Γενεραλ Απτιτυδε ΓΑ Σετ 8. Θ.1 Τηε χηαιρmαν ρεθυεστεδ τηε αγγριεϖεδ σηαρεηολδερσ το ηιm. (Α) βαρε ωιτη (Β) βορε ωιτη (Χ) βεαρ ωιτη (D) βαρε
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1 ΓΑΤΕ 016 Γενεραλ Απτιτυδε ΓΑ Σετ 8 Q. 1 Q. 5 carry one mark each. Θ.1 Τηε χηαιρmαν ρεθυεστεδ τηε αγγριεϖεδ σηαρεηολδερσ το ηιm. (Α) βαρε ωιτη (Β) βορε ωιτη (Χ) βεαρ ωιτη (D) βαρε Θ. Ιδεντιφψ τηε χορρεχτ σπελλινγ ουτ οφ τηε γιϖεν οπτιονσ: (Α) Μαναγαβλε (Β) Μαναγεαβλε (Χ) Μανγαεβλε (D) Μαναγιβλε Θ.3 Πιχκ τηε οδδ ονε ουτ ιν τηε φολλοωινγ: 13, 3, 33, 43, 53 (Α) 3 (Β) 33 (Χ) 43 (D) 53 Θ.4 ΡD ισ α ροβοτ. ΡD χαν ρεπαιρ αεροπλανεσ. Νο οτηερ ροβοτ χαν ρεπαιρ αεροπλανεσ. Wηιχη οφ τηε φολλοωινγ χαν βε λογιχαλλψ ινφερρεδ φροm τηε αβοϖε στατεmεντσ? (Α) ΡD ισ α ροβοτ ωηιχη χαν ονλψ ρεπαιρ αεροπλανεσ. (Β) ΡD ισ τηε ονλψ ροβοτ ωηιχη χαν ρεπαιρ αεροπλανεσ. (Χ) ΡD ισ α ροβοτ ωηιχη χαν ρεπαιρ ονλψ αεροπλανεσ. (D) Ονλψ ΡD ισ α ροβοτ. Θ.5 Ιφ 9ψ 6 =3, τηεν ψ 4ψ/3 ισ. (Α) 0 (Β) +1/3 (Χ) 1/3 (D) υνδεφινεδ 1/3
2 ΓΑΤΕ 016 Q. 6 Q. 10 carry two marks each. Γενεραλ Απτιτυδε ΓΑ Σετ 8 Θ.6 Τηε φολλοωινγ γραπη ρεπρεσεντσ τηε ινσταλλεδ χαπαχιτψ φορ χεmεντ προδυχτιον (ιν τοννεσ) ανδ τηε αχτυαλ προδυχτιον (ιν τοννεσ) οφ νινε χεmεντ πλαντσ οφ α χεmεντ χοmπανψ. Χαπαχιτψ υτιλιζατιον οφ α πλαντ ισ δεφινεδ ασ ρατιο οφ αχτυαλ προδυχτιον οφ χεmεντ το ινσταλλεδ χαπαχιτψ. Α πλαντ ωιτη ινσταλλεδ χαπαχιτψ οφ ατ λεαστ 00 τοννεσ ισ χαλλεδ α λαργε πλαντ ανδ α πλαντ ωιτη λεσσερ χαπαχιτψ ισ χαλλεδ α σmαλλ πλαντ. Τηε διφφερενχε βετωεεν τοταλ προδυχτιον οφ λαργε πλαντσ ανδ σmαλλ πλαντσ, ιν τοννεσ ισ. Θ.7 Α πολλ οφ στυδεντσ αππεαρινγ φορ mαστερσ ιν ενγινεερινγ ινδιχατεδ τηατ 60 % οφ τηε στυδεντσ βελιεϖεδ τηατ mεχηανιχαλ ενγινεερινγ ισ α προφεσσιον υνσυιταβλε φορ ωοmεν. Α ρεσεαρχη στυδψ ον ωοmεν ωιτη mαστερσ ορ ηιγηερ δεγρεεσ ιν mεχηανιχαλ ενγινεερινγ φουνδ τηατ 99 % οφ συχη ωοmεν ωερε συχχεσσφυλ ιν τηειρ προφεσσιονσ. Wηιχη οφ τηε φολλοωινγ χαν βε λογιχαλλψ ινφερρεδ φροm τηε αβοϖε παραγραπη? (Α) Μανψ στυδεντσ ηαϖε mισχονχεπτιονσ ρεγαρδινγ ϖαριουσ ενγινεερινγ δισχιπλινεσ. (Β) Μεν ωιτη αδϖανχεδ δεγρεεσ ιν mεχηανιχαλ ενγινεερινγ βελιεϖε ωοmεν αρε ωελλ συιτεδ το βε mεχηανιχαλ ενγινεερσ. (Χ) Μεχηανιχαλ ενγινεερινγ ισ α προφεσσιον ωελλ συιτεδ φορ ωοmεν ωιτη mαστερσ ορ ηιγηερ δεγρεεσ ιν mεχηανιχαλ ενγινεερινγ. (D) Τηε νυmβερ οφ ωοmεν πυρσυινγ ηιγηερ δεγρεεσ ιν mεχηανιχαλ ενγινεερινγ ισ σmαλλ. /3
3 ΓΑΤΕ 016 Γενεραλ Απτιτυδε ΓΑ Σετ 8 Θ.8 Σουρψα χοmmιττεε ηαδ προποσεδ τηε εσταβλισηmεντ οφ Σουρψα Ινστιτυτεσ οφ Τεχηνολογψ (ΣΙΤσ) ιν λινε ωιτη Ινδιαν Ινστιτυτεσ οφ Τεχηνολογψ (ΙΙΤσ) το χατερ το τηε τεχηνολογιχαλ ανδ ινδυστριαλ νεεδσ οφ α δεϖελοπινγ χουντρψ. Wηιχη οφ τηε φολλοωινγ χαν βε λογιχαλλψ ινφερρεδ φροm τηε αβοϖε σεντενχε? Βασεδ ον τηε προποσαλ, (ι) Ιν τηε ινιτιαλ ψεαρσ, ΣΙΤ στυδεντσ ωιλλ γετ δεγρεεσ φροm ΙΙΤ. (ιι) ΣΙΤσ ωιλλ ηαϖε α διστινχτ νατιοναλ οβϕεχτιϖε. (ιιι) ΣΙΤ λικε ινστιτυτιονσ χαν ονλψ βε εσταβλισηεδ ιν χονσυλτατιον ωιτη ΙΙΤ. (ιϖ) ΣΙΤσ ωιλλ σερϖε τεχηνολογιχαλ νεεδσ οφ α δεϖελοπινγ χουντρψ. (Α) (ιιι) ανδ (ιϖ) ονλψ. (Χ) (ιι) ανδ (ιϖ) ονλψ. (Β) (ι) ανδ (ιϖ) ονλψ. (D) (ιι) ανδ (ιιι) ονλψ. Θ.9 Σηαθυιλλε Ο Νεαλ ισ α 60% χαρεερ φρεε τηροω σηοοτερ, mεανινγ τηατ ηε συχχεσσφυλλψ mακεσ 60 φρεε τηροωσ ουτ οφ 100 αττεmπτσ ον αϖεραγε. Wηατ ισ τηε προβαβιλιτψ τηατ ηε ωιλλ συχχεσσφυλλψ mακε εξαχτλψ 6 φρεε τηροωσ ιν 10 αττεmπτσ? (Α) (Β) (Χ) (D) Θ.10 Τηε νυmεραλ ιν τηε υνιτσ ποσιτιον οφ ισ. END OF THE QUESTION PAPER 3/3
