GATE AE 2021 Paper 1 — page 8

Questions 22–24 of 65. Imported answers require review unless explicitly marked reviewed.

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?

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?

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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2021 · Paper 1