RESERVE SUB INSPECTOR TRAINEE / ARMED POLICE SUB INSPECTOR TRAINEE

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RESERVE SUB INSPECTOR TRAINEE / 
ARMED POLICE SUB INSPECTOR TRAINEE 
(MOTOR TRANSPORT UNIT) 
POLICE 
(CATEGORY NO. 461/2010) 
1 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, 
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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 drive, 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 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. 


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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
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.


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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, centrifugal 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.


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

NOTE: - It may be noted that apart from the topics detailed 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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ARMED POLICE SUB INSPECTOR TRAINEE

RESERVE SUB INSPECTOR TRAINEE

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