GATE AE branch:ae PYQs & Answers — Page 3

Questions 21–30 of 650. Imported answers require independent review unless marked reviewed.

In the figure shown below, the flow at the nozzle exit is _______.

Diagram for Aerospace Engineering question 21

Your answerChoose one option.

overexpanded

underexpanded

ideally expanded

subsonic

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square matrix

satisfies

. The determinant of this matrix may take which of the following value(s)?

Your answerSelect all correct options. You can choose more than one.

−1

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Which of the following statements is/are TRUE about the stability of an aircraft?

Your answerSelect all correct options. You can choose more than one.

Static stability of an aircraft is sufficient to guarantee its dynamic stability

Static stability of an aircraft is related only to its initial tendency to return towards the equilibrium position from which it is disturbed

An aircraft may be dynamically unstable even if it is statically stable

Dynamic stability is related to the time history of aircraft motion after being disturbed from its equilibrium position

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For a given air-standard power, the propulsive efficiency of a turbofan engine is more than that of a turbojet engine. Which of the following is/are the reason(s) for this?

Your answerSelect all correct options. You can choose more than one.

The mass flow rate is more for a turbofan engine

The exit velocity is lower for a turbofan engine

A turbofan engine operates at a lower altitude

The fan of a turbofan engine consumes lesser power

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Shown below are qualitative illustrations of the lift curve for an airfoil when two different control surfaces are in their respective retracted and deployed configurations. Which of the following is/are TRUE?

Diagram for Aerospace Engineering question 25

Your answerSelect all correct options. You can choose more than one.

Figure P is for a flap

Figure P is for a slat

Figure Q is for a slat

Figure Q is for a flap

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The state of stress at a point in a 2-D body, in the x-y Cartesian coordinate system, is represented in matrix form as

. The transformation matrix

rotates the coordinate system to a new x'-y' Cartesian coordinate system. Select the CORRECT option(s) that represent(s) the state of stress in the new coordinate system.

Your answerSelect all correct options. You can choose more than one.

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The figure below shows the blading of the rotors of two different axial turbomachines under their typical operating conditions, labelled as Configuration I and Configuration II. Which of the following statements is/are TRUE?

Diagram for Aerospace Engineering question 27

Your answerSelect all correct options. You can choose more than one.

Configuration I corresponds to the rotor of a compressor and Configuration II corresponds to the rotor of a turbine

Configuration I corresponds to the rotor of a turbine and Configuration II corresponds to the rotor of a compressor

The rotor blades of the turbomachine in Configuration I move along the

direction

The rotor blades of the turbomachine in Configuration II move along the

direction

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A multi-stage axial compressor can be operated at two points, A and B, both of which lie on the same speed line, as shown in the figure below. If

is the isentropic efficiency of the compressor, select the statements that are TRUE.

Diagram for Aerospace Engineering question 28

Your answerSelect all correct options. You can choose more than one.

In comparison to point B, point A is closer to the surge point

In comparison to point A, point B is closer to the choke point

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Which of the following statements is/are TRUE regarding critical and drag divergence Mach numbers of a wing?

Your answerSelect all correct options. You can choose more than one.

Critical Mach number is the minimum freestream Mach number for which sonic condition is attained somewhere over the wing

Drag divergence Mach number is always higher than the critical Mach number

Drag divergence Mach number is the local Mach number over the wing at which the drag increases drastically

Critical Mach number is independent of the angle of attack

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A flow is steady, inviscid and one-dimensional, with no shaft work or body forces. Which of the following is/are possible under the given conditions?

Your answerSelect all correct options. You can choose more than one.

Oblique shocks

Sound propagation

Rayleigh flow

Fanno flow

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GATE AE branch:ae PYQs

Question 21

Question 22

Question 23

Question 24

Question 25

Question 26

Question 27

Question 28

Question 29

Question 30