RRB JE Automobile Engineering Syllabus

The RRB JE Automobile Engineering discipline section tests knowledge of automobile engineering at the Diploma and Degree level across vehicle systems, IC engines, transmission, chassis, braking, fuel systems, and automotive electronics. It carries 100 questions and 100 marks in CBT 2. Automobile posts in Indian Railways relate to the maintenance and repair of railway road vehicles, service vehicles, inspection cars, breakdown cranes, and other motor transport equipment used by the railway organisation.

Quick Facts: JE Automobile Engineering

Detailed Automobile Engineering Syllabus

1. Internal Combustion (IC) Engines

•        Engine Classification: 2-stroke and 4-stroke; petrol and diesel; naturally aspirated and turbocharged; DOHC and SOHC; air-cooled and water-cooled

•        Engine Construction: cylinder block; cylinder head; crankshaft; connecting rod; piston; piston rings; gudgeon pin; camshaft; valves and valve train; flywheel; engine bearings

•        Engine Working Cycles: ideal Otto cycle; ideal Diesel cycle; ideal Dual cycle; actual indicator diagram; thermal efficiency; volumetric efficiency; mechanical efficiency; mean effective pressure

•        Engine Performance Parameters: IMEP; BMEP; IHP; BHP; FHP; BSFC; ISFC; torque; power curves; heat balance

•        Engine Testing: dynamometer types; motoring and firing tests; Morse test; indicated power by pressure measurement; heat balance test; Orsat analysis

•        Valve Timing: valve timing diagram for 4-stroke petrol and diesel engines; valve overlap; effect of valve timing on performance

•        Engine Cooling System: necessity; water cooling (radiator, thermostat, water pump, coolant, overflow tank); air cooling; coolant selection; pressure cap

•        Engine Lubrication System: necessity; types (splash, pressure, combined); types of lubricants (SAE grades, multigrade oils); oil pump; oil filter; oil cooler; sump

•        Engine Materials: cylinder block (cast iron, aluminium alloys); piston materials; piston rings; bearing materials; valve materials; sealing materials

•        Super-charging and Turbocharging: purpose; types of superchargers; turbocharger (components, wastegate, intercooler); effect on engine performance; turbo lag

2. Fuel Systems

•        Petrol Fuel System: fuel tank; fuel pump; fuel filter; carburettor (types: single choke, multi-choke; float circuit; main metering circuit; power circuit; accelerator pump); MPFI system; GDI system

•        Diesel Fuel System: fuel tank; lift pump; fuel filter; injection pump (inline, rotary DPA, VE type); injectors (types; spray patterns; needle lift pressure); CAV pump; unit injector; CRDI (common rail direct injection) -- rail pressure, pressure regulator, solenoid injectors, ECU control

•        Alternative Fuels: CNG; LPG; hydrogen; biodiesel; ethanol; natural gas; blended fuels; dual fuel systems; advantages and disadvantages

•        Emission Control: sources of HC, CO, NOx, PM; catalytic converter (three-way, diesel oxidation catalyst, DPF); EGR; SCR with AdBlue; evaporative emission control (EVAP); Bharat Stage VI (BS6) norms; OBD-II diagnostics

3. Power Transmission Systems

•        Clutch: function; single plate clutch (components, working); multi-plate clutch; cone clutch; centrifugal clutch; diaphragm spring clutch; hydraulic clutch; electromagnetic clutch; clutch troubles and diagnosis

•        Gearbox: necessity; sliding mesh; constant mesh; synchromesh gearbox; epicyclic gearbox; automatic transmission (torque converter, planetary gear set, hydraulic control, electronic control); CVT (belt-driven, toroidal); AMT; DCT

•        Propeller Shaft and Universal Joints: necessity; construction; Hooke joint (single and double); constant velocity (CV) joints; slip joint; propeller shaft balancing

•        Final Drive and Differential: purpose; types of final drive (bevel gear, hypoid, worm gear); differential working; limited-slip differential (LSD); differential lock; axle types (semi-floating, three-quarter floating, fully floating)

•        Transfer Case and 4WD Systems: purpose; part-time and full-time 4WD; AWD; low range and high range; electronic 4WD systems

•        Fluid Couplings and Torque Converters: working principle; slip; torque multiplication; stall speed; lock-up clutch

4. Chassis, Suspension and Steering

•        Chassis and Frame: types of frames (ladder, backbone, perimeter, space frame, monocoque/unibody); frame materials; chassis loading

