel, steering column, steering gears. Worm and sector, Rack and Pinion,
recirculating ball, power steering, centre point steering, steering geometry,Camber,
Caster, King Pin, inclination, Toe in and out. Types of wheels, Spoke wheel,
Disc wheels, Cast wheels, Size of wheel, Wheel balancing, Tubeless and Tubed
type tyres, Parts of tyre, Carcass bead, tread, side walls, Ply rating, Bias,
Radial tyre material, tread pattern, Inflation pressure, tyre wear. Brakes –
hydraulic, pneumatic, Mechanical, dual brake system, Master cylinder, wheel
cylinder, leading and trailing brakes, Brake shoes, lining, Drum materials, Bleeding
of brakes, antilocking brake system.

**3 Fluid Mechanics and Machinery**

Importance of
hydraulics, Density, specific weight, specific volume, specific gravity,
viscosity, kinetic viscosity, Newton’s law of viscosity, Types of fluids,
compressibility, surface tension, capillarity, fluid pressure and its measurement,
fluid pressure at a point, , pressure head, Pascal’s Law, absolute, gauge,
atmospheric and vacuum pressures, measurement of fluid pressure, Piezo

meter tube, simple manometer, differential manometer,
inverted differential manometer, Bourdon’s tube pressure gauge, problems, total
pressure, total pressure on immersed surface-horizontal, vertical, inclined,
Kinematics of fluid flow, types of fluid flow, steady and unsteady flow,
uniform and non-uniform flow, Laminar and turbulent flow, compressible and
incompressible flow, rate of flow or discharge, equation of continuity of a
liquid flow, Energy of a liquid in motion, potential energy, kinetic energy,
pressure energy, total energy, total head of liquid in motion, Bernoulli’s
equation, practical applications of Bernoulli’s equation, venturimeter,
orifices, types of orifices, vena contracts, co-efficient of contraction,
co-efficient of velocity , co-efficient of discharge, notches, types of notches,
rectangular notches, triangular notches, trapezoidal notch, discharge over notches,
flow through pipes, loss of head in pipes, majority energy losses, loss of energy
due to friction, Darcy’s formulae for loss of head in pipes, Chezys formulae
for loss of head in pipes. Centrifugal pump – working, priming, cavitations, efficiencies,
discharge, power required to drive multi stage pumps, reciprocating pump –
Types, comparison of centrifugal and reciprocating pump. Discharge, slip, power
required, air vessels, Gear pumps, screw pumps, vane pumps, Lobe pumps, simple
piston pumps, Hydraulic and Pneumatic system, Basic elements of hydraulic
system, Flow control valves – types, gate, globe, butterfly valves, Non return
valve – Application, Circuits of control valves, functions, classifications.
Describe the 3 working of pressure control valves, types, sliding spool type.
Check valves, 1 way, 2 way, 3 way directional control valves. Solenoid control
valve, Comparison of pneumatic system with hydraulic system. Identification of
standard pneumatic symbols, Basic pneumatic system, air filter, pressure
regulator, lubricator, mugglers, air cylinders, types, light, medium, heavy,
tandem, duplex, double end types.

**4 Thermodynamics**

Thermodynamic system,
thermodynamic properties, boundary state, processes, internal energy, flow of
work, heat, enthalpy, first and second law of thermodynamics. Specific heat at
constant volume and at constant pressure. Establish the relationship between
specific heat and gas constant. Derivation of formulae for work, heat, change
in internal energy, relation between pressure, volume and temperature during
constant volume. Constant pressure, constant temperature, adiabatic and
polytropic processes. Power developed in IC engines, Indicator diagram and
measurement of mean effective pressure. Engine indicators, indicated power,
brake power, friction power, indicated thermal efficiency, volumetric
efficiency, specific fuel consumption, Morse text and preparation of heat
balance sheet. Air compressor, use of compressed air, classification of air
compressors – working of single stage and multi stage air compressors - Inter
cooler. Principles of heat transfer – Modes of heat transfer and field of
application of heat transfer, Thermal conduction, Fourier’s law of thermal
conduction, thermal conductivity, condition through plain wall, composite plain
wall - simple problems. Thermal radiation, reflection, absorption and
transmission of radiation. Absorptivity, reflectivity and transmitivity.
Concept of black body, concept of grey. Free convection, and forced convection.
Basic principles and heat exchanger. Evaporator and condenser.

**5 Strength of Materials**

(i) Direct stresses
and strain

Types of stresses and
strain – Tensile and Compressive – Longitudinal and Lateral strain, Poisson’s
ratio – behavior of mild steel under tension, Stress – strain diagram, Limit of
proportionality – elastic limits – yield points – Ultimate stress – Working
stress – factor of safety – comparison of stress strain, diagram of mild steel
and a brittle material - Hook’s Law and Youngi modulus – Principles of super
position – Stresses in varying sections – Stresses in composite section- Simple
problems.

(ii) Shear stress and
sheer strain 4

Shear stress and
strain – modulus of rigidity – volumetric strain, bulk modulus.

(iii) Thermal stress
and strain

Natural and magnitude
of stress due to change in temperature –total or partial prevention of
expansion and contraction – temperature stresses on composite bar.

(iv) Friction :
Introduction, types of friction, static friction, dynamic friction, sliding
friction, rolling friction, pivot friction, limiting friction, angle of friction,
co-efficient of friction, cone of friction, state laws of friction, Static friction
and kinetic friction. Force analysis of a sliding body resting on a horizontal
plane – Force acting along plane and at an angle.