4 Q. 1 Q. 5 carry one mark each. Q.1 With increase in airfoil thickness, the critical Mach number for an airfoil is likely to (A) decrease. (B) increase. (C) remain unchanged. (D) be undefined. Q. Due to a body in potential flow, the velocity at a point A in the flow field is 0 m/s while the free stream velocity is only 10 m/s. The value of coefficient of pressure (C p ) at the point A is. Q.3 Which of the following airfoil will have location of the maximum camber at half chord length from the leading edge? (A) NACA 51 (B) NACA 15 (C) NACA 15 (D) NACA 51 Q.4 For a laminar incompressible flow past a flat plate at zero angle of attack, the variation of skin friction drag coefficient C f with Reynolds number based on the chord length Re c can be expressed as (A) C f Re (B) C Re (C) C (D) C f f f 1 c c 1 Re Re c c Q.5 Which of the following statement is NOT TRUE across an oblique shock wave? (A) Static temperature increases, total temperature remains constant. (B) Static pressure increases, static temperature increases. (C) Static temperature increases, total pressure decreases. (D) Static pressure increases, total temperature decreases. Q.6 For a completely subsonic isentropic flow through a convergent nozzle, which of the following statement is TRUE? (A) Pressure at the nozzle exit > back pressure. (B) Pressure at the nozzle exit < back pressure. (C) Pressure at the nozzle exit = back pressure. (D) Pressure at the nozzle exit = total pressure. Q.7 Which of the following aircraft engines has the highest propulsive efficiency at a cruising Mach number of less than 0.5? (A) Turbofan engine (C) Turboprop engine (B) Turbojet engine (D) Ramjet engine Q.8 Air, with a Prandtl number of 0.7, flows over a flat plate at a high Reynolds number. Which of the following statement is TRUE? (A) Thermal boundary layer is thicker than the velocity boundary layer. (B) Thermal boundary layer is thinner than the velocity boundary layer. (C) Thermal boundary layer is as thick as the velocity boundary layer. (D) There is no relationship between the thicknesses of thermal and velocity boundary layers. AE 1/9
5 Q.9 Consider an eigenvalue problem given by Ax= i x. If i represent the eigenvalues of the nonsingular square matrix A, then what will be the eigenvalues of matrix A? (A) 4 i (B) i (C) 1/ i (D) 1/ i 4 Q.10 If A and B are both non-singular n n matrices, then which of the following statement is NOT TRUE. Note: det represents the determinant of a matrix. (A) det(ab) = det(a)det(b) (B) det(a+b) = det(a) + det(b) (C) det(aa -1 ) = 1 (D) det(a T ) = det(a) Q.11 The total number of material constants that are necessary and sufficient to describe the three dimensional Hooke s law for an isotropic material is. Q.1 Determine the correctness or otherwise of the following statements, [a] and [r]: [a]: In a plane stress problem, the shear strains along the thickness direction of a body are zero but the normal strain along the thickness is not zero. [r]: In a plane stress problem, Poisson