Wednesday, October 3, 2012

GATE 2013 Aerospace Engineering (AE) Syllabus

ENGINEERING MATHEMATICS

Linear Algebra: Matrix algebra, systems of linear equations, eigen values and eigen vectors.

Calculus: Functions of single variable, limit, continuity and differentiability, mean value theorems, evaluation of definite and improper integrals, partial derivatives, total derivative, maxima and minima, gradient, divergence and curl, vector identities, directional derivatives, line, surface and volume integrals. Theorems of Stokes, Gauss and Green.


Differential Equations: First order linear and nonlinear equations, higher order linear ODEs with constant coefficients, Cauchy and Euler equations, initial and boundary value problems,Laplace transforms. Partial differential equations and separation of variables methods.

Numerical methods: Numerical solution of linear and nonlinear algebraic equations, integration by trapezoidal and Simpson rule, single and multi-step methods for differential equations.
FLIGHT MECHANICS

Atmosphere: Properties, standard atmosphere. Classification of aircraft.Airplane (fixed wing aircraft) configuration and various parts.

Airplane performance: Pressure altitude; equivalent, calibrated, indicated air speeds; Primary flight instruments: Altimeter, ASI, VSI, Turn-bank indicator. Drag polar; take off and landing; steady climb & descent,-absolute and service ceiling; cruise, cruise climb, endurance or loiter; load factor, turning flight, V-n diagram; Winds: head, tail & cross winds.

Static stability: Angle of attack, sideslip; roll, pitch & yaw controls; longitudinal stick fixed & free stability, horizontal tail position and size; directional stability, vertical tail position and size; dihedral stability. Wing dihedral, sweep & position; hinge moments, stick forces.

Dynamic stability: Euler angles; Equations of motion; aerodynamic forces and moments, stability & control derivatives; decoupling of longitudinal and lat-directional dynamics; longitudinal modes; lateral-directional modes.
SPACE DYNAMICS

Central force motion, determination of trajectory and orbital period in simple cases. Orbit transfer, in-plane and out-of-plane. Elements of rocket motor performance.
AERODYNAMICS

Basic Fluid Mechanics: Incompressible irrotational flow, Helmholtz and Kelvin theorem, singularities and superposition, viscous flows, boundary layer on a flat plate.

Airfoils and wings: Classification of airfoils, aerodynamic characteristics, high lift devices, Kutta Joukowski theorem; lift generation; thin airfoil theory; wing theory; induced drag; qualitative treatment of low aspect ratio wings.

Viscous Flows: Flow separation, introduction to turbulence, transition, structure of a turbulent boundary layer.

Compressible Flows: Dynamics and Thermodynamics of I-D flow, isentropic flow, normal shock, oblique shock, Prandtl-Meyer flow, flow in nozzles and diffusers, inviscid flow in a c-d nozzle, flow in diffusers. subsonic and supersonic airfoils, compressibility effects on lift and drag, critical and drag divergence Mach number, wave drag.

Wind Tunnel Testing: Measurement and visualisation techniques.
STRUCTURES

Stress and Strain: Equations of equilibrium, constitutive law, strain-displacement relationship, compatibility equations, plane stress and strain, Airy’s stress function.

Flight Vehicle Structures: Characteristics of aircraft structures and materials, torsion, bending and flexural shear. Flexural shear flow in thin-walled sections. Buckling. Failure theories. Loads on aircraft.

Structural Dynamics: Free and forced vibration of discrete systems. Damping and resonance. Dynamics of continuous systems.
PROPULSION

Thermodynamics of Aircraft Gas Turbine engines, thrust and thrust augmentation.

Turbomachinery: Axial compressors and turbines, centrifugal pumps and compressors.

Aerothermodynamics of non rotating propulsion components: Intakes, combustor and nozzle. Thermodynamics of ramjets and scramjets. Elements of rocket propulsion.

GATE 2013 General Aptitude (GA) Syllabus

Syllabus for General Aptitude (GA)  (COMMON TO ALL)

Verbal  Ability: English grammar, sentence completion, verbal analogies, word groups, instructions, critical reasoning and verbal deduction.

Numerical Ability: Numerical computation, numerical estimation, numerical reasoning and data interpretation.

