This article talks about, Syllabus and Exam Pattern of IOCL Junior Engineer 2025 and other related details.

Indian Oil Corporation Limited (IOCL) has released the notification for the Junior Engineer / Officer (Grade E0) recruitment in 2025.

Candidates interested in this job (Diploma Engineers in Electrical, Mechanical, Chemical, Instrumentation) must understand the syllabus and exam format clearly to prepare well.

Exam Pattern

Here’s how the selection exam is structured: 

Syllabus

The syllabus has two parts: Domain-Specific (technical) and General Aptitude. Here are the main topics: 

1. Domain-Specific Syllabus (Based on Discipline)

• Electrical Engineering
  Topics like Electrical Machines, Circuit Theory, Power Transmission/Distribution, Control Systems, Measurements & Instrumentation, etc.
• Mechanical Engineering
  Things like Thermodynamics, Fluid Mechanics, Strength of Materials, Theory of Machines, Heat Transfer, Manufacturing Processes
• Chemical Engineering
  Includes Process Calculations, Heat & Mass Transfer, Fluid Mechanics, Chemical Technology, Instrumentation basics, Safety & Environment
• Instrumentation Engineering
  Topics like Sensors & Transducers, Process Control, Measurement Techniques, Analog & Digital Electronics, Control Systems

2. General Sections

These are common for all candidates: 

• Quantitative Aptitude: Arithmetic, Algebra, Geometry, Data Interpretation
• Logical Reasoning: Puzzles, Series, Syllogisms, etc.
• Verbal Ability / English: Grammar, Comprehension, Vocabulary, Sentence Correction

Tips for Preparation

• Focus heavily on domain technical subjects since half the paper (50 questions) is from the candidate’s engineering discipline.
• Practice aptitude and reasoning sections regularly to avoid losing easy marks.
• Work on speed and accuracy especially because there’s negative marking.
• Solve previous year IOCL JE papers or sample questions to understand question style.
• Make short notes/formulas for technical subjects for quick revision.
• Attempt mock tests under timed conditions.