Engineer via GATE (Chemical, Mech, EE, Civil)
Roles hiring
₹6–9 LPA
Typical package
990+
Questions
What IOCL asks — practise by section
Chemical Core
Transport, heat & mass transfer, CRE, thermo
Process Design
Aspen, P&ID, equipment, HAZOP, piping, codes
Plant Operations
Refinery, petrochem, PSM, HSE, reliability
Most-asked topics
Refinery & Petrochemical Processes (30)Pharma & Specialty Chemicals (30)Process Safety Management (30)HSE & Regulatory (30)Quality & Laboratory (30)Maintenance & Reliability (30)Utilities & Offsites (30)P&ID, PFD & Documentation (30)HAZOP & Process Safety (30)Process Control Design (30)Reactor Design & Scale-up (30)Fluid Mechanics & Transport (27)Heat Transfer (27)Mass Transfer (27)Chemical Reaction Engineering (27)Chemical Engineering Thermodynamics (27)Process Control Basics (27)Mechanical Operations (27)
Department hub: Chemical engineering interview questions
Interview process
- 1GATE score (85% weight, typically 800+)
- 2Group discussion / group task
- 3Personal interview (15% with GD): mass transfer, exchangers, CRE, refinery flow, HAZOP
- 4Medical + posting