RRB ALP CBT 2 Part B Syllabus

The RRB ALP CBT 2 Part B is the trade-specific qualifying section of the ALP 2027 examination. It consists of 75 questions carrying 75 marks in 60 minutes and is conducted immediately after Part A on the same examination day. Part B tests candidates on the technical knowledge of their ITI trade or engineering discipline at the NCVT ITI certificate level.

Part B is qualifying in nature: candidates must score a minimum of 35% (26.25 marks out of 75) to pass. The marks scored in Part B are NOT added to the final merit list. Final ALP merit is determined exclusively by Part A scores. Candidates who fail Part B are disqualified from further selection stages.

Quick Facts: CBT 2 Part B

Detail	Information
Part	Part B (Trade-specific Qualifying Section)
Questions	75
Marks	75
Duration	60 Minutes
Negative Marking	1/3 mark per wrong answer
Qualifying Marks	Minimum 35% -- 26.25 marks out of 75
Merit Use	NOT counted in final merit list
Basis	NCVT ITI curriculum for the relevant trade
Applicable Posts	ALP and Technician (both must clear Part B)

Eligible Trades for ALP Part B

The CISCE prescribes a list of eligible trades for each ALP post. Candidates must hold an ITI certificate (NCVT/SCVT) in one of the notified trades or a Diploma/Degree in the relevant engineering discipline as specified in the official notification. Part B is taken in the trade/discipline of the candidate's ITI certificate or engineering qualification.

Trade	NCVT Code	Duration	Relevant ALP Post Qualification
Electrician	219	2 Years	Most common trade for ALP; covers electrical fundamentals relevant to traction
Fitter	217	2 Years	Mechanical fitting; relevant for loco and rolling stock maintenance
Turner	218	2 Years	Lathe and machining; relevant for workshop and manufacturing departments
Machinist	245	2 Years	CNC and conventional machining; relevant for railway workshops
Welder	221	1 Year	Welding processes; relevant for bridge and construction maintenance
Wireman	226	2 Years	Domestic and industrial wiring; relevant for station electrical maintenance
Refrigeration and AC Mechanic	225	2 Years	Refrigeration and air conditioning; relevant for coach AC maintenance
Mechanic Motor Vehicle	244	2 Years	Vehicle maintenance; relevant for motor transport department
Electronic Mechanic	227	2 Years	Electronics and communication; relevant for S&T department
Instrument Mechanic	234	2 Years	Instrumentation and control; relevant for technical measurement roles

Part B Question Pattern

The 75 Part B questions test the following types of knowledge drawn from the ITI trade curriculum:

• Trade Theory: principles, definitions, classification, and technical concepts of the trade

• Applied Calculations: numerical problems using formulae relevant to the trade (circuit calculations, machining calculations, refrigeration cycle calculations, etc.)

• Tools and Equipment: identification, specifications, uses, and maintenance of tools and equipment used in the trade

• Workshop Processes: sequence of operations; process selection; quality checks; common defects and their causes

• Materials and Standards: trade-relevant materials; IS/BIS standards and codes applicable to the trade

• Safety: trade-specific safety rules; PPE for the trade; first aid in trade context; IS safety standards

• Trade Mathematics: calculations specific to the trade at ITI level

How to Prepare for Part B

1. Primary Source: NCVT ITI Trade Theory Textbooks

The NCVT-prescribed trade theory textbooks published by DGT (Directorate General of Training) or state ITI boards are the most accurate and examination-aligned source for Part B. Read every chapter, noting definitions, formulae, IS codes, safety rules, and process steps.

2. Focus on Factual and Numerical Content

Part B MCQs tend to test specific facts, standard values, formulae, and IS code provisions. Memorise standard values (e.g., permissible voltage levels, standard wire gauges, melting points of materials, refrigerant properties, welding electrode specifications) as these are commonly tested.

3. Solve Trade-Specific Question Banks

Solve previous years' RRB ALP Part B question banks for your specific trade. These are available from major competitive examination publishers. Previous paper analysis reveals the proportion of questions from each chapter and the most frequently tested topics.

4. Do Not Neglect Part B Until Part A Preparation is Complete

A common mistake is to start Part B preparation only after covering Part A. Since both must be cleared on the same examination day, start Part B revision from Day 1 of your preparation with a daily allocation of 30 to 45 minutes for trade theory.

Trade Syllabus Pages

Navigate to the individual trade page for complete chapter-wise and topic-wise syllabus details:

Trade Syllabus Page	Core Technical Areas
RRB ALP Electrician Trade Syllabus	Electrical Fundamentals, Wiring, Machines, Protection, Measurement
RRB ALP Fitter Trade Syllabus	Benchwork, Fitting, Machining, Measurement, Assembly, Quality
RRB ALP Turner Trade Syllabus	Lathe, Cutting Tools, Measurement, Grinding, Advanced Turning
RRB ALP Machinist Trade Syllabus	Conventional and CNC Machining, Cutting Theory, Metrology
RRB ALP Welder Trade Syllabus	Arc Welding, Gas Welding, MIG/TIG, Metallurgy, Safety, Inspection
RRB ALP Wireman Trade Syllabus	Wiring, Cables, Earthing, Safety, Domestic and Industrial Circuits
RRB ALP Refrigeration and AC Mechanic Syllabus	Refrigeration Cycle, Compressors, Refrigerants, AC Systems, Troubleshooting
RRB ALP Mechanic Motor Vehicle Syllabus	IC Engines, Transmission, Brakes, Fuel Systems, Electrical, Emission
RRB ALP Electronic Mechanic Syllabus	Electronic Devices, Digital Circuits, Communication, PCB, Microcontrollers
RRB ALP Instrument Mechanic Syllabus	Measurement, Transducers, Process Control, Calibration, Industrial Instruments

Frequently Asked Questions: Part B

Q1. Can a candidate choose any trade for Part B?

No. Part B is taken in the trade or engineering discipline of the candidate's ITI certificate or engineering qualification as declared in the application form. Candidates cannot choose a different trade at the time of the examination.

Q2. Is 35% qualifying marks easy to achieve in Part B?

For candidates who have completed their ITI in the relevant trade and done basic revision, 35% is achievable. However, candidates who have not revised their trade material or have forgotten key concepts may find it challenging. Consistent preparation is essential.

Q3. Is the Part B syllabus available officially?

The NCVT ITI syllabus for each trade published by the Directorate General of Training (DGT) is the official reference for Part B content. The RRB notification also specifies the eligible trades for each post. Both documents should be referred to together.