RRB CMA Recruitment 2026 – 35 Vacancies for Chemical & Metallurgical Assistant
Post Date: 04 September 2026 | 10:00 AM
Short Information:
Railway Recruitment Board (RRB) has released the official notification for Chemical & Metallurgical Assistant (CMA) posts under CEN No. 04/2026. 35 new vacancies have been added for CMA via Corrigendum-1 on August 18, 2026 . The post is part of the RRB JE Recruitment 2026 alongside Junior Engineer and Depot Material Superintendent positions . Online applications are open from 14 August 2026 and the last date to apply is 13 September 2026. Check all details like eligibility, syllabus (especially for chemistry), selection process, and pay scale below.
Railway Recruitment Board (RRB)
RRB CMA Recruitment 2026
CEN No. 04/2026 (JE/DMS/CMA)
Important Dates
| Notification Release Date | 13 August 2026 |
| Registration Last Date | 13 September 2026 |
| Admit Card Available | Notify Later |
| Exam Date | Notify Later |
Application Fee
| Category | Fee |
|---|---|
| General / OBC / EWS | As per RRB norms |
| SC / ST / PwBD / Women / Ex-Servicemen | Exempted |
Payment Mode: Online through RRB application portal
Vacancy Details
| Post Name | Total | UR | SC | ST | OBC | EWS |
|---|---|---|---|---|---|---|
| Chemical & Metallurgical Assistant (CMA) | 35 | 14 | 8 | 3 | 6 | 4 |
Source: RRB CEN 04/2026 Corrigendum-1
Educational Qualification
| Post | Qualification |
|---|---|
| Chemical & Metallurgical Assistant (CMA) | B.Sc. degree with Physics and Chemistry (minimum 55% marks) OR equivalent as prescribed in the official notification |
Note: Candidates must possess the required qualification as on the last date of application. Check the detailed notification for exact eligibility criteria.
Pay Scale
Pay Level: Level-6 as per 7th CPC
Initial Pay: ₹35,400/- per month
Additional allowances as per railway rules
Important Links
| Apply Online | Click Here |
| Notification PDF | Click Here |
| Join For Latest Update | Click Here |
| Study Material PYQ | Click Here |
| Official Website | rrb.indianrailways.gov.in |
Selection Process
The selection process consists of the following stages:
Stage 1: CBT-1 (Computer Based Test)
Total Questions: 100
Total Marks: 100
Duration: 90 Minutes
Sections: Mathematics, Reasoning, General Science (Physics, Chemistry, Life Sciences up to 10th standard), General Awareness
Negative Marking: 1/3 mark for each wrong answer
Stage 2: CBT-2 (Computer Based Test)
Total Questions: 150
Total Marks: 150
Duration: 120 Minutes
Sections: Technical Ability (100 Marks) + Physics & Chemistry (15 Marks) + Other sections
Negative Marking: 1/3 mark for each wrong answer
Stage 3: Document Verification
Stage 4: Medical Examination
CMA Chemistry Syllabus (Chemistry Focus)
For the Chemical & Metallurgical Assistant (CMA) post, the technical paper focuses heavily on Physics and Chemistry fundamentals at the graduation level . A separate technical syllabus (Annexure-VIII (E)) has been added specifically for CMA candidates .
Key Chemistry Topics for CMA
| Topic | Details |
|---|---|
| Atomic Structure | Subatomic particles, quantum numbers, electronic configuration, Bohr's model |
| Periodic Classification | Modern periodic table, trends in properties, periodicity |
| Chemical Bonding | Ionic, covalent, metallic bonds, VSEPR theory, hybridization, molecular orbital theory |
| States of Matter | Gaseous, liquid, and solid states; ideal gas laws, kinetic theory |
| Chemical Reactions | Types of reactions, stoichiometry, redox reactions, chemical equilibrium |
| Acids, Bases and Salts | Arrhenius, Bronsted-Lowry, Lewis concepts; pH scale; buffer solutions |
| Carbon Compounds | Organic chemistry basics, hydrocarbons, functional groups, polymers |
| Environmental Chemistry | Atmospheric chemistry, water pollution, green chemistry principles |
| Metallurgy | Extraction of metals, alloys, corrosion, metallurgical processes |
Physics Topics for CMA
| Topic | Details |
|---|---|
| Measurements & Units | SI units, dimensional analysis, errors and uncertainties |
| Optics | Reflection, refraction, lenses, mirrors, wave optics |
| Heat & Thermodynamics | Temperature, heat transfer, laws of thermodynamics, kinetic theory |
| Sound & Mechanics | Wave properties, Doppler effect, Newton's laws, work, energy, power |
| Magnetism & Electricity | Electrostatics, current electricity, magnetic fields, electromagnetic induction |
| Modern Physics | Atomic models, radioactivity, nuclear reactions, photoelectric effect |
| Electronics | Semiconductors, diodes, transistors, communication systems basics |
Note: The CMA syllabus is designed at the graduate level (B.Sc. Physics & Chemistry), which is more advanced than the 10th/12th standard General Science questions in CBT-1 .
