RRB JE Syllabus & Exam Pattern 2026

Updated: 09 Sep 2026

Every topic matched to the official PDF Official notice, rrb.indianrailways.gov.in

138 topics, each explained 12 units

Official syllabus PDF rrb.indianrailways.gov.in

RRB JE is the Railway Recruitment Boards' examination for Junior Engineer posts across the Indian Railways — Electrical, Engineering (Civil), Mechanical and S&T departments — at Level 6 of the 7th CPC pay matrix, with an initial pay of ₹35,400. This page is built from CEN No. 04/2026, the detailed notice published on the RRB websites on 13.08.2026, which advertises Junior Engineer and Depot Material Superintendent posts; its Corrigendum-1 of 18.08.2026 added Chemical & Metallurgical Assistant and restated the total as 4029 vacancies. Selection is two computer-based tests, then document verification and a medical examination. The one thing worth fixing in your head before you plan a single week: CBT-1 is screening only — the notice says its normalised score is used ONLY to shortlist candidates for CBT-2 — and it is CBT-2 that carries the technical paper your job actually rests on.

Exam Pattern

Stage	Section	Questions	Marks
CBT-1 (screening)	Mathematics	30	30
CBT-1 (screening)	General Intelligence & Reasoning	25	25
CBT-1 (screening)	General Awareness	15	15
CBT-1 (screening)	General Science	30	30
CBT-1 (screening)	Total — 90 minutes (120 minutes for candidates eligible for a scribe); 1/3 mark deducted for a wrong answer	100	100
CBT-2	General Awareness	15	15
CBT-2	Physics & Chemistry	15	15
CBT-2	Basics of Computers and Applications	10	10
CBT-2	Basics of Environment and Pollution Control	10	10
CBT-2	Technical Abilities — your Exam Group only	100	100
CBT-2	Total — 120 minutes (160 minutes for candidates eligible for a scribe); 1/3 mark deducted for a wrong answer	150	150

This page is built from CEN No. 04/2026 and its Corrigendum-1. A new CEN can change the pattern, the syllabus and the age limits, so read this as the structure of THIS notice, and check the next one when it comes. Four things in it decide how you should study. (1) Negative marking is 1/3 of a mark in BOTH stages, so a blind guess costs you — the notice states it separately for CBT-1 and CBT-2. (2) The section-wise split is described in the notice as indicative: it says there may be some variation in the actual paper, so do not leave a section untouched because it 'only' carries 10 marks. (3) You choose your Exam Group at application time through the discipline your qualification is mapped to, and 100 of CBT-2's 150 marks are that one group's technical paper. (4) A virtual calculator is provided on screen in CBT-2 — the notice promises one for no other stage, and it separately bars candidates from carrying a calculator into the examination — so practise CBT-1's arithmetic without one. Dates for the CBTs, document verification and the medical examination are not in the notice — it says they will be told to candidates through the RRB websites.

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Full Syllabus

1 CBT-1 — Mathematics (30 questions, 30 marks) 30 Q

The largest single section of CBT-1 along with General Science, and the one that decides whether you finish the paper. Para 13.1 (a) lists the topics below as what the questions are likely to cover.

What the syllabus lists	What it means and how to prepare
Number systems	Types of numbers, divisibility rules, remainders and factors. Everything else in this section stands on it, so it is the one topic worth finishing first.
BODMAS	The order in which a mixed expression must be simplified. Two marks a year are lost here not from ignorance but from hurry — practise long expressions with a timer.
Decimals	Conversion between decimals and fractions, and arithmetic on them. In a 90-minute paper the gain is in choosing the faster of the two forms before you start.
Fractions	Comparing, simplifying and operating on fractions. Comparison without full calculation — cross-multiplying rather than finding a common denominator — is the skill being tested.
LCM and HCF	Least common multiple and highest common factor, and the word problems built on them — bells ringing together, tiles fitting a floor, the largest exact measure.
Ratio and Proportion	Dividing a quantity in a given ratio, and the direct and inverse proportion behind partnership and mixture sums. It reappears inside time-and-work and time-and-distance, so time spent here is paid back twice.
Percentages	Percentage increase and decrease, successive change, and reading a percentage as a fraction. Learning the common fraction equivalents by heart is the single biggest speed gain in this section.
Mensuration	Area, perimeter, surface area and volume of plane and solid figures. A diploma holder already uses these on site; the exam only asks for them faster and without a calculator.
Time and Work	How long a job takes when people or pipes work together or leave midway. Solve by taking the total work as the LCM of the given days rather than as 1 — it removes fractions completely.
Time and Distance	Speed, relative speed, trains crossing platforms and poles, boats and streams. Railway papers lean on the train cases, so drill the crossing formulas until they need no derivation.
Simple and Compound Interest	Interest on a principal, and the difference between the two systems over two and three years. The difference formula for two years is worth memorising — it turns a long sum into one line.
Profit and Loss	Cost price, selling price, marked price, discount and successive discounts. Almost every question here is a percentage question wearing a shop's clothes.
Algebra	Simplification, identities, linear and quadratic equations. Recognising an identity instead of expanding it is what separates a 40-second answer from a four-minute one.
Geometry	Lines, angles, triangles, circles and their properties. Draw every figure before you look at the options; most errors here are errors of reading, not of geometry.
Trigonometry	Ratios, standard angles, identities and simple height-and-distance problems. The standard-angle table has to be automatic — it appears inside other topics as well.
Elementary Statistics	Mean, median, mode and simple data handling. Small in the syllabus and small in effort — this is one of the cheapest sets of marks in the paper.
Square Root	Finding square roots and using them inside larger expressions. Knowing squares up to 30 and cubes up to 15 by heart is what makes this instant.
Age Calculations	Present, past and future ages given in ratios or differences. Write one variable for the present age and let every other line be built from it — two variables is where this goes wrong.
Calendar & Clock	Odd days, day of the week for a given date, and the angle between the hands of a clock. Two small formulas cover most of what is asked.
Pipes & Cistern	Filling and emptying a tank, which is time-and-work with a sign change for the outlet pipe. The CEN names it separately, so treat it as its own practice set.

2 CBT-1 — General Intelligence & Reasoning (25 questions, 25 marks) 25 Q

Para 13.1 (b). These marks need no syllabus knowledge at all, only practice, which makes them the cheapest 25 marks in the whole recruitment — and the ones engineering candidates most often leave until last.

