RRB JE CBT 2 Syllabus

The RRB JE CBT 2 (Computer Based Test Stage 2) is the main examination of the RRB Junior Engineer 2027 recruitment. Only candidates who qualify CBT 1 are eligible to appear. The CBT 2 score is the sole basis for the final merit list and determines selection for Document Verification and subsequent appointment. CBT 2 consists of 150 questions carrying 150 marks in 120 minutes.

CBT 2 has two distinct components: a 100-question engineering discipline-specific section that tests deep technical knowledge in the candidate's applied discipline (Civil, Electrical, Mechanical, Electronics, IT, etc.), and a 50-question common technical section covering Physics and Chemistry, Computer Applications basics, Environmental Science, and Engineering Drawing (for applicable posts).

Quick Facts: RRB JE CBT 2 2027

CBT 2 Exam Pattern

Note: The exact allocation between Physics/Chemistry, Computer Applications, Environment, and Engineering Drawing may vary slightly by post as specified in the official notification. The 100-mark discipline section remains constant.

Engineering Discipline Section (100 Questions)

The engineering discipline section tests candidates on the core technical knowledge of their applied engineering field at the Diploma or Degree level. This is the primary differentiator in JE selection. The syllabus for each discipline is covered in its dedicated subject page. Navigate to your discipline using the table below.

Common Technical Section Syllabus (50 Questions)

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

Engineering Drawing (15 Questions -- Civil, Mechanical, Electrical posts)

•        Types of lines: continuous thick, continuous thin, dashed, chain; their uses in technical drawings

•        Dimensioning: types of dimensioning (linear, angular, radial), standard conventions (ISO and BIS)

•        Scales: representative fraction, plain scale, diagonal scale, scale of chords

•        Orthographic Projection: first angle (European) and third angle (American) projection; drawing top, front, and side views

•        Sectional Views: full section, half section, partial section, revolved section; section lines and conventions

•        Isometric Drawing: isometric axes, drawing 3D objects isometrically from given orthographic views

•        Auxiliary Views: primary and secondary auxiliary views for inclined surfaces

•        Geometric Constructions: bisecting a line and an angle, constructing regular polygons, drawing tangents to circles, ellipse construction

•        Projection of Points, Lines, and Planes: true length, inclinations to HP and VP

•        Projection of Solids: prisms, pyramids, cylinders, cones in various positions; sectional views of solids

•        Development of Surfaces: lateral surface development of prisms, cylinders, pyramids, cones; transition pieces

•        Screw Threads: types (V thread, square, ACME, buttress), representation, designation

•        Engineering Fasteners: bolts, nuts, washers, studs, keys, pins; standard representations

•        Welded Joints: types of welds, welding symbols as per BIS standards

•        Assembly Drawing: reading and interpreting assembly drawings; part identification

CBT 2 Preparation Strategy

1. Engineering Discipline Section is the Priority

With 100 out of 150 marks from engineering discipline questions, the technical section determines your JE rank. Revise systematically from your Diploma or Degree textbooks, solve subject-specific previous years' papers (including GATE, ESE, SSC JE, and previous RRB JE papers for your discipline), and ensure strong coverage of all major topic areas.

2. Allocate Time Proportionally in the Examination

With 150 questions in 120 minutes, you have an average of 48 seconds per question. Allocate approximately 70 minutes to the engineering discipline section and 50 minutes to the common technical section. Do not allow any single difficult question to consume disproportionate time.

3. Engineering Drawing Preparation

Engineering Drawing questions test visual-spatial reasoning and knowledge of technical drawing conventions. Practise orthographic projections, isometric drawings, and development of surfaces from standard textbooks. These questions can be completed quickly with practice and offer reliable marks.

Frequently Asked Questions: CBT 2

Q1. Is the CBT 2 syllabus the same for all engineering disciplines?

The 50-mark common technical section is the same for all JE disciplines. The 100-mark engineering discipline section is entirely different for each discipline.

Q2. Is there an Engineering Drawing component for all JE posts?

Engineering Drawing is applicable primarily to Civil, Mechanical, and Electrical JE posts. For IT and some other posts, this component may be replaced by additional questions in Computer Applications or domain-specific subjects. Check the official notification for post-specific CBT 2 pattern.

Q3. What is the recommended resource for the engineering discipline section?

Study from standard textbooks used in your Diploma or Degree course (e.g., Ramamrutham for Civil Structures, Nagrath and Kothari for Electrical Machines, Cengel for Thermodynamics). Supplement with SSC JE and previous RRB JE question banks for practice.