RRB JE Syllabus 2026 – CBT 1 and CBT 2 Complete Breakdown with Department-wise Technical Topics
RRB JE is a two-stage CBT exam — and the two stages are very different from each other in what they test. CBT 1 is a general engineering aptitude screen: Maths, Reasoning, General Science, and General Awareness. Most engineering graduates can clear CBT 1 with 4–8 weeks of focused preparation. CBT 2 is where the real differentiation happens — it has 100 marks of technical ability questions specific to your engineering discipline (Civil, Electrical, Mechanical, Signal & Telecom, Computer Science/IT, Electronics). How well you know your undergraduate engineering subjects determines your CBT 2 score and ultimately your rank.
This article gives you the complete topic list for both stages, department-wise technical breakdowns, the negative marking rules, and an honest strategy note on which sections to prioritise.
RRB JE Exam Pattern 2026 – Both Stages at a Glance
| Parameter | CBT 1 (Stage I) | CBT 2 (Stage II) |
|---|---|---|
| Purpose | Qualifying / Screening stage | Main ranking stage |
| Total Questions | 100 | 150 |
| Total Marks | 100 | 150 |
| Duration | 90 minutes | 120 minutes |
| Negative Marking | 1/3 mark deducted per wrong answer | 1/3 mark deducted per wrong answer |
| Medium | English and Hindi (and regional languages) | English and Hindi (and regional languages) |
| Question Type | MCQ — 4 options, 1 correct | MCQ — 4 options, 1 correct |
| After CBT 2 | — | Document Verification + Medical Examination |
Important: Unlike CTET which has no negative marking, RRB JE deducts 1/3 mark for every wrong answer in both CBT 1 and CBT 2. This changes the strategy fundamentally — do not guess randomly. For any question where you can eliminate at least two options (leaving a 50-50 choice), attempting is mathematically beneficial. For questions where you have no idea, leave them blank.
CBT 1 Syllabus – Section-wise Breakdown
| Section | Questions | Marks | Key Topics |
|---|---|---|---|
| Mathematics | 30 | 30 | Number system, BODMAS, decimals, fractions, LCM/HCF, ratio, percentage, mensuration, time & work, speed & distance, simple & compound interest, algebra basics, geometry, trigonometry basics, statistics |
| General Intelligence and Reasoning | 25 | 25 | Analogies, series completion, coding-decoding, syllogism, Venn diagrams, data sufficiency, blood relations, directions, classification, puzzles, non-verbal reasoning (mirror/water images, embedded figures) |
| General Awareness | 15 | 15 | Current affairs (last 6 months), Indian geography, history, polity, economy, sports, science & technology news, Railway news and developments |
| General Science | 30 | 30 | Physics: mechanics, heat, light, sound, electricity, magnetism. Chemistry: matter, metals/non-metals, acids/bases/salts, reactions, basic organic chemistry. Life Sciences: cell, plants, animals, human body, diseases, nutrition |
Mathematics (30 marks) – What to Focus On
RRB JE Maths in CBT 1 covers Class 10–12 level topics, not engineering mathematics. The difficulty level is moderate — this is not JEE-level algebra or calculus. Candidates from science stream who have cleared 12th comfortably should not find CBT 1 Maths challenging. The topics to pay extra attention to:
- Percentage and Ratio: 4–6 questions guaranteed. Practice data interpretation sets where these concepts appear together.
- Time, Work, Speed and Distance: Classic formula-based questions — consistently tested. 3–5 questions.
- Mensuration: Areas and volumes of 2D and 3D shapes. 3–4 questions — these require knowing the correct formulae and being quick with calculations.
- Number System: HCF, LCM, divisibility, unit digit, remainders — 2–4 questions.
- Algebra and Trigonometry Basics: Identity-based simplifications, basic sin/cos/tan values. 3–4 questions.
General Science (30 marks) – The Most Important CBT 1 Section
General Science has the highest marks in CBT 1 (30 out of 100). It tests Physics, Chemistry, and Life Sciences at approximately Class 9–10 NCERT level. Do not ignore this section — many engineering graduates, ironically, do worse in General Science than in Maths because they have not revised basic science concepts since Class 10.