effect induces the normal strain along the thickness direction of the body. (A) Both [a] and [r] are true and [r] is the correct reason for [a]. (B) Both [a] and [r] are true but [r] is not the correct reason for [a]. (C) Both [a] and [r] are false. (D) [a] is true but [r] is false. Q.13 Consider four thin-walled beams of different open cross-sections, as shown in the cases (i-iv). A shear force of magnitude F acts vertically downward at the location P in all the beams. In which of the following case, does the shear force induce bending and twisting? Case (i) Case (ii) Case (iii) Case (iv) (A) (i) (C) (iii) (B) (ii) (D) (iv)
6 Q.14 The effective stiffness of the spring-mass system as shown in the figure below is N/mm. Q.15 A structural member supports loads, which produce at a particular point, a state of pure shear stress of 50 N/mm. At what angles are the principal planes oriented with respect to the plane of pure shear? Q.16 (A) π/6 and π/3 (B) π/4 and 3π/4 (C) π/4 and π/ (D) π/ and π Let x be a positive real number. The function x has its minima at x=. Q.17 The vector u is defined as u yê x xê y, where ê x and ê y are the unit vectors along x and y directions, respectively. If the vector is defined as u, then u. Q.18 u u The partial differential equation, where α is a positive constant, is t x (A) circular. (B) elliptic. (C) hyperbolic. (D) parabolic. Q.19 Combustion in gas turbine engines is ideally represented as the following process: (A) Adiabatic (B) Isentropic (C) Isobaric (D) Isochoric Q.0 For a given chamber pressure, the thrust of a rocket engine is highest when (A) the rocket is operating at its design altitude. (B) the rocket is operating in vacuum. (C) the rocket is operating at sea-level. (D) there is a normal shock in the rocket nozzle. Q.1 The damping ratio in phugoid motion for gliders is usually less compared to powered aircraft because (A) gliders are unpowered. (B) gliders are light. (C) lift to drag ratio is higher for gliders. (D) gliders fly at low speed. Q. During an aircraft cruising flight, the altitude above the ground is usually measured using (A) dynamic pressure. (C) radar. f x 1 x (B) static pressure. (D) laser range finder. AE 3/9
7 Q.3 Indicated airspeed is used by a pilot during (A) take-off. (C) setting the engine RPM. (B) navigation. (D) setting the elevator angle. Q.4 The pitch angle and the angle of attack for a fixed wing aircraft are equal during (A) wings level constant altitude flight. (B) unaccelerated climb. (C) unaccelerated descent. (D) landing. Q.5 The load factor of an aircraft turning at a constant altitude is. The coefficient of lift required for turning flight as compared to level flight at the same speed will be (A) same (C) double (B) half (D) four times Q. 6 Q. 55 carry two marks each. Q.6 An un-mixed turbofan engine with a bypass ratio of 6.0, flies with a velocity of 00 m/s. The core and the bypass nozzles of the engine, that are both convergent nozzles, operate under choked condition and have exhaust static temperatures of 580 K and 95 K, respectively. The specific gas constant and the ratio of specific heats for both the streams are 87 J/kgK and 1.4, respectively. If the fuel-air ratio is