What the syllabus lists	What it means and how to prepare
Analogies	Two items are related in some way and you find the pair related the same way. Say the relationship out loud in words before you read the options — that one habit removes most wrong answers.
Alphabetical and Number Series	Finding the rule behind a sequence and extending it. Check differences first, then ratios, then position in the alphabet — a fixed order of checks beats staring.
Coding and Decoding	A word or number is written in a made-up code and you work out the rule. Write the alphabet with positions once on the rough sheet at the start; you will use it all paper.
Mathematical operations	Symbols standing in for +, -, × and ÷, then a normal calculation. Substitute the real signs on paper before solving instead of holding the swap in your head.
Relationships	Blood-relation chains — who is whose what. Draw a family tree with a symbol for gender; the questions that look hardest collapse the moment the tree exists.
Syllogism	Whether a conclusion follows from given statements. Use Venn diagrams and accept only what must be true in every diagram you can draw, not what seems reasonable.
Jumbling	Letters, words or sentences given out of order, to be arranged. In word arrangement the reliable route is alphabetical or logical sequence, not the sound of the sentence.
Venn Diagram	Reading overlapping groups and answering how many fall in each region. Fill the innermost region first and work outwards, or the counts double up.
Data Interpretation and Sufficiency	Reading tables and graphs, and judging whether the given data is even enough to answer. In sufficiency questions you are not asked to solve — resist finishing the calculation.
Conclusions and Decision Making	Choosing what follows from a passage, or what a person should do under given rules. Answer from the rules printed in the question, never from what you would do.
Similarities and Differences	What a set of items shares and what breaks the pattern — usually an odd-one-out. Name the shared property in words before choosing; checking one property at a time is faster than scanning the whole set.
Analytical reasoning	Seating arrangements, puzzles and ordering problems. Draw the arrangement instead of holding it in your head — almost every mistake here is a memory mistake.
Classification	Grouping items by a shared property, or spotting the one that does not belong. Related to similarities and differences, and best practised in the same sitting.
Directions	Tracking movement and turns to find the final position or bearing. Fix north at the top of your rough sheet and never rotate the page.
Statement – Arguments and Assumptions	Whether an argument is strong, or whether an assumption is implicit in a statement. An assumption is what the statement takes for granted, not what it proves — that one distinction carries most of the marks.

3 CBT-1 — General Science (30 questions, 30 marks) 30 Q

Para 13.1 (d) sets the level explicitly: Physics, Chemistry and Life Sciences up to the 10th standard CBSE syllabus. The ceiling is the useful part of that sentence — a class-10 science book is the right book here, not a diploma one.

What the syllabus lists	What it means and how to prepare
Physics (up to 10th Standard CBSE syllabus)	Motion, force, work and energy, light, sound, electricity and magnetism at class-10 level. The CEN caps the depth at 10th standard, so a diploma-level textbook here is wasted effort.
Chemistry (up to 10th Standard CBSE syllabus)	Matter, atoms and molecules, acids, bases and salts, metals and non-metals, and carbon compounds at class-10 level.
Life Sciences (up to 10th Standard CBSE syllabus)	Cells, tissues, human body systems, nutrition and heredity at class-10 level. Worth noticing: the CEN includes life sciences in CBT-1 but not in CBT-2's Physics & Chemistry section, so these 30 marks are the only place it is asked.

4 General Awareness — 15 marks in CBT-1 and 15 marks in CBT-2

The CEN prints the same eight-item list twice, word for word: at Para 13.1 (c) for CBT-1 and at Para 13.2 (a) for CBT-2. It is one unit here because it is one syllabus — read once, it answers 30 marks across the two papers.

What the syllabus lists	What it means and how to prepare
Knowledge of Current affairs	What has happened recently in India and the world. Read one newspaper daily and keep a single running page of notes — the questions reward steady reading, not a last-week rush.
Indian geography	Physical and economic geography of India — rivers, ranges, crops, minerals, and the railway map that sits on top of them. Learn it from a map rather than from a list.
culture and history of India including freedom struggle	Ancient, medieval and modern India, with the freedom struggle named separately by the CEN. Fix the sequence of events first; dates attach themselves to a sequence you already know.
Indian Polity and constitution	The Constitution, Parliament, the judiciary, and how the Union and the states divide their work. The most repeated ground is fundamental rights, duties and the directive principles.
Indian Economy	Budget, banking, inflation, planning and the major schemes. Understand what each term means before memorising figures — the questions test the term far more often than the number.
Environmental issues concerning India and the World	Climate change, pollution, conservation and the international agreements around them. It overlaps directly with CBT-2's environment section, so one round of study serves both papers.
Sports	Recent tournaments, winners and the major awards. A short revision sheet updated once a month is enough; this is not a topic that rewards depth.
General Scientific and technological developments	Space missions, defence systems, new technology and health science in the news. For a railway paper, pay particular attention to developments the Railways themselves announce.

5 CBT-2 — Physics & Chemistry (15 questions, 15 marks) 15 Q

Para 13.2 (b), and it is one line long in the notice: up to 10th standard CBSE syllabus. Notice what is missing beside CBT-1's list — life sciences is not part of this section.

What the syllabus lists	What it means and how to prepare
Physics — up to 10th standard CBSE syllabus	The same class-10 physics as CBT-1, asked again in CBT-2 for 15 marks. One round of preparation serves both papers; there is no separate, deeper CBT-2 physics syllabus.
Chemistry — up to 10th standard CBSE syllabus	Class-10 chemistry, again capped by the CEN at that level. Note that CBT-2 pairs physics with chemistry only — life sciences is not part of this section.

6 CBT-2 — Basics of Computers and Applications (10 questions, 10 marks) 10 Q

Para 13.2 (c). Ten small, factual marks with a named and finite list — for most candidates this is the highest return per hour anywhere in CBT-2.

What the syllabus lists	What it means and how to prepare
Architecture of Computers	How a computer is put together — processor, memory, buses and the path an instruction takes. Definitions are enough at this level; the CEN asks for basics, not design.
Input and Output devices	Keyboard, mouse, scanner, printer, monitor and which side each belongs to. The one question that repeats is a device that does both, such as a touch screen.
Storage devices	Primary and secondary storage, magnetic, optical and solid-state media, and their units. Learn the size ladder from bit to terabyte in order.
Networking	Types of networks, topologies and the common devices — hub, switch, router. Enough to answer definition questions; the CEN does not go into protocols here.
Operating System like Windows, Unix, Linux	What an operating system does, and the three families the CEN names by name. Know what each is used for rather than the version history.
MS Office	Word, Excel and PowerPoint — common menus, shortcuts and file extensions. Questions here are practical, so half an hour of actually using the software beats reading about it.
Various data representation	Binary, octal, decimal and hexadecimal, and conversion between them. This is the one topic in the section that needs pen-and-paper practice rather than reading.
Internet and Email	How the internet is accessed, what an email address is made of, and the common terms around both. Straightforward marks if the vocabulary is clear.
Websites & Web Browsers	What a website, a URL and a browser are, and how they relate. Also the difference between a search engine and a browser, which is the question most often got wrong.
Computer Virus	Types of malicious software, how they spread and how they are prevented. Named separately by the CEN, so expect at least one question from it.

