Junior Engineer, Depot Material Superintendent & Chemical and Metallurgical Assistant — now 4,029 vacancies
The Railway Recruitment Boards (RRBs), under the Ministry of Railways, have issued Corrigendum-1 for Centralised Employment Notice (CEN) No. 04/2026. The original notice covered recruitment for Junior Engineer (JE) and Depot Material Superintendent (DMS) posts. The corrigendum adds Chemical & Metallurgical Assistant (CMA) as a brand-new post, adds one Junior Engineer/Electrical/TRS vacancy, inserts the CMA syllabus, and adds Medical Standard B-2.
This corrigendum matters for every candidate applying under RRB CEN 04/2026. The revised recruitment now covers 4,029 posts instead of 3,993. Engineering diploma/degree candidates should check the post-wise rules, while candidates holding a B.Sc. in Physics and Chemistry can now apply for the newly added CMA post. Existing applicants must also review the revised exam-group, vacancy, and medical-standard provisions before final submission.
📋 What Has Changed?
| Amendment | Revised Position |
|---|---|
| New post added | Chemical & Metallurgical Assistant (CMA), Category No. 38 |
| Additional JE vacancy | 1 Junior Engineer/Electrical/TRS vacancy under RRB Secunderabad, South Central Railway |
| CMA vacancies | 35 vacancies across selected RRBs/Railway Production Units |
| Total vacancies | 3,993 → 4,029 |
| CMA pay & medical standard | Level 6, initial pay ₹35,400, Medical Standard B1 |
| New medical standard | B-2 added, with prescribed vision requirements |
| New syllabus | Annexure-VIII (E), CMA Exam Group syllabus added |
| Notice title/footer | Updated to CEN No. 04/2026 (JE/DMS/CMA) |
🗂️ Key Recruitment Details
| Particular | Details |
|---|---|
| Recruitment authority | Railway Recruitment Boards (RRBs), Ministry of Railways |
| Centralised Employment Notice | CEN No. 04/2026, now titled JE/DMS/CMA |
| Original notice date | 13 August 2026 |
| Corrigendum-1 date | 18 August 2026 |
| Posts covered | Junior Engineer, Depot Material Superintendent, Chemical & Metallurgical Assistant |
| Revised total vacancies | 4,029 |
| Pay level | Level 6, 7th CPC |
| Initial pay | ₹35,400 |
| Application mode | Online only |
| Official application portal | rrbapply.gov.in |
📅 Important Dates
CBT-I, CBT-II, Document Verification, and Medical Examination dates will be notified separately by the Railway Recruitment Boards.
🧪 New Post — Chemical & Metallurgical Assistant (CMA)
The principal addition in Corrigendum-1 is the Chemical & Metallurgical Assistant (CMA) post under Category No. 38. The post belongs to the Mechanical Department, CMT sub-department. It carries Level 6 of the 7th CPC, an initial pay of ₹35,400, Medical Standard B1, and an age range of 18–33 years as on 1 January 2027, subject to the age-relaxation provisions of Para 5.2 of the CEN.
| CMA Particular | Details |
|---|---|
| Category number | 38 |
| Department / sub-department | Mechanical / CMT |
| Pay level | Level 6 |
| Initial pay | ₹35,400 |
| Medical standard | B1 |
| Age limit | 18–33 years as on 01 January 2027 |
| Total vacancies | 35 |
CMA Educational Qualification
Candidates must hold a B.Sc. degree in Physics and Chemistry with at least 45% marks from a recognized University or Institute, fulfilled through any of the following combinations:
CMA Vacancy Distribution
| RRB | Railway/PU | UR | SC | ST | OBC | EWS | Total | ExSM |
|---|---|---|---|---|---|---|---|---|
| Bengaluru | RWF | 0 | 0 | 0 | 0 | 1 | 1 | 0 |
| Bhopal | WCR | 4 | 1 | 0 | 2 | 0 | 7 | 1 |
| Chennai | SR | 5 | 1 | 1 | 2 | 2 | 11 | 1 |
| Chennai | ICF | 2 | 2 | 0 | 0 | 0 | 4 | 0 |
| Guwahati | NFR | 0 | 2 | 2 | 0 | 0 | 4 | 0 |
| Patna | RWP | 3 | 2 | 0 | 2 | 0 | 7 | 1 |
| Prayagraj | NCR | 0 | 0 | 0 | 0 | 1 | 1 | 0 |
| Grand Total (CMA) | 14 | 8 | 3 | 6 | 4 | 35 | 3 | |
The official corrigendum also provides horizontal reservation fields for PwBD categories. Candidates should consult the complete PDF for the full R-VI, R-HI, R-LD, R-OD, R-MD, B-VI, B-HI, B-LD, B-OD and B-MD matrix.
