(a) Fluid and Particle Dynamics
Viscosity of fluids. Laminar and turbulent flows. Equation of continuity and NavierStokes equition-Bernoulli’s theorem. Flow meters. Fluid drag and pressure drop due to friction, Reynold’s Number and friction factor – effect of pipe roughness. Economic pipe diameter. Pumps, water, air/steam jet ejectors, compressors, blowers and fans. Agitation and mixing of liquids. Mixing of solids and pastes. Crushing and Grinding – principles and equipment. Rittinger’s and Bond’s laws. Filtration and filtration equipment. Fluid-particle mechanics – free and hindered settling. Fluidisation and minimum fluidization velocity, concepts of compressible and incompressible flow. Transport of Solids.
(b) Mass Transfer
Molecular diffusion coefficients, First and second law and diffusion, mass transfer coefficients, film and penetration theories of mass transfer. Distillation, simple distillation, relative volatility, fractional distillation, plate and packed columns for distillation. Calculation of theoretical number of plates. Liquid-liquid equilibria. Extraction – theory and practice; Design of gas-absorption columns. Drying. Humidification, dehumidification. Crystallisation. Design of equipment.
(c) Heat Transfer
Conduction, thermal conductivity, extended surface heat transfer. Convection – free and forced. Heat transfer coefficients – Nusselt Number. LMTD and effectiveness. NTU methods for the design of Double Pipe and Shell & Tube Heat Exchangers. Analogy between heat and momentum transfer. Boiling and condensation heat transfer. Single and multiple-effect evaporators. Rediation – StefanBoltzman Law, emissivity and absorptivity. Calculation of heat load of a furnace. Solar heaters.
(d) Noval Separation Processes
Equilibrium separation processes – ion-exchange, osmosis, electro-dialysis, reverse osmosis, ultra-filtration and other membrane processes. Molecular distillation. super critical fluid extraction.
(e) Process Equipment Design
Factors affecting vessel design criteria – Cost considerations. Design of storage vessels-vertical, horizontal spherical, underground tanks for atmospheric and higher pressure. Design of closures flat and elliptical head. Design of supports. Materials of construction-characteristics and selection.
(f) Process Dynamics and Control
Measuring instruments for process variables like level, pressure, flow, temperature pH and concentration with indication in visual/pneumatic/analog/digital signal forms. Control variable, manipulative variable and load variables. Linear control theoryLaplace, transforms. PID controllers. Block diagram representation transient and frequency response, stability of closed loop system. Advanced control strategies. Computer based process control.
(a) Material and Energy Balances
Material and energy balance calculations in processes with recycle/bypass/purge. Combustion of solid/ liquid/gaseous fuels, stoichiometric relationships and excess air requirements. Adiabatic flame temperature.
(b) Chemical Engineering Thermodynamics
Laws of thermodynamics. PVT relationships for pure components and mixtures. Energy functions and inter-relationships – Maxwell’s relations. Fugacity, activity and chemical potential. Vapour-liquid equilibria, for ideal/non-ideal, single and multicomponent systems. criteria for chemical reaction equilibrium, equilibrium constant and equilibrium conversions. Thermodynamic cycles – refrigeration and power.
(c) Chemical Reaction Engineering :
Batch reactors – kinetics of homogeneous reactions and interpretation of kinetic data. Ideal flow reactors – CSTR, plug flow reactors and their performance equations. Temperature effects and run-away reactions. Heterogeneous reactions – catalytic and non-catalytic and gas-solid and gas-liquid reactions. Intrinsic kinetics and global rate concept. Importance of inter-phase and intra-particle mass transfer on performance. Effectiveness factor. Isothermal and non-isothermal reactors and reactor stability.
(d) Chemical Technology
Natural organic products – Wood and wood-based chemicals, pulp and paper, Agro industries – sugar, Edible oils extraction (including tree based seeds), Soaps and detergents. Essential oils – Biomass gasification (including biogas). Coal and coal chemical. Petroleum and Natural gas-Petroleum refining (Atomospheric distillation/cracking/reforming) – Petrochemical industries – Polyethylenes (LDPE/HDPE/LLDPE), Polyvinyl Chloride, Polystyrene. Ammonia manufacture. Cement and lime industries. Paints and varnishes. Glass and ceremics. Fermentation – alcohol and antibiotics.
(e) Environmental Engineering and Safety
Ecology and Environment. Sources of pollutants in air and water. Green house effect, ozone layer depletion, acid rain. Micrometeorology and dispersion of pollutants in environment. Measurement techniques of pollutant levels and their control strategies. Solid wastes, their hazards and their disposal techniques. Design and performance analysis of pollution control equipment. Fire and explosion hazards rating – HAZOP and HAZAN. Emergency planning, disaster management. Environmental legislations – water, air environment protection Acts. Forest (Conservation) Act.
(f) Process Engineering Economics :
Fixed and working capital requirement for a process industry and estimation methods. Cost estimation and comparison of alternatives. Net present value by discounted cash flow. Pay back analysis. IRR, Depreciation, taxes and insurance. Break-even point analysis. Project scheduling – PERT and CPM. Profit and loss account, balance sheet and financial statement. Plant location and plant layout including piping.
Papers III, IV, V and VI.—Any two subjects to be selected from the list of the optional subjects below. Each subject will have two papers.— 200 marks for each paper.
IFoS Preliminary Exam Date – 27th June, 2021 rescheduled to 10th October, 2021-IFoS Main Exam – November, 2021 ( Tentative )
For both writing and marking answers in the OMR sheet [Answer Sheet], candidates must use black ball pen
Download e-Admit card-No Admit Card will be sent by post-Preliminary and Main exam e-Admit card can be downloaded
Indian Forest Service Preliminary exam Fee is Rs.100/ -Main Exam Fee is Rs.100/-Female/SC/ST/Persons with Benchmark Disability Candidates are exempted from paying the exam fee.
Allotment of Centres will be on the “first‐apply‐first allot” basis, and once the capacity of a particular Centre is attained, the same will be frozen. The candidates should note that no request for change of Centre will be entertained.
Paper I General Studies ( Compulsory ) – 100 Questions-Objective Type – multiple choice questions – 200 Marks (2 Hours duration )-Negative Marking-0.33 Marks will be deducted
Civil Services (Preliminary) Examination, separate lists will be prepared for the candidates eligible to appear in the Civil Service (Main)-based on the criterion of minimum qualifying marks of 33% in General Studies Paper-II of Civil Services (Preliminary) Examination
Indian Forest Service Vacancies – 110 (approximately)
Age Limits-Educational Qualification-Number of attempts-Restricted Candidates-Medical and Physical Standards
Last date for filling online Application is 24th March, 2021-withdraw Application-IFoS Main Exam Application form will be called in the month of August, 2021 (Tentative)