7 CBT-2 — Basics of Environment and Pollution Control (10 questions, 10 marks) 10 Q

Para 13.2 (d). Another short, closed list, and it overlaps with the environment item in General Awareness — so one set of notes earns marks in three places.

What the syllabus lists	What it means and how to prepare
Basics of Environment	Ecosystems, biodiversity and the natural cycles that keep them running. Short and definitional — finish it in one sitting.
Adverse effect of environmental pollution and control strategies	What pollution does to health, agriculture and materials, and the standard ways of controlling it. Learn cause, effect and remedy as one triple for each pollutant.
Air, water and Noise pollution, their effect and control	The three pollution types named separately by the CEN, with their sources, effects and control equipment. For a railway job the noise section is more than an exam topic.
Waste Management	Solid, liquid and hazardous waste, and how each is collected, treated and disposed of. Segregation at source is the idea most questions circle around.
Global warming	The greenhouse effect, the gases that drive it, and its consequences. Keep the difference between global warming and climate change clear.
Acid rain	How sulphur and nitrogen oxides turn rain acidic, and what that does to soil, water and buildings. One clean cause-and-effect chain, easy to hold.
Ozone depletion	The ozone layer, the substances that damage it and the effect on living things. Do not mix it up with global warming — they are different problems with different causes.

8 CBT-2 Technical Abilities — Civil & Allied Engineering Exam Group (100 questions, 100 marks) 100 Q

Annexure-VIII (A). Your group only — a candidate is tested in the one Exam Group their qualification is mapped to by Para 13.3. Civil Engineering, a combination of its sub-streams, and a three-year B.Sc. in Civil Engineering come here. Two thirds of CBT-2's marks sit in this one annexure.

What the syllabus lists	What it means and how to prepare
Engineering Mechanics	Force and its resolution, moment of a force, force systems and composition of forces, then equilibrium, friction, centroid and centre of gravity, and simple machines. It is the first numbered subject for a reason — the analysis subjects later in the list assume it.
Building Construction	Building components — substructure and superstructure — and the types of structure: load bearing, framed and composite. Short, definitional, and the vocabulary the rest of the paper uses.
Building materials	Masonry materials — stones, bricks and mortars — with timber and the miscellaneous materials the notice names: glass, plastic, fibre, aluminium, steel, galvanised iron, bitumen, PVC, CPVC and PPF. Property-and-use questions, so tabulate rather than read.
Construction of substructure	Job layout, earthwork and foundations — their types, dewatering, coffer dams and bearing capacity. Bearing capacity returns later under geotechnical engineering, so link the two.
Construction of superstructure	Stone, brick, hollow concrete block and composite masonry, cavity walls, doors and windows, vertical communication — stairs, lifts and escalators — and scaffolding and shoring.
Building finishes	Floors and their laying process, walls through plastering, pointing and painting, and roofs including RCC roofing materials.
Building maintenance	Cracks — their causes, types and repair by grouting, guniting and epoxy — settlement with its causes and remedies, and re-baring techniques. Practical ground that a site diploma already half covers.
Building drawing	Conventions of lines and symbols, planning principles for residential and public buildings with the rules and byelaws, the drawings themselves — plan, elevation, section, site plan, location plan, foundation plan and working drawing — and perspective drawing.
Concrete Technology	Properties of cement grades and of coarse and fine aggregates; concrete properties including the water-cement ratio and fresh versus hardened behaviour; mix design, testing, and quality control through batching, formwork, transportation, placing, compaction, curing and waterproofing; extreme-weather concreting, chemical admixtures, and special concretes — ready mix, RCC, pre-stressed, fibre reinforced, precast and high performance. One of the heaviest entries in this annexure.
Surveying	Types of survey; chain and cross-staff survey with ranging, triangulation, chaining, errors and area; compass survey with bearings, the prismatic compass, traversing and local attraction; levelling with the dumpy level, the level book, temporary adjustment, reduction methods, tilting and auto levels and sources of error; contouring, area and volume measurement, plane table and theodolite survey, tacheometry, curves, advanced equipment, aerial survey and remote sensing. The longest single entry the CEN prints for this group.
Computer Aided Design	CAD software — the notice names AutoCAD, Auto Civil and 3D Max — CAD commands, and generating a plan, elevation, section, site plan, area statement and 3D view.
Geo Technical Engineering	Where geotechnical work is applied — foundations, pavements, earth-retaining structures and earthen dams — then physical properties of soil, permeability and seepage analysis, shear strength, bearing capacity, compaction and stabilisation, and site investigation and sub-soil exploration.
Hydraulics	Fluid properties, hydrostatic pressure and its measurement in pipes, fundamentals of fluid flow, flow through pipes and open channels, flow-measuring devices and hydraulic machines.
Irrigation Engineering	Hydrology, investigation and reservoir planning, percolation tanks and diversion head works. A short entry — do not let its four words hide that it is a full topic.
Mechanics of Structures	Stress and strain, shear force and bending moment, moment of inertia, stresses in beams, analysis of trusses and strain energy.
Theory of structures	Direct and bending stresses, slope and deflection, fixed and continuous beams, the moment distribution method, and columns. It follows straight on from the previous entry, so study the two together.
Design of Concrete Structures	Working stress and limit state methods; analysis and design of singly and doubly reinforced sections; shear, bond and development length; and the design of T-beams, slabs, axially loaded columns and footings.
Design of Steel Structures	Types of sections, grades of steel and strength characteristics, the IS Code, connections, and the design of tension and compression members, steel roof trusses, beams and column bases.
Transportation Engineering	Railway engineering — alignment and gauges, permanent way, track geometrics, branching of tracks, stations and yards, and track maintenance; bridge engineering — site selection, investigation, component parts, permanent and temporary bridges, inspection and maintenance; and tunnel engineering — classification, shapes and sizes, investigation and surveying, tunnelling methods in various strata, precautions, equipment, explosives, lining and ventilation. For a railway post this is the entry closest to the job itself.
Highway Engineering	Road engineering and investigation for a road project, geometric design of highways, construction of road pavements and their materials, traffic engineering, hill roads, drainage of roads, and maintenance and repair.
Environmental Engineering	Environmental pollution and control, public water supply, domestic sewage, solid waste management, environmental sanitation and plumbing. It overlaps with CBT-2's own environment section, so one round of notes serves both.
Advanced Construction Techniques and Equipment	Fibres and plastics, artificial timber, advanced concreting — underwater, ready mix, tremix and special concretes — formwork, pre-fabricated construction and soil reinforcing; then the plant: hoisting and conveying equipment, earth-moving machinery, concrete mixers, stone crushers, pile drivers, hot-mix bitumen plant, bitumen pavers and floor polishing machines.
Estimating and Costing	Types of estimate — approximate and detailed — modes of measurement and rate analysis. Small in the syllabus, large in the actual job of a Junior Engineer.
Contracts and Accounts	Types of engineering contract, tenders and tender documents, payment and specifications. The last numbered entry in this annexure and the one most often left unread.

