Aerospace Engineering Gate Yearwise 


Aerospace Engineering Gate 2022 Questions with Answer

Ques 14 GATE 2022

The service ceiling of an airplane is the altitude _______.

A

at which the maximum rate of climb is 100 m/min

B

beyond which theoretically the airplane cannot sustain level flight

C

at which maximum power is required for flight

D

at which the maximum rate of climb is 100 ft/min


(d) is the correct answer.

Ques 15 GATE 2022

Regarding the horizontal tail of a conventional airplane, which one of the following statements is true?

A

It contributes to Cmα < 0

B

It makes Cmα = 0

C

It makes Cmα > 0

D

It makes Cm0 > 0 and Cmα > 0


(a) is the correct answer.

Ques 16 GATE 2022

An unpowered glider is flying at a glide angle of 10 degrees. Its lift-to-drag ratio is _______. (round off to two decimal places)


(5.55 to 5.80) is the correct answer.

Ques 17 GATE 2022

For a conventional airplane in straight, level, constant velocity flight condition, which of the following condition(s) is/are possible on Euler angles (φ, θ, ψ), angle of attack (α) and the sideslip angle (β)?

A

φ = 0°, θ = 2°, ψ = 0°, α = 2°, β = 0°

B

φ = 5°, θ = 0°, ψ = 0°, α = 2°, β = 0°

C

φ = 0°, θ = 3°, ψ = 0°, α = 3°, β = 5°

D

φ = 0°, θ = 5°, ψ = 0°, α = 2°, β = 5°


(a) is the correct answer.

Ques 18 GATE 2022

A conventional airplane of mass 5000 kg is doing a level turn of radius 1000 m at a constant speed of 100 m/s at sea level. Taking the acceleration due to gravity as 10 m/s2, the bank angle of the airplane is _______ degrees.


(44 to 46) is the correct answer.

Ques 19 GATE 2022

Consider a two-dimensional potential flow over a cylinder. If the freestream speed is U∞, the maximum speed on the cylinder surface is

A

U∞/2

B

3U∞/2

C

2U∞

D

4U∞/3


(c) is the correct answer.

Ques 20 GATE 2022

Consider steady, two-dimensional, incompressible flow over a non-porous flat plate as shown in the figure. For the control volume PQRS, the speed, u∞, at section PQ is uniform and the speed at section RS is given by u(y) = A0(y/h)n, where n is a positive integer. The value of A0 for which the flow through section PS will vanish is:

A

u∞/(n+1)

B

u∞(n+1)

C

u∞/(n-1)

D

u∞(n-1)


(b) is the correct answer.

Ques 21 GATE 2022

Consider the velocity distribution, u(y) shown in the figure. For two adjacent fluid layers L1 and L2, the viscous force exerted by L1 on L2 is _______.

A

to the right

B

to the left

C

vertically upwards

D

vertically downwards


(b) is the correct answer.

Ques 22 GATE 2022

Across an oblique shock wave in a calorically perfect gas, _______.

A

the stagnation enthalpy changes

B

the stagnation entropy changes

C

the stagnation temperature changes

D

the speed of sound changes


(b,d) is the correct answer.

Ques 23 GATE 2022

A cylindrical object of diameter 900 mm is designed to move axially in air at 60 m/s. Its drag is estimated on a geometrically half-scaled model in water, assuming flow similarity.
Coefficients of dynamic viscosity and densities for air and water are 1.86 x 10-5 Pa-s, 1.2 kg/m3 and 1.01 x 10-3 Pa-s, 1000 kg/m3 respectively.
Drag measured for the model is 2280 N. Drag experienced by the full-scale object is _______ N. (rounded off to the nearest integer)

A

322

B

644

C

1288

D

2576


(b) is the correct answer.

Ques 24 GATE 2022

A convergent nozzle fed from a constant pressure, constant temperature reservoir, is discharging air to the atmosphere at 1 bar (absolute) with choked flow at the exit (marked as Q). Flow through the nozzle can be assumed to be isentropic.
If the exit area of the nozzle is increased while all the reservoir parameters and ambient conditions remain the same, then at steady-state _______.

A

the nozzle will remain choked

B

the nozzle will be un-choked

C

the Mach number at section P will increase

D

the Mach number at section P will decrease


(a,c) is the correct answer.

Ques 25 GATE 2022

A rotational velocity field in an air flow is given as V⃗ = ayî + bxĵ, with a = 10 s-1, b = 20 s-1.
The air density is 1.0 kg/m3 and the pressure at (x, y) = (0 m, 0 m) is 100 kPa.
Neglecting gravity, the pressure at (x, y) = (6 m, 8 m) is _______ kPa. (rounded off to nearest integer)


(88 to 91) is the correct answer.

Ques 26 GATE 2022

Consider a solid cylinder housed inside another cylinder as shown in the figure. The radius of the inner cylinder is 1 m and its height is 2 m. The gap between the cylinders is 5 mm and is filled with a fluid of viscosity 10-4 Pa-s. The inner cylinder is rotating at a constant angular speed of 5 rad/s while the outer cylinder is stationary. Friction at the bottom surfaces can be ignored. The velocity profile in the vertical gap between the cylinders can be assumed to be linear. The driving moment required for the rotating motion of the inner cylinder is _______ Nm. (rounded off to two decimal places)


(1.24 to 1.28) is the correct answer.

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