•        Front Axle and Steering Geometry: types of front axles (dead, live); camber; caster; king-pin inclination (KPI); toe-in and toe-out; Ackermann principle; steering offset; wheel alignment procedure

•        Steering Systems: manual steering (rack and pinion, recirculating ball); power steering (hydraulic, electrohydraulic, EPS); tilt and telescopic steering column; variable ratio steering; steer-by-wire

•        Suspension Systems: necessity; types of springs (leaf spring, coil spring, torsion bar, air spring); types of shock absorbers (telescopic, twin tube, monotube); front suspension (wishbone, MacPherson strut, double wishbone, multi-link); rear suspension (rigid axle with leaf spring, independent rear suspension)

•        Tyres and Wheels: tyre construction (bias ply, radial ply); tyre ratings (width, aspect ratio, rim diameter, speed rating, load index); tyre pressure; tyre rotation; wheel balancing; wheel alignment; tyre wear patterns

5. Braking Systems

•        Hydraulic Brake System: working principle; master cylinder (single and tandem); wheel cylinder; brake fluid types (DOT ratings); brake lines and hoses

•        Drum Brakes: construction; leading and trailing shoes; self-energising effect; duo-servo brakes; wheel cylinder; brake adjustment

•        Disc Brakes: construction; caliper types (sliding, floating, fixed); ventilated and solid disc; brake pads; brake balance

•        Power Brakes: vacuum servo (booster); hydraulic booster; electrohydraulic booster

•        Anti-lock Braking System (ABS): necessity; components (wheel speed sensor, ECU, HCU); ABS cycle (pressure build, hold, reduce); EBD; BA; electronic brake force distribution

•        Parking and Emergency Brakes: types; drum-in-hat; electric parking brake (EPB)

•        Air Brake System: components (compressor, reservoir, brake valve, brake chamber, slack adjuster); single and dual circuit; application to heavy vehicles and railway service vehicles

6. Automotive Electrical and Electronics

•        Automotive Electrical Basics: 12V and 24V systems; conventional and negative earth; wiring harness; connectors; fuses and relays; circuit protection

•        Battery: lead-acid battery (construction, working, charging, testing, maintenance); AGM; lithium-ion; battery rating (CCA, RC); jump-starting

•        Starting System: starter motor (construction, types -- induction reduction, planetary gear); starter relay; neutral safety switch; starting circuit diagnosis

•        Charging System: alternator (construction, rectifier, regulator); charging circuit; IC voltage regulator; alternator testing; belt tension

•        Ignition System: conventional contact point; electronic ignition (HEI); distributorless ignition (DIS); coil-on-plug (COP); spark plug types, gaps, heat range; ignition timing and advance

•        Lighting System: headlight types (halogen, HID xenon, LED, laser); headlight adjustment; indicator circuits; horn; wiper motor and washer; rear defogger

•        Automotive Electronics and ECU: sensors (MAP, MAF, TPS, O2, coolant temperature, knock, crankshaft position, camshaft position); actuators; ECU functions; CAN bus; LIN bus; OBD-II codes

•        Advanced Driver Assistance Systems (ADAS): adaptive cruise control; lane keeping assist; AEB; blind spot monitoring; parking sensors; 360-degree camera; radar and LIDAR basics

•        Electric and Hybrid Vehicles: BEV; HEV; PHEV; FCEV; battery management system (BMS); regenerative braking; power electronics in EV (inverter, DC-DC converter, on-board charger); charging standards (AC level 1/2, DC fast charging, CCS, CHAdeMO)

7. Automotive Maintenance, Diagnostics and Workshop Practice

•        Preventive Maintenance: service intervals; oil change; filter replacement; tune-up; fluid level checks; belt and hose inspection

•        Diagnostic Tools: OBD-II scanner; multimeter; oscilloscope; pressure gauges; vacuum pump; smoke machine; alignment machine

•        Engine Diagnostics: compression test; cylinder leakage test; vacuum gauge test; oil pressure test; identifying and correcting common faults

•        Electrical Diagnostics: reading wiring diagrams; voltage drop test; resistance measurement; continuity test; tracing open, short, and high resistance faults

•        Workshop Safety: PPE; fire safety; lifting safety (hydraulic jacks and jack stands); chemical handling (brake fluid, coolant, battery acid, oil); MSDS sheets

•        Special Tools: engine hoist; valve spring compressor; bearing puller; torque wrench; timing light; dwell meter; exhaust gas analyser

