Published on Mar 09, 2021
Gate 2021 Aerospace Engineering Syllabus AE : https://gate.iitb.ac.in : Graduate Aptitude Test in Engineering (GATE) is a national examination, conducted jointly by Indian Institute of Science (IISc) Bangalore and seven Indian Institutes of Technology (IITs) at Bombay, Delhi, Guwahati, Kanpur, Kharagpur, Madras and Roorkee on behalf of National Coordination Board (NCB)-GATE, Department of Higher Education, Ministry of Education (MoE), Government of India. GATE examination is a Computer Based Test (CBT).
GATE 2021 will be conducted for 27 Subjects (also referred to as “papers”).
GATE 2021 examination will be conducted over six days and twelve sessions on Friday 5th, Saturday 6th, Sunday 7th, Friday 12th, Saturday 13th and Sunday 14th of February 2021.
Core Topics:
Linear Algebra: Vector algebra, Matrix algebra, systems of linear equations, rank of a matrix, eigenvalues and eigenvectors.
Calculus: Functions of single variable, limits, continuity and differentiability, mean value theorem, chain rule, partial derivatives, maxima and minima, gradient, divergence and curl, directional derivatives. Integration, Line, surface and volume integrals. Theorems of Stokes, Gauss and Green.
Differential Equations: First order linear and nonlinear differential equations, higher order linear ODEs with constant coefficients. Partial differential equations and separation of variables methods.
Special Topics: Fourier Series, Laplace Transforms, Numerical methods for linear and nonlinear algebraic equations, Numerical integration and differentiation. Complex analysis. Probability and statistics.
Core Topics: Basics
Atmosphere: Properties, standard atmosphere. Classification of aircraft. Airplane (fixed wing aircraft) configuration and various parts. Pressure altitude; equivalent, calibrated, indicated air speeds; Primary flight instruments: Altimeter, ASI, VSI, Turn-bank indicator. Angle of attack, sideslip; Roll, pitch & yaw controls. Aerodynamic forces and moments.
Airplane performance: Drag polar; takeoff and landing; steady climb & descent; absolute and service ceiling; range and endurance, load factor, turning flight, V-n diagram. Winds: head, tail & cross winds.
Static stability: Stability & control derivatives; longitudinal stick fixed & free stability; horizontal tail position and size; directional stability, vertical tail position and size; lateral stability. Wing dihedral, sweep & position; hinge moments, stick forces.
Special Topics: Dynamic stability: Euler angles; Equations of motion; Decoupling of longitudinal and lateral-directional dynamics; longitudinal modes; lateral-directional modes.
Core Topics:
Central force motion, determination of trajectory and orbital period in simple cases. Kepler’s laws; escape velocity.
No Special Topics:
Core Topics:
Basic Fluid Mechanics: Conservation laws: Mass, momentum and energy (Integral and differential form); Dimensional analysis and dynamic similarity;
Potential flow theory: sources, sinks, doublets, line vortex and their superposition. Elementary ideas of viscous flows including boundary layers. Airfoils and wings: Airfoil nomenclature; Aerodynamic coefficients: lift, drag and moment; Kutta- Joukoswki theorem; Thin airfoil theory, Kutta condition, starting vortex; Finite wing theory: Induced drag, Prandtl lifting line theory; Critical and drag divergence Mach number.
Compressible Flows: Basic concepts of compressibility, One-dimensional compressible flows, Isentropic flows, Fanno flow, Rayleigh flow; Normal and oblique shocks, Prandtl-Meyer flow; Flow through nozzles and diffusers.
Special Topics: Wind Tunnel Testing: Measurement and visualization techniques. Shock - boundary layer interaction.
Core Topics:
Strength of Materials: Stress and strain: Three-dimensional transformations, Mohr's circle, principal stresses, Three-dimensional Hooke's law, Plane stress and strain. Failure theories: Maximum stress, Tresca von Mises. Strain energy. Castigliano's principles. Statically determinate and indeterminate trusses and beams. Elastic flexural buckling of columns.