⚡ Additional JE/Electrical/TRS Vacancy
One additional vacancy has been added for Junior Engineer / Electrical / TRS under RRB Secunderabad. The vacancy belongs to the Electrical Department, TRS sub-department, South Central Railway (SCR).
| Post | Department | Sub-Department | Railway/PU | UR | Total |
|---|---|---|---|---|---|
| Junior Engineer/Electrical/TRS | Electrical | TRS | SCR | 1 | 1 |
📊 Revised Total: 3,993 → 4,029
The increase of 36 consists of 35 CMA vacancies and 1 Junior Engineer/Electrical/TRS vacancy. The corrigendum states that the concerned RRB vacancy totals stand modified accordingly.
👁️ New Medical Standard — B-2
Corrigendum-1 adds Medical Standard B-2 to the CEN. The standard requires the candidate to be physically fit in all respects and satisfy the following vision requirements:
| Requirement | Standard |
|---|---|
| General Fitness | Physically fit in all respects |
| Distance vision | 6/9, 6/12 with or without glasses; lens power must not exceed 4D |
| Near vision | Sn: 0.6, 0.6 with or without glasses, where reading/close work is required |
| Binocular vision | Must pass the binocular vision test |
The applicable medical standard depends on the post. Read the post-parameter table and the complete medical provisions in the CEN before choosing preferences.
🎓 Educational Qualification — JE, DMS & CMA
| Post | Broad Qualification |
|---|---|
| Junior Engineer (JE) | Three-year Diploma in Engineering or equivalent engineering degree in the discipline mapped to the chosen post/exam group. See Annexure-A of the CEN for exact post-wise requirements. |
| Depot Material Superintendent (DMS) | Three-year Diploma in Engineering, any discipline, or equivalent qualification accepted under the CEN. |
| Chemical & Metallurgical Assistant (CMA) | B.Sc. in Physics and Chemistry, minimum 45% marks, per the combinations in Corrigendum-1. |
📖 CMA Exam Group Syllabus — Annexure-VIII (E)
Corrigendum-1 adds Annexure-VIII (E), the syllabus for the CMA Exam Group, covering Physics, Chemistry, and related foundational science topics:
| No. | Topic |
|---|---|
| 1 | Measurements, Units & Dimensions — types of measurement errors; significance of accuracy in measurement. |
| 2 | Light — reflection, refraction, laws of reflection, total internal reflection, interference, diffraction, polarization, magnification formulae, electromagnetic spectrum. |
| 3 | Heat — sources/transmission, expansion of solids/liquids/gases, temperature scales, calorimetry, specific/latent heat, anomalous expansion of water, combustion, calorific value. |
| 4 | Sound — sources, propagation, velocity in different media, characteristics, reflection, echo, resonance, sonar, Doppler effect. |
| 5 | Mechanics — scalars/vectors, motion, friction, Newton's laws, momentum, projectile motion, floatation, work-power-energy, centre of mass/gravity, gravitation, circular motion, Kepler's laws, elasticity. |
| 6 | Magnetism — magnetic fields, induction, lines of force, pole strength, magnetic moment, inverse-square law, classification of materials. |
| 7 | Electricity & Electromagnetism — charge/field/potential, circuits, Coulomb's/Ohm's/Kirchhoff's laws, EMF, Ampere's law, electromagnetic induction, Faraday's/Lenz's law, generators, transformers. |
| 8 | Modern Physics — cathode/anode rays, X-rays, atomic models (Thomson, Rutherford, Bohr), radioactivity, isotopes/isobars/isotones, fission & fusion. |
| 9 | Electronics & Communication — semiconductors, diodes, PNP/NPN transistors, Zener diode, logic gates, modulation/demodulation. |
| 10 | Matter — states of matter, elements/compounds/mixtures, separation methods, chromatography, gas laws, mole concept. |
| 11 | Chemical Reactions — physical/chemical changes, reaction types, NaOH, bleaching powder, baking soda, washing soda, Plaster of Paris. |
| 12 | Acids, Bases & Salts — neutralization, salt classification, pH scale, oxidation-reduction, stoichiometry. |
| 13 | Atomic Structure — Bohr's theory, quantum numbers, orbital shapes, Aufbau/Pauli/Hund's principles, electronic configuration. |
| 14 | Periodic Classification — groups/periods, s/p/d/f blocks, periodic trends in physical/chemical properties. |
| 15 | Chemical Bonding — ionic/covalent bonds, sigma/pi bonds, hybridization, hydrogen bonding. |
| 16 | Carbon & Its Compounds — hydrocarbons, hybridization, isomerism, functional groups, homologous series, polymers. |
| 17 | Environmental Chemistry — pollution types, acid rain, ozone depletion, greenhouse effect, green chemistry. |
| 18 | Metallurgy — ores, extraction methods, refining, corrosion prevention, alloys. |
🎯 Selection Process
CBT-I Pattern (90 minutes)
| Subject | Questions/Marks |
|---|---|
| Mathematics | 30 |
| General Intelligence & Reasoning | 25 |
| General Awareness | 15 |
| General Science | 30 |
| Total | 100 |
CBT-II Pattern (120 minutes)
| Section | Questions/Marks |
|---|---|
| General Awareness | 15 |
| Physics & Chemistry | 15 |
| Basics of Computers & Applications | 10 |
| Basics of Environment & Pollution Control | 10 |
| Technical Abilities | 100 |
| Total | 150 |
Negative marking: One-third of the marks allotted to a question is deducted for every incorrect answer, in both CBT stages. A virtual on-screen calculator is available during CBT-II.
