Name of the University : Indian Institute of Science
Exam : GATE Exam
Document Type : Model Question Papers
Name of the Subject : Aerospace Engineering
Website : iisc.ernet.in
Download Sample Question Paper : https://www.pdfquestion.in/uploads/7647-AEGATE2015.pdf
IISC Aerospace Engineering Model Paper
Q.1 The partial differential equation 22 is
(A) linear and first order
(B) linear and second order
(C) non-linear and first order
(D) non-linear and second order
Related : Indian Institute of Science Bangalore Metallurgy GATE Exam Question Paper Model : www.pdfquestion.in/7676.html
Q.2 The system of equations for the variables x and y ax+by=e cx+dy=f has a unique solution only if
(A) ad-bc=0
(B) ac-bd=0
(C) a+c=b+d
(D) a-c=b-d
Q.3 A linear mass-spring-dashpot system is over-damped. In free vibration, this system undergoes
(A) non-oscillatory motion
(B) random motion
(C) oscillatory and periodic motion
(D) oscillatory and non-periodic motion
Q.4 A cantilever with thin-walled channel cross section is subjected to a lateral force at its shear center. The cantilever undergoes
(A) bending without twisting
(B) bending and twisting
(C) neither bending nor twisting
(D) twisting without bending
Q.5 The two non-zero principal stresses at a point in a thin plate are 1= 25 and =-25 .The maximum shear stress (in) at this point is _____.
Q.6 Consider the density and altitude at the base of an isothermal layer in the standard atmosphere to be 1 and h1, respectively. The density variation with altitude (versus h) in that layer is governed by (: specific gas constant, temperature, acceleration due to gravity at sea level)
Q.7 For constant free stream velocity and density, a change in lift for a large aspect ratio straight wing, with thin cambered airfoil section at small angles of attack, leads to
(A) a shift of the aerodynamic center and no shift of the center of pressure
(B) a shift of the center of pressure and no shift of the aerodynamic center
(C) shift of both the aerodynamic center and the center of pressure
(D) no shift either of the aerodynamic center or of the center of pressure
Q.8 Which one of the following modes of a stable aircraft has non-oscillatory response characteristics?
(A) Short period
(B) Phugoid
(C) Dutch roll
(D) Spiral
Q.9 As a candidate for a vertical tail, which one of the following airfoil sections is appropriate?
(A) NACA 0012
(B) NACA 2312
(C) NACA 23012
(D) Clarke Y profile
Q.10 The primary purpose of a trailing edge flap is to
(A) avoid flow separation
(B) increase max,lC
(C) reduce wave drag
(D) reduce induced drag
Q.11 Which one of the following aero engines has the highest propulsive efficiency?
(A) Turbojet engine without afterburner
(B) Turbojet engine with afterburner
(C) Turbofan engine
(D) Ramjet engine
Q.12 The stoichiometric fuel-to-air ratio in an aircraft engine combustor varies with the compressor pressure ratio as follows:
(A) increases linearly
(B) decreases linearly
(C) is independent
(D) increases nonlinearly
Q.13 A rocket engine produces a total impulse of 112 kn in a burn time period of 3.5 minutes with a propellant mass flow rate of 0.25 kg/s. The effective exhaust velocity (in m/s) of gas ejecting from the engine is _____.
Q.14 The function xxy-=3has
(A) no inflection point
(B) one inflection point
(C) two inflection points
(D) three inflection points
Q.15 A 0.5 kg mass is suspended vertically from a point fixed on the Earth by a spring having a stiffness of 5 n/m. The static displacement (in mm) of the mass is _____.
Q.16 A slender structure is subjected to four different loading cases (I, II, III and IV) as shown below (Figures not to scale). Which pair of cases results in identical stress distribution at section S – S located far away from both ends?
Q.18 The percentage change in the lift-off distance for a 20 % increase in aircraft weight is _____.
Q.19 Consider a monoplane wing and a biplane wing with identical airfoil sections, wingspans and incidence angles in identical conditions in a wind tunnel. As compared to the monoplane, the biplane experiences
(A) a higher lift and a higher drag
(B) a higher lift and a lower drag
(C) a lower lift and a lower drag
(D) a lower lift and a higher drag
Q.20 A statically stable trimmed aircraft experiences a gust and the angle of attack reduces momentarily. As a result, the center of pressure of the aircraft
(A) shifts forward
(B) shifts rearward
(C) does not shift
(D) coincides with the neutral point
Q.24 Isentropic efficiencies of an aircraft engine operating at typical subsonic cruise conditions with the following components – intake, compressor, turbine and nozzle – are denoted by i?, c?, t?and n?, respectively. Which one of the following is correct?
(A) ntci
(B) ncit
(C) nitc
(D) ntic
Q.25 A rocket nozzle is designed to produce maximum thrust at an altitude, h = 8 Km from the sea level. The nozzle operates in
(A) under-expanded condition for H > 8Km
(B) under-expanded condition for h < 8 km
(C) sonic exit condition for h > 8 km
(D) unchoked condition for h < 8 km