9 CBT-2 Technical Abilities — Electrical & Allied Engineering Exam Group (100 questions, 100 marks) 100 Q

Annexure-VIII (B). Electrical Engineering and combinations of its sub-streams are mapped here by Para 13.3. Eleven numbered subjects, of which Electrical Machines alone is the size of three.

What the syllabus lists	What it means and how to prepare
Basic concepts	Resistance, inductance and capacitance and the factors that affect each, then current, voltage, power and energy with their units. Units are worth a careful hour — a wrong unit is a wrong answer even when the method was right.
Circuit law	Kirchhoff's laws and simple circuit solutions using network theorems. Practise until you pick the right theorem in seconds; choosing the wrong one is what makes these questions long.
Magnetic Circuit	Flux, magnetomotive force and reluctance; kinds of magnetic material; magnetic calculations for straight, circular and solenoidal conductors; and electromagnetic induction with self and mutual inductance.
AC Fundamentals	Instantaneous, peak, RMS and average values of an alternating wave; representation of a sinusoidal waveform; series and parallel circuits of R, L and C; resonance and the tank circuit; the polyphase system with star and delta connection and three-phase power; and the DC and sinusoidal response of R-L and R-C circuits.
Measurement and measuring instruments	Measuring single- and three-phase power, active and reactive, and energy; the two-wattmeter method; frequency and phase angle; ammeters and voltmeters of moving-coil and moving-iron type; range extension, multimeters, meggers, energy meters and AC bridges; the use of a CRO, signal generator, CT and PT; and earth-fault detection.
Electrical Machines	DC machines — construction, principles of motors and generators, characteristics, speed control, starting, braking, losses and efficiency; single- and three-phase transformers with equivalent circuit, voltage regulation, open- and short-circuit tests, losses, parallel operation and auto transformers; and three-phase induction motors with the rotating magnetic field, equivalent circuit, torque-speed characteristics, starting, speed control and braking, plus fractional-kilowatt and single-phase induction motors. The single largest entry in this group.
Synchronous Machines	Generation of three-phase EMF, armature reaction, voltage regulation, parallel operation of two alternators and synchronising, control of active and reactive power, and the starting and applications of synchronous motors.
Generation, Transmission and Distribution	Types of power station, load, diversity and demand factors, cost of generation and interconnection; power factor improvement, tariffs, types of fault and short-circuit current for symmetrical faults; switchgear and protection — circuit-breaker ratings, arc extinction in oil and air, HRC fuses, earth-leakage and overcurrent protection, Buchholz relay, Merz-Price protection, feeder and busbar protection and lightning arresters; and cables with their rating and derating factors.
Estimation and costing	Estimating a lighting scheme and the electrical installation of machines, the relevant IE rules, and earthing practice. Short, and directly the work of a Junior Engineer.
Utilization of Electrical Energy	Illumination, electric heating, electric welding, electroplating, and electric drives and motors.
Basic Electronics	Working of PN junction diodes and NPN and PNP transistors, BJT and JFET, and simple circuits built from them. The bridge between this group and the Electronics group — the CEN keeps it at 'basic'.

10 CBT-2 Technical Abilities — Electronics & Allied Engineering Exam Group (100 questions, 100 marks) 100 Q

Annexure-VIII (C). Para 13.3 maps a wider set of disciplines here than anywhere else: Electronics, Instrumentation and Control, Communication, Computer Science and Engineering, Computer Engineering, Computer Science and Information Technology. If your diploma is in computers or IT, this is your group.

What the syllabus lists	What it means and how to prepare
Electronic Components & Materials	Conductors, semiconductors and insulators; magnetic materials; jointing and cleaning materials for underground copper cable and optical fibre cable; chargeable and non-chargeable cells and batteries; and relays, switches, MCBs and connectors.
Electronic Devices and circuits	PN junction diodes and thyristors; diode and triode circuits; junction transistors; amplifiers; oscillators; multivibrators and counters; rectifiers; and inverters and UPS.
Digital Electronics	Number systems and binary codes, Boolean algebra and logic gates, combinational and sequential logic circuits, analogue-to-digital and digital-to-analogue converters, counters and memories. High-yield ground, because the questions are short and definite.
Linear Integrated Circuit	The operational amplifier and its linear and non-linear applications, voltage regulators, timers and the phase-locked loop.
Microprocessor and Microcontroller	Introduction to the microprocessor, the working of the 8085, assembly language programming, peripherals and other microprocessors, and microcontrollers. The CEN names the 8085 specifically, so study that one in detail.
Electronic Measurements	Measuring systems and the basic principles of measurement, range extension methods, the cathode ray oscilloscope, LCD and LED panels, and transducers.
Communication Engineering	Introduction to communication, modulation and multiplexing techniques, wave propagation, transmission line characteristics and optical fibre cable, and the fundamentals of public address systems, electronic exchanges, radar, and cellular and satellite communication. Directly relevant to the S&T telecommunication posts in this CEN.
Data communication and Network	Introduction to data communication, hardware and interfaces, networks and networking devices, local and wide area networks, and internetworking.
Computer Programming	Programming concepts, the fundamentals of C and C++, operators, control statements, functions, arrays, strings and pointers, file structure, and data structures and DBMS.
Basic Electrical Engg.	DC circuits, AC fundamentals, the magnetic, thermal and chemical effects of electric current, and earthing — installation, maintenance and testing.

11 CBT-2 Technical Abilities — Mechanical & Allied Engineering Exam Group (100 questions, 100 marks) 100 Q

Annexure-VIII (D). Mechanical, Production, Automobile, Manufacturing, Mechatronics, Industrial, Machining, Tools and Machining, and Tools and Die Making Engineering are mapped here by Para 13.3, along with combinations of their sub-streams.