Physics topics (approx 10–12 marks):
- Newton's laws, friction, work-energy-power, momentum
- Heat: temperature scales, thermal expansion, specific heat, latent heat
- Light: reflection, refraction, lenses and mirrors, human eye
- Sound: types of waves, speed of sound, echo, ultrasound, Doppler effect basics
- Electricity and Magnetism: Ohm's law, series/parallel circuits, electromagnetic induction basics
- Modern physics basics: atomic structure, radioactivity concepts (not calculations)
Chemistry topics (approx 8–10 marks):
- States of matter, physical and chemical changes
- Metals, non-metals, and metalloids — properties and uses
- Acids, bases, salts — pH, neutralisation, everyday examples
- Chemical reactions — types, balancing (conceptual)
- Basic organic chemistry — hydrocarbons, alcohols, common compounds and their uses
- Periodic table basics — groups, trends, important element properties
Life Sciences topics (approx 8–10 marks):
- Cell — structure, organelles, types, cell division basics
- Plant biology — photosynthesis, respiration, reproduction in plants
- Animal biology — digestion, respiration, excretion, nervous system
- Human body — major organ systems and their functions
- Diseases — bacterial, viral, deficiency diseases; vaccination basics
- Nutrition and vitamins
General Intelligence and Reasoning (25 marks)
Reasoning in RRB JE CBT 1 is similar to other Railway exams (RRB NTPC, RRB Group D) in difficulty. The question types are standard and predictable:
- Coding-Decoding: 2–3 questions — recognise the pattern and apply
- Analogy and Series: Both alphabetic and numeric — 4–5 questions
- Blood Relations: 2–3 questions — draw family tree to avoid errors
- Directions and Distances: 1–2 questions — always draw the path
- Syllogism: 2–3 questions — use Venn diagrams
- Non-verbal Reasoning: Paper folding, mirror image, embedded figures — 3–4 questions
General Awareness (15 marks)
Only 15 marks but should not be completely ignored — these are often the "free marks" for candidates who follow current affairs. Focus on the last 6 months of news (national and international), Static GK (Indian history, polity, geography basics), and importantly, Railway-related news — Indian Railways budget developments, new train launches, record speed achievements, Railway zones and headquarters are regular sources of GA questions in Railway exams.
CBT 2 Syllabus – Sections and Technical Ability Topics
| Section | Questions | Marks | Notes |
|---|---|---|---|
| General Awareness | 15 | 15 | Same as CBT 1 GA — current affairs and static GK |
| Physics and Chemistry | 15 | 15 | More focused than CBT 1 — Class 11–12 level in some parts |
| Basics of Computers and Applications | 10 | 10 | Hardware, software, OS basics, internet, networking fundamentals, MS Office basics |
| Basics of Environment and Pollution Control | 10 | 10 | Environmental science: ecology, pollution types, control measures, environmental acts |
| Technical Ability (trade-specific) | 100 | 100 | Your engineering discipline — see detailed breakdown below |
Technical Ability – Civil Engineering (100 marks)
- Engineering Drawing: Projection of lines, planes, and solids; isometric projection; sectional views; development of surfaces
- Building Materials: Types of stones, bricks, cement, concrete, steel, timber — properties and uses in construction
- Surveying: Chain surveying, compass surveying, levelling, theodolite, Total Station basics, contour maps
- Soil Mechanics: Soil classification, index properties, permeability, consolidation, shear strength basics
- Hydraulics and Fluid Mechanics: Properties of fluids, Bernoulli's theorem, flow in pipes, open channel flow, hydraulic machines basics
- Irrigation Engineering: Irrigation methods, canals (design basics), dams (types), spillways, reservoirs
- RCC Design: Working stress method basics, design of beams, slabs, columns — principles (not advanced calculations)
- Steel Structures: Types of steel sections, design principles of beams and connections
- Transportation Engineering: Highway design basics, pavement types, traffic engineering fundamentals, Railways track geometry basics
- Environmental Engineering: Water supply, sewage treatment, solid waste management
Technical Ability – Electrical Engineering (100 marks)