negligible, the thrust per unit mass flow rate generated by the engine is Ns/kg. Q.7 A single-stage gas turbine operates with an axial absolute flow at the entry and exit from the stage. The absolute flow angle at the nozzle exit is 70 o. The turbine stage generates a specific work of 8 kj/kg when operating with a mean blade speed of 440 m/s. The absolute velocity at the rotor entry is (A) 75.7 m/s (B) m/s (C) m/s (D) m/s Q.8 An axial compressor operates such that it has an inlet and an exit total temperature of 300 K and 430 K, respectively. The isentropic efficiency of the compressor is 85 %. If the ratio of specific heats is 1.4, then the total pressure ratio across the compressor is. Q.9 The maximum value of coefficient of lift ( C l ) for a D circular cylinder, provided at least one stagnation point lies on the cylinder surface, is predicted by the potential flow theory to be (A) π/ (B) π (C) π (D) 4π AE 4/9
8 Q.30 The nozzle AB, as shown below, leading to the test section of a low speed subsonic wind tunnel, has a contraction ratio of 10:1. The pressure difference across the nozzle is maintained at 1000 N/m and the density of air is 1.3 kg/m 3. Assuming one-dimensional, steady, inviscid flow, the velocity in the test section as measured at point B is m/s. Q.31 The rate of change of moment coefficient with respect to the angle of attack, point of a thin airfoil, as per approximations from the thin airfoil theory is dc m, at half chord d (A) π/4 radian -1 (B) π/ radian -1 (C) π radian -1 (D) π radian -1 Q.3 An untwisted wing of elliptic planform and aspect ratio 6 consists of thin symmetric airfoil o sections. The coefficient of lift (C L ) at 10 angle of attack assuming inviscid incompressible flow is (A) π /16 (B) π /1 (C) π /8 (D) π/ Q.33 A gaseous mixture of air and fuel enters a constant area combustion chamber at a velocity of 100 m/s and at a static temperature of 300 K. The heat release due to combustion is 1000 kj/kg. The specific heat at constant pressure of the calorically perfect gas is 1000 J/kgK. The total temperature of air-fuel mixture after combustion is K. Q.34 Consider 1-D, steady, inviscid, compressible flow through a convergent nozzle. The total temperature and total pressure are T o, P o respectively. The flow through the nozzle is choked with a mass flow rate of m. If the total temperature is increased to 4 T, with total pressure remaining Q.35 o unchanged, then the mass flow rate through the nozzle (A) remains unchanged. (B) becomes half of m. (C) becomes twice of m. (D) becomes four times of m. o o o d y dy Consider a second order linear ordinary differential equation 4 4y 0, with the dx dx dy boundary conditions y(0) 1; 1. The value of y at x =1 is dx x 0 (A) 0 (B) 1 (C) e (D) e o
