GATE CH study guide
GATE CH · Work through your exam, one topic at a time.
GATE (Graduate Aptitude Test in Engineering) is a national-level examination that primarily tests the comprehensive understanding of various undergraduate subjects in Engineering/Technology/Architecture/Science/Commerce/Arts/Humanities. The CH test paper is the Chemical Engineering paper within this family of 30 test papers, which comprise full papers and sectional papers. The GATE CH study guide has 9 sections and about 3,333 words.
01Engineering Mathematics
Engineering Mathematics carries roughly 13 marks in GATE CH and is the most predictable domain: the questions are short, closed-form, and drawn from linear algebra, calculus, differential equations, probability and numerical methods. For a 2×2 matrix, λ₁+λ₂ = trace and λ₁λ₂ = det - often faster than expanding the characteristic polynomial.
339 words, about 2 min02Process Calculations and Thermodynamics
This domain merges stoichiometric bookkeeping (balances with recycle, bypass and purge) with classical chemical thermodynamics (first and second laws, equations of state, phase and reaction equilibrium). The questions are numerical and reward a cleanly chosen basis.
401 words, about 2 min03Fluid Mechanics and Mechanical Operations
Fluid mechanics and mechanical operations is the most formula-dense part of GATE CH, and much of its marks come from one correct substitution into the right correlation. It covers statics, pipe flow and friction, pumps, metering, packed and fluidised beds, settling, filtration and size-reduction equipment.
352 words, about 2 min04Heat Transfer
Heat transfer questions in GATE CH split into conduction (fins, resistance networks, lumped capacitance), convection (dimensionless groups and correlations), radiation (view factors, shields) and exchanger design (LMTD and effectiveness–NTU). Expect at least one exchanger sizing item.
344 words, about 2 min05Mass Transfer
Mass transfer covers diffusion, interphase transfer with overall coefficients, and the separation equipment built on them: absorption, distillation, extraction, drying and adsorption. Exam items are usually staged-column or flux calculations where the driving force must be chosen consistently.
390 words, about 2 min06Chemical Reaction Engineering
Reaction engineering turns kinetics into reactor volume and product distribution. GATE CH tests design equations for batch, CSTR and PFR, multiple-reaction selectivity, non-isothermal energy balances, heterogeneous catalysis with pore diffusion, and residence-time distributions.
390 words, about 2 min07Instrumentation and Process Control
This domain pairs measurement hardware with dynamic analysis and controller tuning. Marks come from sensors (thermocouple, RTD, orifice, DP cell), from first- and second-order dynamics, and from stability tools (Routh, Bode, root locus) applied to closed loops.
401 words, about 2 min08Plant Design and Economics
Plant design and economics tests whether you can cost equipment, capitalise a plant and judge whether a project is worth building. Expect cost estimation rules, depreciation, profitability measures and one or two optimisation or safety items.
369 words, about 2 min09Chemical Technology
Chemical technology is a memory-linked domain: each question pairs a product with its feedstock, catalyst, operating window and the reason for each. GATE CH draws mostly on chlor-alkali, sulphuric and nitric acid, ammonia and urea, methanol, petroleum refining and the main petrochemicals.
347 words, about 2 min