How to Apply Online
Visit the official RRB application portal: rrbapply.gov.in
Go to the CEN No. 04/2026 recruitment section.
Read the official notification carefully before applying.
Complete One Time Registration (OTR) if you are a new user.
Fill the application form with personal, educational, and other details.
Select the post preference including Chemical & Metallurgical Assistant (CMA).
Upload recent photograph, signature, and required documents.
Pay the application fee (if applicable) through online mode.
Submit the application and note down the Application Number.
Download/print the final application form for future reference.
Note: The official application portal for CEN 04/2026 is rrbapply.gov.in. Applications are open from 14 August to 13 September 2026 .
Documents Required
Recent Passport-sized Photograph
Signature
Educational Qualification Certificates (B.Sc. degree & marksheets)
Date of Birth Proof (10th Marksheet / Birth Certificate)
Caste Certificate (SC/ST/OBC-NCL)
EWS Certificate (if applicable)
PwBD Certificate (if applicable)
Domicile Certificate
ID Proof (Aadhaar / Voter ID / PAN etc.)
No Objection Certificate (for serving government employees)
Important Instructions
Application Deadline: 13 September 2026
Age Calculation Date: 1 January 2027
Only one application per candidate is allowed.
CMA vacancies are newly added and candidates should check the updated notification title: CEN 04/2026 (JE/DMS/CMA) .
A separate CMA syllabus (Annexure-VIII (E)) has been added in the corrigendum .
B-2 Medical Standard is applicable for CMA posts .
CMA Exam Group cannot be chosen for DMS candidates .
Incomplete applications will be rejected.
Candidates must have a valid email ID throughout the recruitment process.
All future communications will be sent via registered email ID only.
Canvassing in any form will be treated as disqualification.
If any discrepancy is found, candidature will be cancelled.
Frequently Asked Questions (FAQs)
1. What is the last date to apply for RRB CMA Recruitment 2026?
The last date to submit the online application is 13 September 2026 .
2. How many CMA vacancies are available?
Total 35 vacancies for Chemical & Metallurgical Assistant have been added via Corrigendum-1 .
3. What is the educational qualification for CMA?
B.Sc. degree in Physics and Chemistry with minimum 55% marks .
4. What is the age limit for CMA?
18 to 33 years (UR) as on 1 January 2027. Age relaxation for OBC (3 years) and SC/ST (5 years) .
5. What is the application fee?
Fee as per RRB norms (₹500 for General/OBC, ₹250 for SC/ST/Ex-Servicemen, Women and PwBD exempted).
6. What is the salary/pay scale for CMA?
Pay Level-6 (₹35,400 – ₹1,12,400) with initial pay of ₹35,400 per month .
7. What is the selection process for CMA?
CBT-1 → CBT-2 → Document Verification → Medical Examination.
8. Is there a separate syllabus for CMA?
Yes, a separate CMA technical syllabus (Annexure-VIII (E)) has been added covering Physics and Chemistry at graduation level .
9. What chemistry topics should I prepare for CMA?
Atomic structure, periodic classification, chemical bonding, acids and bases, organic chemistry, environmental chemistry, and metallurgy at B.Sc. level .
10. Where can I apply?
Visit the official RRB application portal rrbapply.gov.in.
11. Is there negative marking?
Yes, 1/3 mark will be deducted for each wrong answer in both CBT-1 and CBT-2.
12. What medical standard is required for CMA?
B-2 Medical Standard as per railway rules .