9 Q.36 Consider the following system of linear equations: x y + z = 1 3x 3y + 4z = 6 x y + 3z = 4 This system of linear equations has (A) no solution. (B) one solution. (C) two solutions. (D) three solutions. Q.37 A bar made of linear elastic isotropic material is fixed at one end and subjected to an axial force of 1 kn at the other end. The cross-sectional area of the bar is 100 mm, length is 100 mm and the Young s Modulus is N/mm. The strain energy stored in the bar is Nmm. Q.38 A cantilever beam-spring system is shown in the figure. The beam is made with a material of Young s modulus N/mm and geometry such that its moment of inertia is 100 mm 4 and length l = 100 mm. It is supported by a spring of stiffness K = 30 N/mm and subjected to a load of P = 100 N at the point B. The deflection at the point B due to the load P is mm. Q.39 Determine the correctness or otherwise of the following statements, [a] and [r], [a]: Ribs, used in airplane wings, increase the column buckling strength of the longitudinal stiffeners. [r]: Ribs distribute concentrated loads into the structure and redistribute stresses around discontinuities. (A) Both [a] and [r] are true and [r] is the correct reason for [a] (B) Both [a] and [r] are true but [r] is not the correct reason for [a] (C) Both [a] and [r] are false (D) [a] is true but [r] is false AE 6/9
10 Q.40 A channel section shown in the figure has uniform thickness. It is subjected to an anticlockwise torque of Nmm. The maximum possible thickness of the channel section, such that the shear stress induced in it does not exceed 100 N/mm, is mm. Q.41 The governing differential equation of motion of a damped system is given by d x dx m c kx 0 dt. If m = 1 kg, c = Ns/m and k = N/m then the frequency of the damped dt oscillation of this system is rad/s. Q.4 The two dimensional state of stress in a body is described by the Airy s stress function: x x y x y xy y E. The Airy s stress function will satisfy the equilibrium and the compatibility requirements if and only if the value of the coefficient E is. Q.43 The value of definite integral sin x 0 x dx is. Q.44 Use Newton-Raphson method to solve the equation: x e x 1. Begin with the initial guess x The solution after one step is x. Q.45 A wall of thickness 5 mm is heated by a hot gas flowing along the wall. The gas is at a temperature of 3000 K, and the convective heat transfer coefficient is 160 W/m K. The wall thermal conductivity is 40 W/mK. If the colder side of the wall is held at 500 K, the temperature of the side exposed to the hot gas is K. Q.46 A launch vehicle has a main rocket engine with two identical strap-on motors, all of which fire simultaneously during the operation. The main engine delivers a thrust of 6300 kn with a specific impulse of 48 s. Each strap-on motor delivers a thrust of 1000 kn with specific impulse of 9 s. The acceleration due to gravity is 9.81 m/s. The effective (combined) specific impulse of the vehicle is s. Q.47 A substance experiences an entropy change of s 0 in a quasi-steady process. The rise in temperature (corresponding to the entropy change s ) is highest for the following process: (A) isenthalpic (B) isobaric (C) isochoric (D) isothermal