Sample Questions


Verbal  Ability

Q.1. Choose the appropriate answer to complete the following sentence:

After several ……. attempts to send the missile into space, the spacecraft was finally launched successfully.

(A)     abortive   (B)     difficult   (C)     experimental   (D)     preliminary

Ans. (A)

Q.2. Choose the appropriate answer to complete the following sentence:

Medicine is to illness as law is to _________

(A)       discipline   (B)       anarchy   (C)       treason   (D)       etiquette

Ans. (B)

Q.3. Read the following paragraph :

“The ordinary form of mercury thermometer is used for temperature ranging from –40oF to 500oF. For measuring temperature below –40oF, thermometers filled with alcohol are used. These are, however, not satisfactory for use in high temperatures. When a mercury thermometer is used for temperature above 500oF, the space above the mercury is filled with some inert gas, usually nitrogen or carbon dioxide, placed in the thermometer under pressure. As the mercury rises, the gas pressures is increased, so that it is possible to use these thermometers for temperatures as high as 1000oF.”

With what, besides mercury, would a thermometer be filled if it wasdesigned to be used for measuring temperature of about 500oF?

(A)  Pyrometer     (B)  Inert gas       (C) Iron and brass        (D) Gas

Ans. (B)

Q.4. The cost of manufacturing tractors inKoreais twenty percent less than the cost of manufacturing  tractors inGermany. Even after transportation fees and import taxes are added, it is still cheaper to import tractors fromKoreatoGermanythan to produce tractors inGermany.

Which of the following assertions is best supported by the above information?

(A)  Labour costs inKoreaare twenty  percent below those inGermany.

(B)  Importing tractors intoGermanywill eliminate twenty  percent of the manufacturing jobs inGermany.

(C)  The costs of transporting a tractor fromKoreatoGermanyis more than twenty  percent ofthe cost of manufacturing the tractor inKorea.

(D)  The import taxes on a tractor  imported fromKoreatoGermanyis less than twenty  percentof the cost of manufacturing the tractor inGermany.

Ans. (D)

Numerical Ability

 Q.5. In a survey, 3/16  of  the people surveyed told  that they preferred to use publictransport whilecommuting  daily to office. 5/8 of the people surveyed told that theypreferred to use their own vehicles. Theremaining 75respondents said thatthey had no clear preference. How many people  preferred to usepublictransport?

(A)  75   (B)  100  (C) 125  (D) 133

Ans. (A)

Tuesday, October 2, 2012

GATE 2013 Exam Pattern

GATE 2013 is competitive examination and scholarship test for PG admission into IITs, IISc Bangalore and other GATE Score accepting institution. The GATE 2013 examination will test you in following four areas through different GATE 2013 papers-

Recall, Comprehension, Application, Analysis and Synthesis

  • GATE 2013 will carry 65 questions of 100 marks.
  • There shall be 10 questions of marks in General Aptitude / GA Section. The GA section includes 5 questions carrying 1 mark each (sub-total 5 marks) and 5 questions carrying 2 marks each (sub-total 10 marks).
  • Rest shall be allotted for main section.
GATE 2013 will ask following four different types of questions in different papers-


(i) Multiple choice questions carrying 1 or 2 marks each; Each of  the multiple choice objective questions in all papers and sections will contain four answers,  of which one correct answer is to be marked.


(ii) Common data questions (which are also multiple choice questions), where two successive questions use the same set of input data;

(iii) Linked answer questions (which are also multiple choice questions), where the answer to the first question in the pair is required to answer its successor

(iv) Numerical answer questions, where the answer is a number, to be entered by the candidate using the mouse and a virtual keypad that will be provided on the screen.


GATE 2013 Marking Scheme


For 1 mark multiple choice questions, 1/3 mark will be deducted for a wrong answer. Likewise, for 2 marks multiple choice questions, 2/3 mark will be deducted for a wrong answer. However, for the linked answer question pair, where each question carries 2 marks, 2/3  mark will be deducted for a wrong answer to the first question only. There is no negative marking for wrong answer to the second question of the linked answer question pair. If the first question in the linked pair is wrongly answered or is unattempted, then the answer to the second question in the pair will not be evaluated. There is no negative marking for numerical answer type questions (numerical answer type questions will appear only in the papers for which the exam is ONLINE only).

Source = GATE 2013 Website IIT Bombay

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