Aerospace Engineering GATE 2023 Questions with Answer

Ques 27 Flight Mechanics

Consider a general aviation airplane with weight 10 kN and a wing planform area of 15 m². The drag coefficient of the airplane is given as C_D = C_D0 + KC_L² with C_D0 = 0.025 and K = 0.05. For level flight at an altitude where the density is 0.60 kg/m³ and thrust 1 kN, the maximum cruise speed is _______ m/s. (rounded off to the nearest integer)

Ques 28 Flight Mechanics

An airplane with wing planform area of 20 m² and weight 8 kN is flying straight and level with a speed of 100 m/s. The total drag coefficient is 0.026 and the air density is 0.7 kg/m³. The total thrust required to introduce a steady climb angle of 0.1 radians is _______ N. (round off to the nearest integer)

Ques 29 Flight Mechanics

The maximum permissible load factor and the maximum lift force coefficient for an airplane is 7 and 2, respectively. For a wing loading of 6500 N/m² and air density 1.23 kg/m³, the speed yielding the highest possible turn rate in the vertical plane is _______ m/s. (round off to the nearest integer)

Ques 30 Fluid Mechanics

A two-dimensional potential flow solution for flow past an airfoil has a streamline pattern as shown in the figure. Which of the following conditions is additionally required to satisfy the Kutta condition?

Ques 31 Fluid Mechanics

Consider the Blasius solution for the incompressible laminar flat plate boundary layer. Among the following options, select the correct relation for the development of the momentum thickness θ with distance x from the leading edge along the length of the plate.

Ques 32 Fluid Mechanics

In a two-dimensional potential flow, the doublet is a limit of the superposition of

Ques 33 Fluid Mechanics

A supersonic aircraft has an air intake ramp that can be rotated about the leading edge O such that the shock from the leading edge meets the cowl lip as shown in the figure. Select all the correct statement(s) as per oblique shock theory when the flight Mach number M is increased.

Ques 34 Fluid Mechanics

A perfect gas stored in a large reservoir exhausts into the atmosphere through a convergent duct. The reservoir pressure is P_o and temperature is T_o. The jet emerges from the nozzle at choked conditions with average velocity u, Mach number M, pressure p, temperature T, and density ρ. If the reservoir pressure is increased, then

Ques 35 Fluid Mechanics

Consider a one-dimensional inviscid supersonic flow in a diverging duct with heat addition (Q_in) as shown. Which of the following statement(s) is/are always TRUE?

Ques 36 Fluid Mechanics

The operating characteristics of a pump were measured to be C_p = aΦ², where C_p = P/(ρω³D⁵) is the power coefficient, Φ is the flow coefficient, a is a constant, D is a length scale, ω is the rotation rate, ρ is fluid density, and P is the power required. The flow coefficient is a dimensionless volume flow rate scaled with ω and D. Assuming that the flow rate remains the same, if the rotation rate is increased to 1.25ω, the power changes to αP. The value of α is _______. (round off to two decimal places)

Ques 37 Fluid Mechanics

In a potential flow, a uniform stream of strength U directed along the x-axis and four line sources (2-dimensional) of strengths π/2, π/4, π/5, and -π/5 are placed along the x-axis at x = 0, 1, 2, and 3, respectively. The strength of an additional line source to be placed at x = 4 such that a closed streamline encircles all five sources is _______. (round off to two decimal places)

Ques 38 Fluid Mechanics

Enstrophy is defined as the square of the magnitude of vorticity. For the three-dimensional velocity field
V⃗ = (4x - 1.5y + 2.5z)î + (1.5x - 1.5y)ĵ + (0.7xy)k̂,
the enstrophy at location (1, 1, 1) is _______. (round off to two decimal places)

Ques 39 General Aptitude

"You are delaying the completion of the task. Send contributions at the earliest."