•        Periodic Inspection and Certification: PUC test; fitness certificate; emission testing (smoke meter, CO-HC analyser); roadworthiness standards

8. Automotive Metrology and Materials

•        Measurement Tools: vernier caliper; micrometer (outside, inside, depth); dial gauge; bore gauge; feeler gauge; radius gauge; surface roughness measurement

•        Engineering Materials: cast iron (grey, white, malleable, SG); carbon steel; alloy steel (Cr-Mo, Ni-Cr); aluminium alloys; copper alloys; rubber; plastics; composites; gasket materials

•        Heat Treatment: annealing; normalising; hardening; tempering; case hardening (carburising, nitriding, induction hardening); effect on properties

Physics and Chemistry (15 Questions -- Class 12 / Diploma Level)

This section tests applied science knowledge at Class 12 and engineering diploma level. Key topics include:

•        Physics: Units and Measurement; Scalars and Vectors; Kinematics; Laws of Motion; Work, Energy and Power; Circular Motion; Gravitation; Properties of Matter (Elasticity, Viscosity, Surface Tension); Thermodynamics and Heat Transfer; Wave Motion and Sound; Electrostatics (Coulomb's Law, Electric Field, Potential); Current Electricity (Ohm's Law, Kirchhoff's Laws, Wheatstone Bridge); Magnetic Effects of Current; Electromagnetic Induction (Faraday's Law, Lenz's Law); Optics (Laws of Reflection and Refraction, Lenses, Mirrors, Optical Instruments); Modern Physics (Photoelectric Effect, Radioactivity, Nuclear Reactions)

•        Chemistry: Atomic Structure and Periodic Table; Chemical Bonding (Ionic, Covalent, Metallic); States of Matter and Gas Laws; Chemical Equilibrium and Le Chatelier's Principle; Acids, Bases, Salts and pH; Electrochemistry (Electrolysis, Galvanic Cells, Faraday's Laws); Thermochemistry; Chemical Kinetics; Corrosion and Prevention; Polymers (Natural and Synthetic); Fuels and Combustion; Environmental Chemistry

Basics of Computer Applications (10 Questions)

•        Computer Organisation: CPU, memory types (RAM, ROM, Cache), storage devices, input-output devices

•        Operating Systems: functions, types (Windows, Linux, Unix), file systems, process management

•        MS Office: Word (document formatting, tables, mail merge), Excel (formulae, charts, functions), PowerPoint (slide design, transitions)

•        Internet and Networking: types of networks (LAN, WAN, MAN), protocols (TCP/IP, HTTP, FTP, SMTP), IP addressing, DNS, cloud computing basics

•        Database Fundamentals: concept of database, RDBMS, SQL basics (SELECT, INSERT, UPDATE, DELETE), keys and relationships

•        Programming Concepts: flowcharts and algorithms, pseudocode, basic C language concepts (data types, control structures, functions, arrays)

•        Cybersecurity Basics: common threats (virus, malware, phishing), firewall, antivirus, data encryption basics

•        Digital Logic: binary, octal, hexadecimal number systems; logic gates (AND, OR, NOT, NAND, NOR, XOR); Boolean algebra basics

Environment and Pollution Control (10 Questions)

•        Environment: ecosystem components (biotic and abiotic), food chains and food webs, biogeochemical cycles (carbon, nitrogen, water)

•        Air Pollution: pollutants (SOx, NOx, CO, PM2.5, PM10, VOCs), sources, health effects, standards and control measures; vehicular emission norms (BS VI)

•        Water Pollution: sources, pollutants, effects on aquatic life and human health; treatment methods (primary, secondary, tertiary); BOD, COD, DO concepts

•        Soil Pollution: sources, effects, remediation techniques; land degradation and restoration

•        Noise Pollution: sources, health effects, standards (WHO and CPCB), control measures

•        Solid Waste Management: types of waste, 3R principle (Reduce, Reuse, Recycle), composting, sanitary landfill, incineration

•        Radioactive Waste: types of radiation, health effects, AERB regulations, storage and disposal

•        Environmental Legislation: Environment Protection Act 1986; Air (Prevention and Control of Pollution) Act 1981; Water (Prevention and Control of Pollution) Act 1974; National Green Tribunal (NGT); Environmental Impact Assessment (EIA)

•        Indian Railways and Environment: ISO 14001 certification in railways, green initiatives, bio-toilets, solar energy on railways, plastic-free stations

•        Climate Change: greenhouse gases, global warming, Kyoto Protocol, Paris Agreement, India's NDC commitments