- Basic Electrical Concepts: Ohm's law, Kirchhoff's laws, network theorems (Thevenin, Norton, Superposition), mesh and nodal analysis
- AC Fundamentals: RLC circuits, phasors, resonance, power factor, three-phase circuits, power calculations
- Electrical Machines: Transformers (construction, principles, tests, efficiency), DC machines (types, characteristics, speed control), Induction motors (construction, torque-speed curve, starting methods), Synchronous machines basics
- Power Systems: Power generation basics (thermal, hydro, nuclear), transmission lines, distribution systems, load flow basics, protection (fuses, circuit breakers, relays)
- Control Systems: Block diagrams, transfer functions, stability analysis (Routh-Hurwitz, Bode plots basics), PID control
- Electronics Fundamentals: Semiconductors, diodes, transistors (BJT, FET), amplifiers, oscillators, op-amps basics
- Electrical Measurements: Measurement of V, I, R, P, energy; instruments (moving coil, moving iron, dynamometer); CTs and PTs
Technical Ability – Mechanical Engineering (100 marks)
- Engineering Mechanics: Statics (equilibrium, trusses, frames), dynamics (kinematics, kinetics), friction, moment of inertia
- Strength of Materials: Stress-strain, bending moment and shear force diagrams, bending stress, torsion, deflection of beams, columns and struts
- Theory of Machines: Mechanisms, velocity and acceleration analysis, gears, flywheels, governors, balancing
- Fluid Mechanics: Fluid statics, Bernoulli's theorem, flow measurement, boundary layer basics, turbomachinery
- Thermodynamics: Laws of thermodynamics, thermodynamic cycles (Carnot, Rankine, Otto, Diesel), steam tables, refrigeration basics
- Manufacturing Processes: Casting, forming, welding, machining (turning, drilling, milling), metrology basics
- Machine Design: Design considerations, factor of safety, riveted and welded joints, keys, couplings, springs, bearings
- Industrial Engineering: PERT/CPM, inventory control basics, quality control (SPC basics), material handling
Technical Ability – Computer Science / IT (100 marks)
- Data Structures: Arrays, linked lists, stacks, queues, trees (BST, AVL, B-tree), graphs, hashing — operations and time complexity
- DBMS: Relational model, SQL (joins, aggregation, subqueries), normalisation (1NF to BCNF), transactions (ACID properties), indexing
- Operating Systems: Process management, scheduling algorithms, memory management (paging, segmentation), file systems, deadlock
- Computer Networks: OSI and TCP/IP model, IP addressing and subnetting, routing protocols, TCP/UDP, HTTP/HTTPS, DNS, network security basics
- Software Engineering: SDLC models (waterfall, agile), testing types, software design principles, UML diagrams basics
- Programming: C/C++ basics (pointers, structures, file I/O), Java basics (OOP concepts, exception handling), algorithm analysis (Big-O notation)
- Digital Electronics: Number systems (binary, octal, hex), logic gates, Boolean algebra, Karnaugh maps, flip-flops, counters, registers
Technical Ability – Electronics Engineering (100 marks)
- Analog Electronics: Diodes, BJT and MOSFET (biasing, amplifiers, frequency response), operational amplifiers (ideal op-amp, circuits, applications)
- Digital Electronics: Logic gates, Boolean algebra, combinational circuits (adder, multiplexer, decoder), sequential circuits (flip-flops, counters, registers, finite state machines)
- Signals and Systems: Fourier series and transform, Laplace transform, Z-transform, sampling theorem, convolution
- Control Systems: Transfer functions, time response, frequency response, stability (Nyquist, Bode), root locus
- Communication Systems: AM and FM modulation, demodulation, PCM, digital modulation (ASK, FSK, PSK), noise in communication
- Microprocessors and Microcontrollers: 8085/8086 architecture and instruction set basics, interfacing, interrupts, 8051 microcontroller basics
- Electromagnetic Theory: Maxwell's equations, wave propagation, transmission lines, antennas basics
Computers and Environment – CBT 2 Non-Technical Sections
The two non-technical sections in CBT 2 (Computers: 10 marks, Environment: 10 marks) are often underrated by candidates who focus entirely on Technical Ability. These 20 marks are among the easiest to secure in the entire exam — a few days of focused preparation is enough.
