Agricultural Engineering is the study of soil, fertilizer, farm machinary and equipments for the improvement in the techniques used in farming.
Following is the syllabus for Gate Exam for Agricultural Engineering:
Linear Algebra: Matrices and Determinants, Systems of linear equations, Eigen values and eigen vectors.
Calculus: Limit, continuity and differentiability; Partial Derivatives; Maxima and minima; Sequences and series; Test for
convergence; Fourier series.
Vector Calculus: Gradient; Divergence and Curl; Line; surface and volume integrals; Stokes, Gauss and Green's theorems.
Differential Equations: Linear and non-linear first order ODEs; Higher order linear ODEs with constant coefficients; Cauchy's
and Euler's equations; Laplace transforms; PDEs - Laplace, heat and wave equations.
Probability and Statistics: Mean, median, mode and standard deviation; Random variables; Poisson, normal and binomial
distributions; Correlation and regression analysis.
Numerical Methods: Solutions of linear and non-linear algebraic equations; integration of trapezoidal and Simpson's rule;
single and multi-step methods for differential equations.
FARM MACHINERY AND POWER
Sources of power on the farm-human, animal, mechanical, electrical, wind, solar and biomass; bio-fuels; design and selection
of machine elements - gears, pulleys, chains and sprockets and belts; overload safety devices used in farm machinery;
measurement of force, torque, speed, displacement and acceleration on machine elements.
Soil tillage; forces acting on a tillage tool; hitch systems and hitching of tillage implements; mechanics of animal
traction; functional requirements, principles of working, construction and operation of manual, animal and power operated
equipment for tillage, sowing, planting, fertilizer application, inter-cultivation, spraying, mowing, chaff cutting,
harvesting, threshing and transport; testing of agricultural machinery and equipment; calculation of performance parameters
-field capacity, efficiency, application rate and losses; cost analysis of implements and tractors
Thermodynamic principles of I.C. engines; I.C. engine cycles; engine components; fuels and combustion; lubricants and their
properties; I.C. engine systems - fuel, cooling, lubrication, ignition, electrical, intake and exhaust; selection, operation,
maintenance and repair of I.C. engines; power efficiencies and measurement; calculation of power, torque, fuel consumption,
heat load and power losses.
Tractors and power tillers - type, selection, maintenance and repair; tractor clutches and brakes; power transmission systems
- gear trains, differential, final drives and power take-off; mechanics of tractor chassis; traction theory; three point
hitches- free link and restrained link operations; mechanical steering and hydraulic control systems used in tractors; human
engineering and safety in tractor design; tractor tests and performance.
SOIL AND WATER CONSERVATION ENGINEERING
Ideal and real fluids, properties of fluids; hydrostatic pressure and its measurement; hydrostatic forces on plane and
curved surface; continuity equation; Bernoulli's theorem; laminar and turbulent flow in pipes, Darcy- Weisbach and
Hazen-Williams equations, Moody's diagram; flow through orifices and notches; flow in open channels.
Engineering properties of soils; fundamental definitions and relationships; index properties of soils; permeability and
seepage analysis; shear strength, Mohr's circle of stress, active and passive earth pressures; stability of slopes.
Hydrological cycle; meteorological parameters and their measurement, analysis of precipitation data; abstraction from
precipitation; runoff; hydrograph analysis, unit hydrograph theory and application; stream flow measurement; flood routing,
hydrological reservoir and channel routing.
Measurement of distance and area; chain surveying, methods of traversing; measurement of angles and bearings, plane table
surveying; types of levelling; contouring; instruments for surveying and levelling; computation of earth work.
Mechanics of soil erosion, soil erosion types; wind and water erosion; factors affecting erosion; soil loss estimation;
biological and engineering measures to control erosion; terraces and bunds; vegetative waterways; gully control structures,
drop, drop inlet and chute spillways; earthen dams; water harvesting structures, farm ponds, watershed management.
Soil-water-plant relationship, water requirement of crops; consumptive use and evapotranspiration; irrigation scheduling;
irrigation efficiencies; design of irrigation channels; measurement of soil moisture, irrigation water and infiltration;
surface, sprinkler and drip methods of irrigation; design and evaluation of irrigation methods.
Drainage coefficient; planning, design and layout of surface and sub-surface drainage systems; leaching requirement and
salinity control; irrigation and drainage water quality.
Groundwater occurrence confined and unconfined aquifers, evaluation of aquifer properties; well hydraulics; groundwater
Classification of pumps; pump characteristics; pump selection and installation.
AGRICULTURAL PROCESSING AND FOOD ENGINEERING
Steady state heat transfer in conduction, convection and radiation; transient heat transfer in simple geometry; condensation
and boiling heat transfer; working principles of heat exchangers; diffusive and convective mass transfer; simultaneous heat
and mass transfer in agricultural processing operations.
Material and energy balances in food processing systems; water activity, sorption and desorption isotherms; centrifugal
separation of solids, liquids and gases; kinetics of microbial death - pasteurization and sterilization of liquid foods;
preservation of food by cooling and freezing; refrigeration and cold storage basics and applications; psychrometry -
properties of air-vapour mixture; concentration and drying of liquid foods - evaporators, tray, drum and spray dryers.
Mechanics and energy requirement in size reduction of granular solids; particle size analysis for comminuted solids; size
separation by screening; fluidization of granular solids-pneumatic, bucket, screw and belt conveying; cleaning and grading;
Effectiveness of grain cleaners.
Hydrothermal treatment, drying and milling of cereals, pulses and oilseeds; Processing of seeds, spices, fruits and
vegetables; By-product utilization from processing industries.
Controlled and modified atmosphere storage; Perishable food storage, godowns, bins and grain silos.
For more information refer: http://gate.iitk.ac.in/