What the syllabus lists	What it means and how to prepare
Engineering Mechanics	Resolution of forces, equilibrium and the equilibrant, the parallelogram, triangle and polygon laws and Lami's theorem, couples and moments, and the condition of equilibrium for a rigid body under coplanar non-concurrent forces; friction, static and dynamic, with the limiting angle of friction and the angle of repose, and forces on horizontal and inclined planes; moment of inertia and radius of gyration for I, channel, T, L, Z and built-up sections; and Newton's laws, projectile motion, D'Alembert's principle and the conservation of energy and momentum.
Material Science	Mechanical properties of engineering materials — tensile and compressive strength, ductility, malleability, hardness, toughness, brittleness, impact strength, fatigue and creep resistance; the classification of steels, mild steel and alloy steels; and heat treatment — annealing, normalising, hardening, tempering, carburising, nitriding and cyaniding.
Strength of Materials	Stress and strain and the stress-strain diagram, factor of safety, thermal stresses, strain energy, proof resilience and modulus of resilience; shear force and bending moment diagrams for cantilever, simply supported, continuous and fixed beams; and torsion in shafts and springs and thin cylindrical shells.
Machining	The working principle of the lathe, types of lathe with the engine lathe's construction and specification, the nomenclature and geometry of a single-point cutting tool with tool signature and the function of each angle; general and special operations — turning, facing, taper turning, thread cutting, knurling, forming, drilling, boring, reaming and keyway cutting — cutting fluids, coolants and lubricants; and an introduction to the shaper, slotter, planer, broaching and milling, gear manufacture and the heat treatment applied to gears.
Welding	Classification of welding processes with their advantages and limits; the principles and equipment of arc welding and the choice of electrode for different metals; oxy-acetylene gas welding and its equipment; arc and gas welding procedures; soldering and brazing with types of solder and flux; flame cutting processes; welding defects, testing and inspection; and modern methods — submerged, CO2, atomic-hydrogen and ultrasonic welding, with MIG and TIG.
Grinding & Finishing Process	Metal removal by grinding, natural and artificial abrasives, bonds and binding processes including vitrified, silicate, shellac and rubber; classification and construction of cylindrical, surface and tool-and-cutter grinding machines, centreless grinding and its limits, work-holding devices, wheel maintenance and balancing, and coolants; then finishing by honing, lapping and superfinishing, electroplating and hot dipping, galvanising, tin coating, parkerising, anodising and metal spraying, and organic coatings.
Metrology	Linear measurement with slip gauges and dial indicators; angle measurement with the bevel protractor, sine bar and angle slip gauges; mechanical, electrical, optical and pneumatic comparators; surface roughness measurement by comparison, tracer instruments and interferometry; and collimators, the measuring microscope and inspection by shadow and profile projection.
Fluid Mechanics & Hydraulic Machinery	Properties of a fluid — density, specific weight, specific gravity, viscosity, surface tension, compressibility and capillarity — Pascal's law, pressure measurement and buoyancy; Reynolds number, the energy of a liquid and the laws of conservation of mass, energy and momentum, velocity and discharge, Bernoulli's equation and its assumptions, venturi meters, the pitot tube and current meters; and the working and construction of the centrifugal pump with its four efficiencies, cavitation, and jet and submersible pumps.
Industrial Management	Job analysis, motivation and its theories, satisfaction and performance-reward systems, production planning and control with routing, scheduling and dispatching, and PERT and CPM; then materials — inventory control models, ABC analysis, safety stock, reorder level, economic order quantity and break-even analysis, stores layout, equipment and records, purchasing procedure, bin card and Kardex, and material handling by hoist, crane, conveyor and fork truck.
Thermal Engineering	The laws of thermodynamics and the conversion of heat into work and back, the laws of perfect gases, and thermodynamic processes — isochoric, isobaric, isothermal, hyperbolic, isentropic, polytropic and throttling; modes of heat transfer with thermal conductivity, the convective coefficient, the Stefan-Boltzmann law and the overall heat transfer coefficient; air-standard cycles — Carnot, Otto and Diesel — the construction, working, systems and performance of internal combustion engines with the petrol-versus-diesel comparison; and air compressors, refrigeration cycles and the principle of a refrigeration plant.

12 CBT-2 Technical Abilities — CMA Exam Group (100 questions, 100 marks) — not for engineering candidates 100 Q

Annexure-VIII (E), added by Corrigendum-1 of 18.08.2026 together with the Chemical & Metallurgical Assistant post. Read the label before you read the list: the corrigendum's own mapping table admits only a B.Sc. degree in Physics and Chemistry into this Exam Group, and it bars DMS candidates from choosing it. If you hold an engineering diploma this is not your paper — it is here because the CEN prints it, not because you should study it.