Flight vehicle structures: Characteristics of aircraft structures and materials. Torsion, bending and shear of thin-walled sections. Loads on aircraft.
Structural Dynamics: Free and forced vibrations of undamped and damped SDOF systems. Free vibrations of undamped 2-DOF systems.
Special Topics: Vibration of beams. Theory of elasticity: Equilibrium and compatibility equations, Airy’s stress function.
Core Topics:
Basics: Thermodynamics, boundary layers, heat transfer, combustion and thermochemistry. Aerothermodynamics of aircraft engines: Thrust, efficiency, range. Brayton cycle.
Engine performance: ramjet, turbojet, turbofan, turboprop and turboshaft engines. Afterburners. Turbomachinery: Axial compressors: Angular momentum, work and compression, characteristic
performance of a single axial compressor stage, efficiency of the compressor and degree of reaction, multi-staging.
Centrifugal compressor: Stage dynamics, inducer, impeller and diffuser.
Axial turbines: Stage performance.
Rockets: Thrust equation and specific impulse, rocket performance. Multi-staging. Chemical rockets. Performance of solid and liquid propellant rockets.
Special Topics: Aerothermodynamics of non-rotating propulsion components such as intakes, combustor and nozzle. Turbine blade cooling. Compressor-turbine matching, Surge and stall.
A candidate may appear either in ONE or TWO subject papers. For candidates who choose TWO papers, the combination must be from the approved list of combinations and subject to the availability of infrastructure and date.
Environmental Science and Engineering (ES) and Humanities and Social Sciences (XH) are two new papers introduced in GATE-2021.
Pattern of Examination
Particulars |
Details |
Examination Mode |
Computer Based Test (CBT) |
Duration |
3 Hours |
Number of Subjects (Papers) |
27 |
Sections |
General Aptitude (GA) + Candidate’s Selected Subject |
Type of Questions |
|
Questions test these abilities |
|
Number of Questions |
10 (GA) + 55 (subject) = 65 Questions |
Distribution of Marks in all Papers EXCEPT papers AR, CY, EY, GG, MA, PH, XH and XL |
General Aptitude: 15 Marks + Engineering Mathematics: 13 Marks + Subject Questions: 72 Marks = Total: 100 Marks |
Distribution of Marks in papers AR, CY, EY, GG, MA, PH, XH and XL |
General Aptitude: 15 Marks + Subject Questions: 85 Marks = Total: 100 Marks |
Marking Scheme |
All of the questions will be of 1 mark or 2 marks |
Paper Code |
General Aptitude (GA) Marks |
Subject Marks |
Total Marks |
Total Time (Minutes) |
AE, AR, AG, BT, CE, CH, CS, CY, EC, EE, ES, EY, IN, MA, ME, MN, MT, PE, PH, PI, TF, ST and BM |
15 |
85 |
100 |
180 |
GG [Part A + Part B (Section 1 Geology OR Section 2 Geophysics)] |
15 |
25 + 60 |
100 |
180 |
XE (Section A + Any TWO Sections) |
15 |
15 + (2 x 35) |
100 |
180 |
XH (Section B1 + Any ONE Section) |
15 |
25 + (1 x 60) |
100 |
180 |
XL (Section P + Any TWO Sections) |
15 |
25 + (2 x 30) |
100 |
180 |
Candidates opting to appear in TWO subject papers must have a primary choice of paper, which will be their default choice and second choice of paper, which has to be chosen from the allowed combinations. Combinations other than the listed ones are NOT allowed. Under unforeseen circumstances, GATE 2021 committee has the rights to remove certain combinations at a later date. In such case, the fee paid towards the second paper will be refunded to the candidates. Also note that the examination centre for candidate to appear for the second paper may be different (but in same city) from that for the first paper due to the infrastructure and scheduling constraints. GATE committee is NOT liable for any legal obligations related to this issue.
