RRB JE CBT 1 Syllabus

The RRB JE CBT 1 (Computer Based Test Stage 1) is the preliminary screening examination for the RRB Junior Engineer 2027 recruitment. All candidates who apply for JE posts appear in CBT 1 together, regardless of their engineering discipline. The primary purpose of CBT 1 is to shortlist candidates for CBT 2 in a ratio of approximately 15 times the total post-wise vacancy. CBT 1 scores are NOT counted in the final merit list; only CBT 2 scores determine the final ranking.

CBT 1 covers four subjects: Mathematics (30 questions), General Intelligence and Reasoning (25 questions), General Awareness (15 questions), and General Science (30 questions) for a total of 100 questions and 100 marks in 90 minutes. The General Science section is set at Class 12 Physics and Chemistry level, which is higher than the Class 10 level tested in NTPC or Group D.

Quick Facts: RRB JE CBT 1 2027

CBT 1 Exam Pattern

Mathematics Syllabus (30 Questions)

Mathematics in CBT 1 is set at Class 10 to Class 12 level, slightly more advanced than NTPC or Group D. Candidates should expect questions requiring multi-step calculation.

Number System and Arithmetic

•        Number System: HCF and LCM by prime factorisation; divisibility rules; properties of integers

•        Simplification: BODMAS, complex arithmetic expressions with fractions and surds

•        Percentage: percentage change, successive percentage changes, applications in profit and population

•        Ratio and Proportion: compound ratio, inverse ratio, partnership problems

•        Profit, Loss and Discount: SP, CP, MP, trade discount, successive discounts, equivalent single discount

•        Simple Interest and Compound Interest: SI formula, CI with annual/half-yearly/quarterly compounding, difference between CI and SI

•        Time and Work: combined work, efficiency, pipes and cisterns (multiple inlet and outlet)

•        Time, Speed and Distance: average speed, relative speed, trains (two train problems), boats and streams

•        Mixture and Alligation: two-component and three-component alligation problems

Algebra

•        Algebraic Identities: (a+b)^2, (a-b)^2, a^2-b^2, (a+b)^3, (a-b)^3, sum and product of cubes

•        Linear Equations: one variable and two variables; word problems

•        Quadratic Equations: factorisation, quadratic formula, nature of roots, sum and product of roots

•        Polynomials: types, division, remainder theorem, factor theorem

•        Indices and Surds: laws of indices, rationalisation of surds

•        Logarithms: laws of logarithm, change of base, applications

Geometry and Mensuration

•        Lines and Angles: parallel lines, transversals, angle sum properties

•        Triangles: congruence (SSS, SAS, ASA, RHS), similarity (AA, SSS, SAS), BPT, Pythagoras theorem

•        Quadrilaterals: parallelogram, rectangle, rhombus, square, trapezium; properties and proofs

•        Circles: chord properties, tangent-secant theorems, angle subtended by arc, cyclic quadrilateral

•        2D Mensuration: area and perimeter of all standard shapes; area of sector and segment

•        3D Mensuration: TSA and volume of cube, cuboid, cylinder, cone, sphere, hemisphere, frustum

Trigonometry and Coordinate Geometry

•        Trigonometric Ratios and Identities: sin, cos, tan, cosec, sec, cot; sin^2+cos^2=1 and related identities

•        Trigonometric Values: standard angles (0, 30, 45, 60, 90); complementary angles

•        Heights and Distances: angle of elevation and depression; problems with single and double angles

•        Coordinate Geometry: distance formula, midpoint formula, section formula, area of triangle, slope of a line, equation of a line (slope-intercept, two-point, intercept form)

Statistics and Probability

•        Statistics: arithmetic mean (direct, assumed mean, step deviation methods), median (ungrouped and grouped data), mode, range

•        Graphical Representation: bar graph, histogram, frequency polygon, ogive, pie chart

•        Probability: favourable outcomes / total outcomes; complementary and mutually exclusive events; problems with coins, dice, cards, coloured balls