11 Q.48 In a particular rocket engine, helium propellant is heated to 6000 K and 95% of its total enthalpy is recovered as kinetic energy of the nozzle exhaust. Consider helium to be a calorically perfect gas with specific heat at constant pressure of 500 J/kgK. The exhaust velocity for such a rocket for an optimum expansion is m/s. Q.49 An aircraft is flying level in the North direction at a velocity of 55 m/s under cross wind from East to West of 5 m/s. For the given aircraft C nβ = 0.01/deg and C nδr = /deg, where δr is the rudder deflection and β is the side slip angle. The rudder deflection exerted by pilot is degrees. Q.50 An aircraft weighing N is flying level at 100 m/s and it is powered by a jet engine. The thrust required for level flight is 1000 N. The maximum possible thrust produced by the jet engine is 5000 N. The minimum time required to climb 1000 m, when flight speed is 100 m/s, is s. Q.51 The aircraft velocity (m/s) components in body axes are given as [u, v, w] = [100, 10, 10]. The air velocity (m/s), angle of attack (deg) and sideslip angle (deg) in that order are (A) [10, 0.1, 0.1] (B) [100, 0.1, 0.1] (C) [ , 0.1, 5.73] (D) [ , 5.71, 5.68] Q.5 The Dutch roll motion of the aircraft is described by following relationship 0.6 r r The undamped natural frequency (rad/s) and damping ratio for the Dutch roll motion in that order are: (A) 4.68, 1.0 (B) 4.49, 1.0 (C).165, 0.35 (D).165, 1.0 Q.53 A glider weighing 3300 N is flying at 1000 m above sea level. The wing area is 14.1 m and the air density is 1.3 kg/m 3. Under zero wind conditions, the velocity for maximum range is m/s. α (deg) C L C D C L /C D Q.54 A rocket, with a total lift-off mass of kg, moves vertically upward from rest under a constant gravitational acceleration of 9.81 m/s. The propellant mass of 8400 kg burns at a constant rate of 100 kg/s. If the specific impulse of the rocket engine is 40 s, neglecting drag, the burnout velocity in m/s is (A) (B) (C) (D) AE 8/9
12 Q.55 A satellite is injected at an altitude of 350 km above the Earth s surface, with a velocity of 8.0 km/s parallel to the local horizon. (Earth radius=6378 km, µ E (GM=Gravitational constant Earth mass) = m 3 s - ). The satellite (A) forms a circular orbit. (C) escapes from Earth s gravitational field. (B) forms an elliptic orbit. (D) falls back to earth. END OF THE QUESTION PAPER AE 9/9
Γενεραλ Απτιτυδε ΓΑ Σετ 8. Θ.1 Τηε χηαιρmαν ρεθυεστεδ τηε αγγριεϖεδ σηαρεηολδερσ το ηιm. (Α) βαρε ωιτη (Β) βορε ωιτη (Χ) βεαρ ωιτη (D) βαρε
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Γενεραλ Απτιτυδε ΓΑ Σετ 8. Θ.1 Τηε χηαιρmαν ρεθυεστεδ τηε αγγριεϖεδ σηαρεηολδερσ το ηιm. (Α) βαρε ωιτη (Β) βορε ωιτη (Χ) βεαρ ωιτη (D) βαρε
ΓΑΤΕ 2016 Γενεραλ Απτιτυδε ΓΑ Σετ 8 Q. 1 Q. 5 carry one mark each. Θ.1 Τηε χηαιρmαν ρεθυεστεδ τηε αγγριεϖεδ σηαρεηολδερσ το ηιm. (Α) βαρε ωιτη (Β) βορε ωιτη (Χ) βεαρ ωιτη (D) βαρε Θ.2 Ιδεντιφψ τηε χορρεχτ
Γενεραλ Απτιτυδε ΓΑ Σετ 8. Θ.1 Τηε χηαιρmαν ρεθυεστεδ τηε αγγριεϖεδ σηαρεηολδερσ το ηιm. (Α) βαρε ωιτη (Β) βορε ωιτη (Χ) βεαρ ωιτη (D) βαρε
ΓΑΤΕ 2016 Γενεραλ Απτιτυδε ΓΑ Σετ 8 Q. 1 Q. 5 carry one mark each. Θ.1 Τηε χηαιρmαν ρεθυεστεδ τηε αγγριεϖεδ σηαρεηολδερσ το ηιm. (Α) βαρε ωιτη (Β) βορε ωιτη (Χ) βεαρ ωιτη (D) βαρε Θ.2 Ιδεντιφψ τηε χορρεχτ
Γενεραλ Απτιτυδε ΓΑ Σετ 8. Θ.1 Τηε χηαιρmαν ρεθυεστεδ τηε αγγριεϖεδ σηαρεηολδερσ το ηιm. (Α) βαρε ωιτη (Β) βορε ωιτη (Χ) βεαρ ωιτη (D) βαρε
ΓΑΤΕ 2016 Γενεραλ Απτιτυδε ΓΑ Σετ 8 Q. 1 Q. 5 carry one mark each. Θ.1 Τηε χηαιρmαν ρεθυεστεδ τηε αγγριεϖεδ σηαρεηολδερσ το ηιm. (Α) βαρε ωιτη (Β) βορε ωιτη (Χ) βεαρ ωιτη (D) βαρε Θ.2 Ιδεντιφψ τηε χορρεχτ
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