GATE AE kind:question PYQs & Answers — Page 35

Questions 341–350 of 650. Imported answers require independent review unless marked reviewed.

Topic practice 650 questionsPage 35 of 65

How does the specific thrust of a turbojet engine change for a given flight speed with increase in flight altitude?

Your answerChoose one option.

Increases monotonically

Decreases monotonically

Remains constant

First increases and then decreases

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How does the propulsion efficiency of a turbofan engine, operating at a given Mach number and a given altitude, change with increase in compressor pressure ratio?

Your answerChoose one option.

Remains constant

Increases monotonically

Decreases monotonically

First decreases and then increases

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A solid propellant rocket producing 25 MN thrust is fired for 150 seconds. The specific impulse of the rocket is 2980 Ns/kg. How much propellant is burned during the rocket operation?

Your answerChoose one option.

8390 kg

8300 kg

1.26 x 10^6 kg

1.2 x 10^6 kg

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The shape of a supersonic diffuser that slows down a supersonic flow to subsonic flow is

Your answerChoose one option.

converging

diverging

diverging–converging

converging–diverging

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Uniaxial tension test (see the figure) is conducted on two different samples prepared with homogeneous, isotropic materials. One of the materials is brittle, whereas the other is ductile.

Diagram for Aerospace Engineering question 10

Assuming that there is no stress concentration at loading points, the failure would initiate:

Your answerChoose one option.

along x-x in both materials

along x-x in brittle material and along y-y in ductile material

along y-y in brittle material and along x-x in ductile material

along y-y in both materials

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For the state of stress as shown in the figure, what is the orientation of the plane with maximum shear stress with respect to the x-axis?

Diagram for Aerospace Engineering question 11

Your answerChoose one option.

45°

-45°

22.5°

-22.5°

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Let

be the true airspeed of an aircraft flying at a certain altitude where the density of air is

, and

be the equivalent airspeed. If

is the density of air at sea-level, what is the ratio

equal to?

Your answerChoose one option.

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variation for a certain aircraft is shown in the figure. Which one of the following statements is true for this aircraft?

Diagram for Aerospace Engineering question 13

Your answerChoose one option.

The aircraft can trim at a positive

and it is stable.

The aircraft can trim at a positive

, but it is unstable.

The aircraft can trim at a negative

and it is stable.

The aircraft can trim at a negative

, but it is unstable.

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Which of the following statement(s) is/are true across an oblique shock (in adiabatic conditions) over a wedge shown below?

Diagram for Aerospace Engineering question 14

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

Total pressure decreases

Mach number based on velocity tangential to the shock decreases

Total temperature remains constant

Mach number based on velocity tangential to the shock remains the same and that based on velocity normal to the shock decreases

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Which of the following statement(s) is/are true with regards to Kutta condition for flow past airfoils?

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

It is utilized to determine the circulation on an airfoil.

It is applicable only to airfoils with sharp trailing edge.

The trailing edge of an airfoil is a stagnation point.

The flow leaves the trailing edge smoothly.

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