•        Data Interpretation: table DI, bar chart DI, pie chart DI, line graph DI; multi-step calculation from data

General Intelligence and Reasoning Syllabus (25 Questions)

Verbal Reasoning

•        Number and Alphabetical Series: finding missing or wrong terms; patterns in arithmetic, geometric, Fibonacci, and mixed sequences

•        Analogies: word, number, and letter analogies; identifying the relationship pattern

•        Coding and Decoding: letter coding, number coding, symbol-based coding, conditional coding

•        Blood Relations: direct and coded family relationship problems

•        Directions and Distance: compass directions, shortest path, displacement

•        Syllogism: All/Some/No categorical statements; valid conclusions; possibility-based conclusions; Venn diagram method

•        Mathematical Operations: symbol substitution; evaluating expressions after replacing operators

•        Statement and Conclusion / Assumption / Courses of Action

•        Cause and Effect: identifying cause-effect pairs from given statements

•        Critical Reasoning: argument evaluation, strengthening and weakening, inference drawing

Non-Verbal Reasoning

•        Figure Series: identifying pattern in a sequence of figures; selecting the next figure

•        Matrix Completion: selecting the missing figure in a 3x3 or 2x2 matrix

•        Mirror and Water Images: lateral and vertical inversion of figures, letters, clock faces

•        Paper Folding and Cutting: identifying the pattern after unfolding a punched or cut paper

•        Embedded Figures: identifying a smaller figure hidden within a larger complex figure

•        Figure Counting: counting triangles, squares, and rectangles within complex figures

Logical and Analytical Reasoning

•        Seating Arrangement: linear (single and double row), circular, square with multiple conditions

•        Puzzles: floor-based, box-based, scheduling, age-based

•        Venn Diagrams: selecting correct Venn diagram; solving from given diagram regions

•        Data Sufficiency: determining whether given statements are sufficient to answer a question

•        Input-Output: machine rearrangement of words and numbers across multiple steps

•        Classification: grouping objects by common properties; odd one out

General Awareness Syllabus (15 Questions)

Given the low weightage (15 marks), focus on high-frequency, high-probability topics rather than exhaustive coverage.

•        Current Affairs: major national and international events from the last 12 months; government policy announcements; science and technology news (ISRO missions, defence)

•        Indian Railways: railway history, 21 zones and headquarters, types of trains, major infrastructure projects (Vande Bharat, Bullet Train, KAVACH, DFC), railway firsts

•        Indian History: freedom struggle key events and personalities; major ancient, medieval, and modern history highlights

•        Indian Geography: major rivers, mountain ranges, physical features; states and capitals; national parks

•        Indian Polity: Constitutional provisions; Fundamental Rights; government structure; key amendments

•        Indian Economy: GDP, budget basics, major government schemes, banking

•        Science and Technology: recent ISRO launches, satellite types, notable national and international achievements

•        Awards and Appointments: Nobel Prizes, Bharat Ratna, Padma Awards, national sports awards, new appointments to key positions

•        Sports: major tournaments and results; Indian achievements in Olympics, Commonwealth, Asian Games

•        Static GK: national symbols, UNESCO World Heritage Sites in India, important days and dates

General Science Syllabus (30 Questions)

This is the most important section for JE candidates and is tested at Class 12 Physics and Chemistry level (NCERT). Engineering candidates with a strong academic background typically score high in this section.