💰 Application Fee & Refund
| Candidate Category | Fee | Refund After Appearing in CBT-I |
|---|---|---|
| All other candidates | ₹500 | ₹400, after applicable bank charges |
| SC/ST, Ex-Servicemen, PwBD, Female, Transgender, Minority & EBC candidates | ₹250 | ₹250, after applicable bank charges |
Refund is available only to candidates who actually appear in the First Stage CBT and satisfy applicable conditions. Verify current fee instructions on the application portal.
📝 How to Apply
✅ Documents Checklist
⚠️ Important Instructions
- Read the original CEN together with Corrigendum-1 — it modifies the title, vacancy count, medical standard, DMS exam-group note, and CMA syllabus.
- Do not select CMA unless you satisfy the prescribed B.Sc. Physics and Chemistry qualification, marks, and subject combination.
- DMS applicants whose qualifying discipline isn't shown in the chart must choose an applicable Exam Group other than CMA, per amended Note (b) of Para 13.3.
- Medical fitness is mandatory; appointment is not shifted to another post if a candidate is found medically unsuitable for the allotted post.
- Your chosen RRB and account details cannot ordinarily be changed later — enter them carefully.
- Vacancies are provisional and may be revised per Railway Administration requirements.
- False information, impersonation, or unfair means can result in rejection, debarment, and legal action.
🔗 Direct Links
| Purpose | Official Link |
|---|---|
| Apply Online | RRB Application Portal |
| Download Corrigendum-1 | Official Corrigendum PDF |
| Download Original CEN | Original CEN PDF |
| Official RRB Website | rrb.indianrailways.gov.in |
❓ Frequently Asked Questions
What is RRB CEN 04/2026 Corrigendum-1?
An amendment to RRB CEN 04/2026 that adds Chemical & Metallurgical Assistant vacancies, one JE/Electrical/TRS vacancy, the CMA syllabus, and Medical Standard B-2, plus revises related wording and the total vacancy count.
How many vacancies are available after the corrigendum?
The revised total is 4,029 vacancies — up from 3,993, via 35 CMA vacancies plus 1 JE/Electrical/TRS vacancy.
How many CMA vacancies have been added?
35 Chemical & Metallurgical Assistant vacancies, across RRB Bengaluru, Bhopal, Chennai, Guwahati, Patna, and Prayagraj.
What is the CMA qualification?
A B.Sc. degree in Physics and Chemistry with at least 45% marks from a recognized university/institute, in one of the specified subject combinations.
What is the CMA salary and medical standard?
Level 6, initial pay ₹35,400, Medical Standard B1. The corrigendum separately adds B-2 as a medical standard for other applicable posts in the CEN.
What is the last date to apply?
The online application deadline is 13 September 2026, 11:59 PM. Fee-payment deadline: 15 September 2026, followed by the modification window (16–25 September 2026).
Can a candidate apply to more than one RRB?
No. Only one application to one RRB is allowed under this CEN — multiple applications can lead to rejection of all applications and debarment.
When will the CBT exam be held?
The corrigendum does not announce CBT-I or CBT-II dates — RRBs will publish the exam schedule separately on their official websites.
Where can I download the CMA syllabus?
Added as Annexure-VIII (E) in Corrigendum-1 — download the official corrigendum PDF from the Direct Links section above.
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Source: Railway Recruitment Boards, Corrigendum-1 to Centralised Employment Notice CEN No. 04/2026, dated 18 August 2026. Read the original CEN together with this corrigendum, and rely on the official application portal for final instructions.