(v) Centre of gravity
of sections

Centroids – centre of
gravity – axis of symmetry and axis of reference, methods to find centre of
gravity, simple geometric sections as a rectangle, triangle, circle and
semicircle sections, combinations of symmetrical sections such as T, I and
channel sections, combinations of unsymmetrical sections such as L section –
plane section with cut out holes.

(vi) Moments of inertia of sections:

Moments of inertia – radius of gyrations – methods to find
moments of inertia – moments of inertia of rectangular and circular sections by
integration method. Parallel axis theorem – Moments of inertia of standard
geometric sections such as T, I, L and channel sections.

**6 Production process of Components**

Measuring instruments
– classification, direct reading, indirect reading, Precision, non precision
instruments – Micrometer, Vernier Micrometer, gauges, screw gauges,
comparators, sine bar, vernier height gauges, sine bar, slip gauges. Foundry –
Pattern making and materials, Classification of patterns and pattern allowances
– Types of moulding and moulding operations – Green sand moulding, dry sand
moulding, Plaster moulding, Shell moulding. Cast iron – types, methods of
manufacture, casting methods, sand casting, permanent mould casting, 5centrifugal
casting, special casting, die casting – Steels – different process of steel making,
open hearth process, Bessemer process, L-D process, Forging operations, Open
hearth, closed hearth furnaces – Cold working process – Cold working, basic cold
working operations like drawing, squeezing, bending shearing cutting and blanking,
extruding, shot Peening. Hot working, rolling drawing, extruding. Welding – arc
welding, principles of arc welding, welding machines and uses of arc welding,
submerged arc welding, thermit welding, safety in welding, Gas welding, oxy
acetylene welding, resistance welding, classification of resistance welding,
TIG and MIG welding, soldering and brazing explanation and application of
soldering and brazing advantages and limitations. Machine tools – Lathe – types, Engine and tool
room lathe, Lathe parts and functions. Cylindrical turning, taper calculations,
measurements, taper turning methods. Tail stock set over and swiveling the tool
post. Thread cutting basics. Other operations on lathe, drilling, boring, reaming,
key way cutting, knurling. N.C. and C.N.C. machines, advantages of CNC systems
over conventional systems. Drilling machines. Bench type, parts of a drilling
machines. Shaping machines. Use of a shaper – shaper component and their functions.
Quick return motion – crank and slotted lever – slotting machines. Uses of a
slotter, slotter parts. Grinding – Grinding machines – uses and types, Grinding
wheels – type – milling machine – use of milling machine – types of milling
machine – principle, parts, different milling operations. Fundamentals of Gear
manufacturing methods – Indexing methods – Gear milling, Gear hobbing.

**7 Electrical and Electronics Engineering**

Alternating current –
production of alternating voltages, Mathematical representation. Explanation of
cycle, period, frequency, RMS value, average value, maximum value, Form factor,
vector representation of alternating quantities – Phase differences –
Inductance and capacitance, Impedance, Current calculations in general RLC
series circuit. Calculations of power factor inductance – capacitance – AC
three resistance – 3 phase circuits, Star and Delta connections – Voltage and
current relations. Expression for power transformers. Principles of operation
of a single phase transformer, 3 phase transformer, Auto transformer.
Principle, advantages and uses of welding transformer. Electronic circuits - Logic circuits, Instrument
Amplifier, Band width, Oscillator, Condition of Oscillator, Fundamentals of
Digital Electronics, Logic Gates, AND, OR, NOT, XOR. Boolean Algebra,
simplification of expressions, De-Morgans Theorem, K-Map, Universal Gates,
NAND, NOR Electronic instruments – CRO, CRT, Digital Multimeter. 6

**8 Engineering Materials**

Properties of
Materials – Impact, Strength, fatigue, Creep resistance, Malleability,
toughness etc. Mechanism of grain formation. Effect of rate of cooling on grain
size. Effect of grain size on mechanical properties – Factors promoting fine
grain.

Heat treatment of
metals. Need for heat treatment. Description of different processes and their
applications. Annealing, tempering, hardening, case hardening. Normalizing and
nitriding. Alloy steels. Need for alloying elements. Effect of alloying on
properties. Stainless steel - different types, specific properties, uses of
types of steels. Non ferrous metals and alloys. Commercial specification and
uses of alloys of copper, aluminium. Non metallic materials – Characteristics
of plastic fibre glass and synthetic polymers.

**9 Mathematics**

Co-ordinate Geometry:-

Straight line – slope,
equation of a straight line in the forms

i) y = mx + c

ii) y – y1 = m (x –
x1)

iii) y – y1 = x – x1

y1 – y2 x1 – x2

iv) x + y = 1

a b

Point of intersection
of 2 lines. Angle between 2 lines. Condition for 2

lines to be parallel and perpendicular.

Methods of
differentiation

Definition of
derivative of xn

, Sin x, Cos x etc. by using first principle.

Find derivative of x and log x. Fundamental formulae. Product
and quotient

number. Derivatives of other trigonometric functions. Simple
problems. 7

Integration

Definition of
integration, Fundamental problems. Integral of product of 2

functions, Formulae, Simple problems. Applications of
integration. Finding

areas between the curve y = f (x) and axes. Volume of Solid,
problems.

Differential equation

Solution of equation
of the forms variable separable Linear equation.

**NOTE:**- It may be noted that apart from the main topics listed above, questions from other topics prescribed for the educational qualification of the post may also appear in the question paper. There is no undertaking that all the topics above may be covered in the question paper.

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