Physics (Class 12 Level)

•        Electrostatics: Coulomb's Law, electric field and potential, capacitors (series and parallel), dielectrics, energy stored in capacitors

•        Current Electricity: Ohm's Law, resistance (series and parallel), Kirchhoff's Laws, Wheatstone bridge, potentiometer, heating effect

•        Magnetic Effects of Current: Biot-Savart Law, Ampere's Law, force on current-carrying conductor, torque on a loop, galvanometer, ammeter, voltmeter

•        Electromagnetic Induction: Faraday's Laws, Lenz's Law, self-inductance, mutual inductance, AC generator

•        Alternating Current: peak and RMS values, LCR circuits, resonance, power factor, transformer

•        Optics: Snell's Law, total internal reflection, refraction through prisms, lenses (thin lens formula), optical instruments (microscope, telescope), wave optics (Young's double slit, diffraction, polarisation)

•        Modern Physics: photoelectric effect (Einstein's equation), de Broglie hypothesis, Bohr's atomic model, hydrogen spectrum, nuclear fission and fusion, radioactive decay, half-life

•        Semiconductor Devices: p-n junction diode, Zener diode, transistors (p-n-p, n-p-n), logic gates

Chemistry (Class 12 Level)

•        Solid State: crystal structures, unit cells, imperfections, electrical and magnetic properties

•        Solutions: types, concentration terms (molarity, molality, normality), Raoult's Law, osmosis, colligative properties

•        Electrochemistry: electrode potential, EMF of cells, Nernst equation, Faraday's Laws of Electrolysis, corrosion

•        Chemical Kinetics: rate of reaction, rate law, rate constant, activation energy, Arrhenius equation, order and molecularity

•        Surface Chemistry: adsorption, catalysis (homogeneous, heterogeneous), colloids, emulsions

•        p-Block Elements: properties and compounds of Groups 15, 16, 17, 18 elements; oxoacids; halogens

•        d and f-Block Elements: transition metals, oxidation states, colour, magnetic properties; lanthanides and actinides

•        Coordination Compounds: IUPAC nomenclature, bonding (Werner's Theory, VBT, CFT), isomerism

•        Organic Chemistry: reactions (SN1, SN2, E1, E2); alcohols, phenols, ethers; aldehydes and ketones; carboxylic acids; amines; biomolecules (carbohydrates, proteins, nucleic acids)

•        Polymers and Chemistry in Daily Life: classification of polymers, natural and synthetic; drugs, dyes, preservatives

Topic-wise Weightage Analysis for CBT 1

CBT 1 Preparation Tips

1. Treat General Science as Your Scoring Section

Engineering candidates have a natural advantage in General Science. With Class 12 Physics and Chemistry as the base, ensure you revise Class 12 NCERT Physics and Chemistry thoroughly. Focus on Electrostatics, Current Electricity, Electromagnetic Induction, Electrochemistry, and Organic Chemistry -- these are consistently high-frequency in JE papers.

2. Build Mathematics at Class 12 Difficulty

JE CBT 1 Mathematics is harder than NTPC. Practise Data Interpretation, Coordinate Geometry, Logarithms, and advanced Algebra alongside the standard arithmetic cluster. Practise under timed conditions from the start.

3. Efficient GA Preparation

With only 15 GA marks, avoid over-investing in this section. Spend 15 to 20 minutes daily on current affairs and dedicate one focused session per week to static GK (Indian Railways, History, Geography). This is sufficient for the CBT 1 GA target.

4. Target CBT 1 Cut-Off Plus a Safety Margin

Since CBT 1 is only a screening test, your goal is to cross the cut-off comfortably. Aim for 70 to 75 marks out of 100 to ensure shortlisting with a reasonable safety margin across most categories and RRB zones.

Frequently Asked Questions: CBT 1

Q1. Does CBT 1 score count in the final merit list?

No. The CBT 1 score is used only for shortlisting candidates for CBT 2. The final merit list is based entirely on CBT 2 scores.

Q2. What is the shortlisting ratio for CBT 2?

Candidates are shortlisted for CBT 2 in a ratio of approximately 15 times the total post-wise vacancy in each category (UR, OBC, SC, ST), subject to availability of eligible candidates.

Q3. Is General Science in CBT 1 at Class 10 or Class 12 level?

General Science in RRB JE CBT 1 is at Class 12 level (Physics and Chemistry), unlike NTPC or Group D where it is at Class 10 level. This is a critical difference and JE candidates must prepare accordingly.