What the syllabus lists	What it means and how to prepare
Measurements, Units and Dimensions	Units and dimensions, the types of error in a measurement, and why accuracy matters. The opening entry of this annexure and the vocabulary the rest of it uses.
Light	Reflection and refraction with the laws of reflection, total internal reflection, interference, diffraction and polarisation, the magnification formulas for the microscope and telescope, and the electromagnetic spectrum.
Heat	Heat as energy and its sources and transmission, expansion of solids, liquids and gases, temperature and its scales, calorimetry, specific and latent heat, the anomalous expansion of water, and combustion and calorific value.
Sound	Sources and propagation of sound, its velocity in different media, its characteristics, reflection and echo, resonance, sonar and the Doppler effect.
Mechanics	Scalars and vectors, all types of motion, friction, Newton's laws and momentum, the equations of motion under gravity and projectiles, laws of flotation, work, power and energy with conservation, centre of mass and gravity, stability and equilibrium, gravitation with the relation between g and G, circular motion and Kepler's laws, and elasticity with Hooke's law.
Magnetism	Magnetic field, uniform and non-uniform fields, magnetic induction and lines of force, pole strength and magnetic moment, the inverse square law, and the magnetic properties of materials and their classification.
Electricity & Electro Magnetism	Charge, field, intensity and potential; simple circuits, conductors and insulators, Coulomb's law, cells, Ohm's law and its limits, resistances in series and parallel, EMF and specific resistance, Kirchhoff's laws, electric power and Joule's law; Ampere's law, the circular loop and the solenoid, force on a moving charge, Fleming's left-hand rule and the electric motor; and electromagnetic induction with Faraday's and Lenz's laws, generators, alternating current, self and mutual inductance and the transformer.
Modern Physics	Discharge through gases, cathode and anode rays, X-rays, the Thomson, Rutherford and Bohr atomic models, the nucleus and mass defect, radioactivity with alpha, beta and gamma radiation and their uses, half life, isotopes, isobars and isotones, artificial radioactivity and radio isotopes, radioactive series, and chain and controlled nuclear reactions with fission and fusion.
Electronics and Communications	Semiconductors, the diode and the p-n junction, pnp and npn transistor characteristics and uses, the Zener diode, simple electronic circuits, logic gates and their applications, and modulation and demodulation.
Matter	States of matter, elements, compounds and mixtures and the methods of separating them, chromatography, the behaviour and measurable properties of gases and the gas laws, the mole concept, and the laws of Dalton, Avogadro and Berzelius.
Chemical Reactions	Physical and chemical change, types of reaction, the physical and chemical properties of various compounds, chemical calculations, and the preparation and uses of sodium hydroxide, bleaching powder, baking soda, washing soda and plaster of Paris.
Acids and Bases, Salts	Strength and uses of acids and bases, neutralisation, salts and water of crystallisation, complex, neutral and double salts, oxidation and reduction and rancidity, natural and chemical indicators, the pH scale and its role in agriculture and medicine, solutions with solubility, ionisation and concentration, the oxidation-number concept, balancing redox reactions and stoichiometry.
Atomic Structure	The electromagnetic and atomic spectra, the characteristics of electron, proton and neutron, Rutherford's model, Planck's quantum theory and the photoelectric effect, the hydrogen spectrum and Bohr's theory with its failure, the wave-particle nature of the electron, de Broglie's hypothesis and Heisenberg's uncertainty principle, the quantum mechanical model, quantum numbers and orbital shapes, the (n+l) rule, and the Aufbau principle, Pauli's exclusion principle and Hund's rule.
Periodic Classification of Elements	The characteristics of elements in groups and periods, atomic number and electronic configuration as the basis of classification, the s, p, d and f blocks and their main characteristics, periodic trends in physical and chemical properties, and the study of the different groups.
Chemical Bonding	Ionic and covalent bonds, the electronic configuration of the noble gases, sigma and pi bonds with examples, molecular shapes with bond lengths and angles, hybridisation explained through water, boron trifluoride, methane and ammonia, and hydrogen bonding and its types.
Carbon and its Compounds	Why carbon is studied separately, the classification of organic compounds, alkanes, alkenes, alkynes and aromatic and aliphatic compounds, bonding and hybridisation in carbon, allotropes, tetravalency, catenation and isomerism, functional groups and homologous series, combustion, oxidation, addition and substitution reactions, nomenclature, carbohydrates, proteins, oils and fats, and polymers including polythene, nylon, PVC and rubber.
Environmental Chemistry	Types of pollution, acid rain, ozone and its reactions and the effects of ozone depletion, the greenhouse effect and global warming, and green chemistry as a way of reducing pollution.
Metallurgy	Occurrence of metals, minerals and ores, extraction with the activity series and the steps from ore to metal, refining and electrolytic refining, corrosion and its prevention, and alloys and their uses.

Dates, fee and marks, as the notice prints them

Item	As printed in the notice
Detailed CEN published on the RRB websites	13.08.2026
Indicative notice in Employment News	25.07.2026
Online application opens	14.08.2026
Last date to submit the online application	13.09.2026, up to 23:59 hours
Last date for payment of the application fee	15.09.2026
Modification window, on payment of a modification fee	16.09.2026 to 25.09.2026. The notice adds that the details filled in the 'Create an Account' form and the chosen RRB cannot be modified.
Window for eligible scribe candidates to give their scribe details	26.09.2026 to 30.09.2026
Pay level and initial pay	Level 6 of the 7th CPC pay matrix; initial pay ₹35,400
Total vacancies	3993 in the CEN's own table; Corrigendum-1 directs that it be read as 4029. Both figures are the notice's own — the difference is not added up here.
Examination fee	₹500 for all candidates; ₹250 for SC, ST, Ex-Servicemen, PwBD, Female, Transgender, Minority and Economically Backward Class candidates
Fee refunded on appearing in CBT-1	₹400 out of the ₹500, and the whole of the ₹250 — in both cases less bank charges, and only to a bank account seeded with the candidate's Aadhaar
Negative marking	1/3 of the marks of that question, in both CBT-1 and CBT-2
Minimum percentage of marks for eligibility	UR 40%, EWS 40%, OBC-NCL 30%, SC 30%, ST 25%. The same applies to Ex-Servicemen as per their community, and may be relaxed by 2 marks for PwBD candidates where there is a shortage against reserved vacancies.
Shortlist for CBT-2	15 times the community-wise total vacancy of the posts notified against that RRB, on normalised CBT-1 marks. The notice reserves the right to raise or lower this limit.
Shortlist for Document Verification	Equal to the number of vacancies, on merit in CBT-2
Medium of the question paper	English, Hindi and 13 regional languages — Assamese, Bengali, Gujarati, Kannada, Konkani, Malayalam, Manipuri, Marathi, Odia, Punjabi, Tamil, Telugu and Urdu. Questions are displayed in the language you opt for and in English.
Dates of CBT-1, CBT-2, Document Verification and the Medical Examination	Not in this CEN. It states they will be communicated from time to time through the official websites of the concerned RRBs.

Which Exam Group your qualification puts you in (Para 13.3)

Your three-year diploma or engineering degree	Your Exam Group
Mechanical, Production, Automobile, Manufacturing, Mechatronics, Industrial, Machining, Tools and Machining, or Tools and Die Making Engineering — or a combination of any sub-stream of these	Mechanical and Allied Engineering
Electrical Engineering, or a combination of any sub-stream of Electrical Engineering	Electrical and Allied Engineering
Electronics, Instrumentation and Control, Communication, Computer Science and Engineering, Computer Engineering, Computer Science, or Information Technology — or a combination of sub-streams of these	Electronics and Allied Engineering
Civil Engineering, a combination of any sub-stream of Civil Engineering, or a three-year B.Sc. in Civil Engineering	Civil and Allied Engineering
B.Sc. degree in Physics and Chemistry — added by Corrigendum-1 for the Chemical & Metallurgical Assistant post only	CMA

How the selection works, stage by stage (Para 13.0 and 13.4)

Stage or term	What the notice says
Stage 1 — 1st Stage CBT (CBT-1)	Screening in nature. The notice says its normalised score is used only to shortlist candidates for CBT-2, so no mark you score here reaches the final merit.
Stage 2 — 2nd Stage CBT (CBT-2)	The paper the job rests on. Shortlisting for it is 15 times the community-wise vacancy, and its normalised marks decide who is called for document verification.
Stage 3 — Document Verification (DV)	Candidates equal to the number of vacancies are called, on merit in CBT-2 and their options. Original certificates must be produced on the date given; no extra time is allowed.
Stage 4 — Medical Examination (ME)	Appointment is subject to passing the medical fitness test for the post opted for. The medical standard differs post by post and is printed against each post in Annexure A.
Normalisation	When a CBT is held in more than one session for the same syllabus, the raw marks of each session are converted into normalised marks.
Merit Index	A common score that lets candidates from different Exam Groups be ranked against the same post: Merit Index = Sq + (St − Sq) × (M − Mq) ÷ (Mt − Mq).
M, Mq, Mt, Sq and St	M is the marks you obtained — raw in a single-session exam, normalised in a multi-session one. Mq is the qualifying marks for a general-category candidate in that paper, which the notice states as 40. Mt is the mean marks of the top 0.1% of the candidates who appeared, or of the top 10, whichever is larger. Sq is 350, the score assigned to Mq, and St is 900, the score assigned to Mt.
Who gets a Merit Index at all	UR, EWS, OBC-NCL, SC and ST candidates whose marks are equal to or above their own community's qualifying marks.
If two candidates score the same	The older candidate is placed higher. If the age is also the same, the alphabetical order of the given name — not the surname — breaks the tie.

