1. Introduction about the exam 🧭

The Indian Oil Corporation Limited (IOCL) is India’s largest commercial oil company, engaged across the value chain of petroleum business including exploration, refining, pipelines, marketing and petrochemicals. In 2026, IOCL plans to conduct major recruitment drives for disciplines such as Engineers/Officers (Grade A) via valid exam scores (such as from GATE 2026 in relevant engineering branches) and for non-executive posts (Junior Operator, Junior Attendant, Junior Business Assistant and others) via direct Computer Based Test (CBT). Official notifications are published on IOCL’s careers portal. IOCL+2IOCL+2
Key SEO phrases: “IOCL recruitment 2026”, “IOCL syllabus 2026”, “IOCL exam pattern”, “IOCL preparation”.

2. Selection Process ✅

The selection process for IOCL recruitment 2026 varies depending on the category of the post:

For Engineers/Officers (Grade A) via GATE 2026:
- Qualify GATE in the relevant discipline.
- Apply online on IOCL official site (www.iocl.com). IOCL+1
- Shortlisting of candidates based on GATE score + discipline eligibility + application details.
- Possibly Group Discussion (GD) / Group Task (GT) / Personal Interview (PI) for some posts (check notification).
- Medical & final appointment.
For Non-executive posts (Junior Operator Grade I, Junior Attendant, Junior Business Assistant etc):
- Online CBT (objective MCQs) followed by Skill/Proficiency/Physical Test (SPPT) or Computer Proficiency Test (CPT) as applicable. IOCL+1
- Document verification & medical fitness.
- Final merit list drawn category-wise. IOCL

3. Exam Pattern with tables 📘

Here we present typical exam patterns for two major categories based on the latest official notification.

3.1 Engineers/Officers (Grade A) via GATE 2026

Stage	Mode	Details
GATE 2026 Paper	Online (conducted by IIT)	Valid in specified discipline for IOCL.
Shortlisting on GATE score	—	Discipline wise merit list.
GD / GT / PI (if applicable)	In-person / online	As specified in notification.
Medical fitness & final offer	—	As per IOCL norms.

3.2 Non-Executive Posts (Sample: Junior Operator Grade I / Junior Attendant / Junior Business Assistant)

Based on official PDF advertisement by IOCL. IOCL+1

Example: Junior Operator (Grade I)

Section	No. of Questions	Marks	Duration
Professional Knowledge / General Science	50	50	120 minutes
Numerical Ability	20	20
Reasoning Ability	20	20
General Awareness	10	10
Total	100	100	120 min

Example: Junior Business Assistant (Grade III)

Section	No. of Questions	Marks	Duration
Numerical Ability	40	40	120 min
Reasoning Ability	30	30
General Awareness	20	20
Basic English Language Skills	10	10
Total	100	100	120 min

Negative marking: For the non-executive posts example above, there is no penalty (no negative marking) for wrong answers in these posts. IOCL+1
Bilingual test provision: Tests are bilingual (English & Hindi) except English language section. IOCL

4. Detailed Section-wise Syllabus 🎯

a) Discipline/Professional Knowledge (for Engineers/Officers)

For each branch of engineering (Chemical, Civil, Electrical, Mechanical, Metallurgical, Instrumentation, etc), syllabus includes core technical subjects:

Chemical Engineering: Process Calculations, Chemical Reaction Engineering, Transport Phenomena, Plant Design, Petrochemicals.
Civil Engineering: Structural Analysis, RCC/Steel Design, Environmental Engineering, Construction Technology, Hydraulics.
Electrical Engineering: Circuit Theory, Electrical Machines, Power Systems, Control Systems.
Mechanical Engineering: Thermodynamics, Fluid Mechanics, Heat Transfer, Machine Design, Power Plants.
Instrumentation / Metallurgy: Measurement Systems, Material Science, Manufacturing Processes.
Eligible disciplines for IOCL via GATE 2026 include those specified in notification.

b) Numerical Ability & Quantitative Aptitude

Number systems, Percentages, Ratio & Proportion, Profit & Loss, Time & Work, Data Interpretation.
Aimed at measuring computation speed and accuracy.

c) Reasoning Ability & Logical Aptitude

Verbal & Non-Verbal Reasoning, Analogy, Classification, Series, Venn Diagrams, Coding-Decoding.
Analytical reasoning based on data, patterns.

d) General Awareness & Current Affairs

Indian economy, energy sector, oil & gas industry basics (relevant to IOCL)
National & international current affairs, environment & ecology, science & technology.
General Science (for non-technical posts) and everyday applications.

e) Basic English Language Skills

Grammar: Tenses, Subject-Verb Agreement, Modals, Voice & Narration.
Vocabulary: Synonyms, Antonyms, One‐word Substitution.
Reading Comprehension passages.
For non-executive posts: Basic English language section (e.g., 10 marks for Junior Business Assistant) as seen in pattern. IOCL

f) Technical/Trade specific (for non-executive posts)

For Junior Operator / Junior Attendant: Professional knowledge or general science relevant to trade. IOCL
For Business Assistant: Basic computer proficiency, English comprehension, office aptitude.

5. Final Selection Process with Marks Weightage 🧮

For Engineers/Officers (Grade A): Merit is primarily based on GATE score + discipline eligibility + application credentials. Interview or GD/GT (if applicable) may form part of final selection. (Exact weightage will be defined in the notification.)
For Non-executive posts:
- CBT marks constitute 100% of merit for shortlist. For example, IOCL official document states selection by descending order of CBT marks for those ‘Fit’ in SPPT/CPT. IOCL
- SPPT/CPT (skill/proficiency test) is qualifying in nature (no marks added) in many cases. IOCL
- Final merit list is state-wise / post-wise / category-wise based on CBT marks of candidates who meet SPPT/CPT criteria. IOCL

Example: For the Junior Operator post, qualifying cut-offs: Sectional min marks + overall min marks in CBT. IOCL

6. Practical Preparation Tips 📝

Carefully read the official notification on IOCL’s careers page (www.iocl.com) for your specific post — details differ by discipline and category.
Start from core technical subjects if you are applying as Engineer/Officer (Grade A). Make sure you align with the eligible disciplines (as per GATE code or notification).
Solve previous year question papers and mock tests, especially timed full-length tests to improve speed & accuracy.
Focus on general sections (Reasoning, Numerical, General Awareness, English) which are common across many posts.
Pay attention to negative marking rules: For many non-executive posts there is no negative marking; but always verify for your post.
Prepare for SPPT/CPT if applicable: For non-executive posts may include computer proficiency or skill/proficiency module — practice accordingly.
Stay updated in industry: For IOCL especially, knowing about the oil & gas sector, recent developments, IOCL’s operations can help in interviews or GD/GT.
Maintain documentation readiness: Ensure you meet age, qualification, discipline criteria, caste certificate (if applicable), physical fitness guidelines. For example, in one notification age limit for general category was 26 years. IOCL
Revision & time management: Keep revision sheets for formulas, key concepts, terminology and practice daily.
Health & exam day readiness: Check exam centre, login instructions, print admit-card, keep original photo ID, arrive early. IOCL emphasises adherence to instructions. IOCL+1

7. Useful Resource links 🔗

Official IOCL Careers portal: www.iocl.com – Latest Job Opening / Advertisement section. IOCL+1
Specific advertisement PDFs: Example for Engineers/Officers advertisement: PDF on official site. IOCL
Sample recruitment notification for non-executive post with CBT structure: PDF on official site. IOCL+1

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🛢️ Indian Oil Corporation Limited (IOCL) Recruitment 2026