RESERVE SUB INSPECTOR TRAINEE /
ARMED POLICE SUB INSPECTOR TRAINEE
(MOTOR TRANSPORT UNIT)
POLICE
(CATEGORY NO. 461/2010)
1 Study of I C Engines
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 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.
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.
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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