Age on 01.01.2027, and the relaxations the notice allows

Category or situation	As printed in the notice
Age group for these posts	18 to 33 years, reckoned as on 01.01.2027
Lower age limit — all communities	Not born after 01.01.2009
Upper age limit — UR and EWS	Date of birth not earlier than 02.01.1994
Upper age limit — OBC-NCL	Date of birth not earlier than 02.01.1991
Upper age limit — SC and ST	Date of birth not earlier than 02.01.1989
Relaxation — SC and ST	5 years
Relaxation — OBC (Non-Creamy Layer)	3 years
Relaxation — Ex-servicemen with at least six months' continuous service after attestation	3 years for UR and EWS, 6 years for OBC-NCL and 8 years for SC and ST, in each case after the length of service is deducted from the age
Relaxation — Persons with Benchmark Disabilities	10 years for UR and EWS, 13 years for OBC-NCL and 15 years for SC and ST
Serving Group C and erstwhile Group D railway staff with at least 3 years' service, and substitutes with 3 years' continuous or broken service	Maximum upper age 40 years for UR and EWS, 43 for OBC-NCL and 45 for SC and ST
Staff of quasi-administrative offices of the railway organisation, such as railway canteens, co-operative societies and institutes	Up to the length of service rendered, or 5 years, whichever is less
Women who are widowed, divorced or judicially separated from their husband and not remarried	Maximum upper age 35 years for UR and EWS, 38 for OBC-NCL and 40 for SC and ST
If more than one relaxation applies	Only the largest single relaxation is given. They are not added together.
SC, ST and OBC-NCL candidates applying against an unreserved vacancy	No age relaxation is available. PwBD candidates applying against an unreserved vacancy get the PwBD (UR) relaxation only.

Not covered in this pack — where to find it

Exact examination dates for CBT-1 and CBT-2	Not in the notice. It says the dates for the CBT, document verification and medical examination will be communicated from time to time through the official websites of the concerned RRBs, and that no request for postponement or a change of venue, date or shift will be entertained. Official PDF ↗
Post-wise and RRB-wise vacancies	Only the totals are in the body of the notice — 3993, to be read as 4029 after Corrigendum-1. The RRB-wise and Railway zone-wise split runs across Annexure B, pages 35 to 58 of the CEN, and the notice states these numbers are provisional and may increase or decrease. Official PDF ↗
Cut-off marks	Not stated. The notice gives only the minimum qualifying percentages — UR 40, EWS 40, OBC-NCL 30, SC 30, ST 25. The actual cut-off follows from the 15-times shortlist for CBT-2 and from the number of vacancies at document verification, so it can only be known after the examination. Official PDF ↗
Post-wise medical standards and the educational qualification for each post	Named but not reproduced here. Annexure A of the CEN, pages 31 to 34, carries all 37 posts with their department, sub-department, medical standard, PwBD suitability and minimum educational qualification; Corrigendum-1 adds the 38th post and a fourth medical standard, B-2. The CEN also notes that a B.E. or B.Tech in the same discipline is acceptable in place of a three-year diploma. Official PDF ↗
How many questions come from each subject inside Technical Abilities	Not printed. The notice gives 100 questions and 100 marks for the whole Technical Abilities section and states that the section-wise distribution is only indicative, with some variation possible in the actual paper. Treat every numbered subject of your annexure as examinable. Official PDF ↗
Your exam city, date and shift	Not in the notice, and not sent by post. It says the city and date intimation, the e-call letter and the travel authority (where applicable) are downloaded from links on the official RRB websites, and that mock tests are put there too. Official PDF ↗

Free practice — 20 questions

Work out the answer yourself first, then tap “Show answer”. Every answer shows the method, not just the letter.

How many questions does the 1st Stage CBT (CBT-1) carry?
- A 80
- B 100
- C 120
- D 150
Show answer

B — 100

Para 13.1 of CEN 04/2026 prints 100 questions for CBT-1, and its own section table carries a Total row of 100 questions and 100 marks.

CBT-1 structure
How long is CBT-1 for a candidate who is not eligible for a scribe?
- A 60 minutes
- B 75 minutes
- C 90 minutes
- D 120 minutes
Show answer

C — 90 minutes

Para 13.1 states 90 minutes, and 120 minutes for candidates who are eligible for the use of a scribe.

CBT-1 structure
How many marks does General Awareness carry in CBT-1?
- A 15
- B 20
- C 25
- D 30
Show answer

A — 15

The CBT-1 table in Para 13.1 gives Mathematics 30, General Intelligence & Reasoning 25, General Awareness 15 and General Science 30.

CBT-1 structure
Which two sections carry the most marks in CBT-1?
- A General Awareness and Reasoning
- B Mathematics and General Science
- C Reasoning and General Science
- D Mathematics and General Awareness
Show answer

B — Mathematics and General Science

Mathematics and General Science carry 30 marks each in the CBT-1 table; Reasoning carries 25 and General Awareness 15.

CBT-1 structure
How many questions does the 2nd Stage CBT (CBT-2) carry?
- A 100
- B 120
- C 150
- D 175
Show answer

C — 150

Para 13.2 prints 150 questions for CBT-2, and its section table carries a Total row of 150 questions and 150 marks.

CBT-2 structure
How many of CBT-2's 150 marks come from the Technical Abilities section?
- A 50
- B 75
- C 100
- D 120
Show answer

C — 100

The CBT-2 table gives Technical Abilities 100 questions and 100 marks — two thirds of the paper — with the remaining 50 marks split across General Awareness, Physics & Chemistry, Basics of Computers and Applications, and Basics of Environment and Pollution Control.

CBT-2 structure
How much is deducted for a wrong answer in the RRB JE computer-based tests?
- A Nothing
- B 1/4 of the marks for that question
- C 1/3 of the marks for that question
- D 1/2 of the marks for that question
Show answer

C — 1/3 of the marks for that question

The notice states negative marking at 1/3 of the marks allotted for each question, separately under CBT-1 in Para 13.1 and under CBT-2 in Para 13.2.