Computers and Applications (10 marks) — key topics: Computer hardware components (CPU, RAM, ROM, storage devices), software types (system software, application software), operating system functions, internet basics (browser, email, IP address, protocols), networking fundamentals (LAN, WAN, router, switch), cybersecurity basics, MS Office productivity tools.
Environment and Pollution Control (10 marks) — key topics: Types of pollution (air, water, soil, noise, radioactive), causes and effects of each, control measures, greenhouse effect and global warming, ozone layer depletion, Environmental Protection Act, Wildlife Protection Act, Biodiversity basics, solid waste management, sustainable development.
Preparation Strategy – CBT 1 vs CBT 2
| Stage | Preparation Time Required | Key Differentiator | Target Score |
|---|---|---|---|
| CBT 1 | 6–10 weeks for most engineering graduates | General Science (30 marks) is the high-value section. Reasoning is predictable and scorable. Maths needs formula practice. | 70–80 / 100 (cut-off varies by category and zone) |
| CBT 2 Technical | 12–20 weeks minimum (depends on how much engineering is still fresh) | 100 marks of technical — revise your core engineering subjects from undergraduate level. Prioritise 5–6 core subjects over 10 average ones. | 90–120 / 150 for good ranking |
The honest truth about CBT 2: if you are more than 3–4 years past your engineering graduation, a large portion of your technical knowledge will have faded significantly. Plan 3–4 months minimum for serious CBT 2 technical revision. Focus on the 5–6 highest-weightage subjects in your trade (for Civil: Surveying, Soil Mechanics, Hydraulics, Transportation, RCC. For Electrical: Machines, Power Systems, Basic Concepts. For Mechanical: SOM, Thermodynamics, FM, Theory of Machines).
Frequently Asked Questions
What is the negative marking in RRB JE 2026?
Both CBT 1 and CBT 2 carry a negative marking penalty of 1/3 mark per wrong answer. If you answer 80 questions and get 60 right and 20 wrong, your score is 60 − (20 × 1/3) = 60 − 6.67 = 53.33. This makes random guessing a negative expected value strategy. The rule of thumb: attempt a question if you can eliminate at least 2 out of 4 options (making it a 50-50 guess or better). Leave blank if you have no idea.
How many questions are in RRB JE CBT 2 Technical Ability?
Technical Ability in CBT 2 has 100 questions worth 100 marks — it is the largest and most important section, accounting for 2/3 of the total CBT 2 marks. The remaining 50 marks come from GA (15), Physics and Chemistry (15), Computers (10), and Environment (10). A candidate who scores well in Technical Ability can compensate for average scores in the other sections. Conversely, poor technical knowledge cannot be compensated by scoring high in the smaller sections.
Can I change my technical discipline between CBT 1 and CBT 2?
No. You declare your technical discipline (Civil, Electrical, Mechanical, Signal & Telecom, Computer Science, Electronics, etc.) at the time of application. CBT 2 Technical Ability questions are set for your declared discipline. There is no option to switch disciplines after the application is submitted. Make sure you choose the discipline that matches your diploma or degree — applying in the wrong discipline invalidates your candidature.
What books are best for RRB JE CBT 1 preparation?
For Maths: R.S. Agarwal's Quantitative Aptitude or Rakesh Yadav's Maths. For Reasoning: R.S. Agarwal's A Modern Approach to Verbal and Non-Verbal Reasoning. For General Science: NCERT Class 9 and 10 Science textbooks (cover all three subjects — Physics, Chemistry, Biology). For General Awareness: Any current affairs monthly magazine plus standard GK books. For CBT 2 Technical Ability: Your undergraduate engineering textbooks remain the primary source — supplemented by MADE Easy or ACE Engineering Academy's trade-specific RRB JE preparation books.
Is RRB JE CBT 1 score used for final merit?
No. CBT 1 is only a screening exam — it determines which candidates are called for CBT 2. CBT 1 scores are not added to the final merit. The final selection rank is based entirely on CBT 2 performance. This means a candidate who just barely clears CBT 1 cut-off has the same opportunity as a top scorer in CBT 1 — what matters is how well they perform in CBT 2 Technical Ability. Clear CBT 1 efficiently (do not over-invest time) and save your preparation energy for CBT 2.