Marking and qualifying marks
What is the minimum qualifying percentage for an unreserved candidate?
- A 25%
- B 30%
- C 35%
- D 40%
Show answer

D — 40%

Both CBT paragraphs print the same list: UR 40%, EWS 40%, OBC-NCL 30%, SC 30% and ST 25%.

Marking and qualifying marks
What is the minimum qualifying percentage for a Scheduled Tribe candidate?
- A 20%
- B 25%
- C 30%
- D 40%
Show answer

B — 25%

ST is 25% in the notice's list. It adds that this percentage may be relaxed by 2 marks for PwBD candidates where there is a shortage against the vacancies reserved for them.

Marking and qualifying marks
How many candidates are shortlisted for CBT-2?
- A Equal to the number of vacancies
- B 5 times the community-wise vacancy
- C 10 times the community-wise vacancy
- D 15 times the community-wise vacancy
Show answer

D — 15 times the community-wise vacancy

Para 13.2 states the shortlist is 15 times the community-wise total vacancy of the posts notified against that RRB, on normalised CBT-1 marks — and that the Railways reserve the right to increase or decrease the limit.

Shortlisting
How many candidates are called for Document Verification?
- A Equal to the number of vacancies
- B Twice the number of vacancies
- C 15 times the number of vacancies
- D The notice does not say
Show answer

A — Equal to the number of vacancies

Para 13.4.3 (a) states that candidates are shortlisted for DV on their marks and merit in CBT-2 and their options, and that the number shortlisted will be equal to the number of vacancies.

Shortlisting
Which stage's marks decide the merit for Document Verification?
- A CBT-1 only
- B CBT-2 only
- C CBT-1 and CBT-2 added together
- D CBT-2 and the medical examination
Show answer

B — CBT-2 only

Para 13.1 says the normalised score of the 1st stage is used only for shortlisting candidates for the 2nd stage, and Para 13.4 says shortlisting for DV is on the normalised marks of CBT-2. CBT-1 marks never enter the final merit.

Shortlisting
What is the pay level of the Junior Engineer posts in CEN 04/2026?
- A Level 4
- B Level 5
- C Level 6
- D Level 7
Show answer

C — Level 6

The post table on the CEN's first page gives Level 6 in the 7th CPC pay matrix with an initial pay of ₹35,400.

Posts and pay
On which date is the age limit for CEN 04/2026 reckoned?
- A 01.01.2026
- B 14.08.2026
- C 13.09.2026
- D 01.01.2027
Show answer

D — 01.01.2027

Para 5.0 states that the lower and upper age limits indicated for a post are reckoned as on 01.01.2027; the age group for these posts is 18 to 33 years.

Age and fee
What examination fee does a candidate outside the concession list pay?
- A ₹250
- B ₹500
- C ₹750
- D ₹1,000
Show answer

B — ₹500

Para 7.0 sets ₹500 for all candidates except those it lists, and ₹250 for SC, ST, Ex-Servicemen, PwBD, Female, Transgender, Minority and EBC candidates. Of the ₹500, ₹400 is refunded on appearing in CBT-1; the ₹250 is refunded in full, less bank charges.

Age and fee
A candidate holds a three-year diploma in Information Technology. Which Exam Group is he or she tested in?
- A Civil and Allied Engineering
- B Electrical and Allied Engineering
- C Electronics and Allied Engineering
- D Mechanical and Allied Engineering
Show answer

C — Electronics and Allied Engineering

The Discipline Mapping Table at Para 13.3 puts Electronics, Instrumentation and Control, Communication, Computer Science and Engineering, Computer Engineering, Computer Science and Information Technology in the Electronics and Allied Engineering group, whose syllabus is Annexure-VIII (C).

Exam Group
In which stage is a virtual calculator provided on the computer screen?
- A CBT-1 only
- B CBT-2 only
- C Both CBT-1 and CBT-2
- D Neither
Show answer

B — CBT-2 only

Para 13.2 (iv) states that a virtual calculator will be made available on the computer monitor during the 2nd Stage CBT. Para 13.1 says nothing of the kind for CBT-1, and Para 13.0 bars candidates from bringing a calculator of their own.

Exam day
In the Merit Index formula, what score does the notice assign to the qualifying marks Mq?
- A 40
- B 100
- C 350
- D 900
Show answer

C — 350

Para 13.4.2 states Sq = 350 is the score assigned to Mq, and St = 900 the score assigned to Mt. Mq itself, the qualifying marks for a general-category candidate, is 40.

Merit Index
Two candidates finish with exactly the same marks. Who is placed higher?
- A The younger candidate
- B The older candidate
- C The one who applied first
- D It is decided by lot
Show answer

B — The older candidate

Para 13.4.3 (b) states that where two or more candidates secure equal marks the older candidate is given higher merit, and if the age is the same too, the alphabetical order of the given name — not the surname — breaks the tie.

Merit Index
Which post did Corrigendum-1 add to CEN 04/2026?
- A Junior Engineer (IT)
- B Depot Material Superintendent
- C Chemical & Metallurgical Assistant
- D Senior Section Engineer
Show answer

C — Chemical & Metallurgical Assistant

Corrigendum-1 of 18.08.2026 adds the Chemical & Metallurgical Assistant post with 35 vacancies, its own CMA Exam Group in the mapping table, a new syllabus at Annexure-VIII (E) and the medical standard B-2; it also directs that the CEN's title and its total vacancy figure be read accordingly. Depot Material Superintendent was in the original CEN.

Posts and pay

These questions are built from the official pattern and syllabus on this page. Every answer was independently re-solved before it was published.

Every fact on this page — the two CBT patterns, the syllabus of all five Exam Groups, the dates, the fee, the age table and the Merit Index — is read off the Railway Recruitment Boards' own Detailed Centralised Employment Notice CEN No. 04/2026, published on 13.08.2026, together with its Corrigendum-1 of 18.08.2026, and explained here in our own words. A later corrigendum or a new CEN can change any of it, so confirm against the notice itself: RRB, Detailed CEN No. 04/2026 — Junior Engineer and DMS (rrb.indianrailways.gov.in) ↗

This exam recruits at these levels: Diploma Graduate

Note — Always confirm the syllabus and pattern against that year's official notification — changes are possible.

Start PractisingPlay a free quiz in Meri Taiyari

Official source: https://rrb.indianrailways.gov.in/-/image/1787058904504CEN_04_2026_JE_DMS_English.pdf/examsDocuments

By SarkariReady Editorial Team · Updated: 09 Sep 2026 · Source: rrb.indianrailways.gov.in