GATE AE topic:aerospace-engineering PYQs & Answers — Page 33

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Questions 321–330 of 650. Imported answers require independent review unless marked reviewed.

Topic practice 650 questionsPage 33 of 65

For a thin-walled I section, the width of the two flanges as well as the web height are the same, i.e.,

mm. Thickness is 0.6 mm.

The second moment of area about a horizontal axis passing through the centroid is ______ mm

Diagram for Aerospace Engineering question 61

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A damper with damping coefficient,

, is attached to a mass of 5 kg and spring of stiffness 5 kN/m as shown in figure. The system undergoes under-damped oscillations.

If the ratio of the 3rd amplitude to the 4th amplitude of oscillations is 1.5, the value of

is ____ Ns/m (rounded off to the nearest integer).

Diagram for Aerospace Engineering question 62

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A uniform rigid prismatic bar of total mass

is suspended from a ceiling by two identical springs as shown in figure.

Let

and

be the natural frequencies of mode I and mode II respectively (

The value of

is ________ (rounded off to one decimal place).

Diagram for Aerospace Engineering question 63

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An ideal ramjet is to operate with exhaust gases optimally expanded to ambient pressure at an altitude where temperature is 220 K. The exhaust speed at the nozzle exit is 1200 m/s at a temperature of 110 K.

Given:

at 220 K;

J/(kg-K) for air

at 110 K;

J/(kg-K) for exhaust gases.

The cruise speed of this ramjet is ________ m/s (rounded off to nearest integer).

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A multistage axial compressor takes in air at 1 atm, 300 K and compresses it to a minimum of 5 atm.

The mean blade speed is 245 m/s and work coefficient,

is 0.55 for each stage. For air, use

J/(kg-K),

J/(kg-K) and

If the compression is isentropic, the number of stages required is __________ (rounded off to the next higher integer).

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(i) Arun and Aparna are here. (ii) Arun and Aparna is here. (iii) Arun’s families is here. (iv) Arun’s family is here. Which of the above sentences are grammatically CORRECT?

Your answerChoose one option.

(i) and (ii)

(i) and (iv)

(ii) and (iv)

(iii) and (iv)

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Diagram for Aerospace Engineering question 2

The mirror image of the above text about the X-axis is

Your answerChoose one option.

Diagram for Aerospace Engineering question 2 (figure 2)

Diagram for Aerospace Engineering question 2 (figure 3)

Diagram for Aerospace Engineering question 2 (figure 4)

Diagram for Aerospace Engineering question 2 (figure 5)

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Two identical cube shaped dice each with faces numbered 1 to 6 are rolled simultaneously. The probability that an even number is rolled out on each dice is:

Your answerChoose one option.

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⊕ and ⊙ are two operators on numbers

and

such that

, and

Then,

Your answerChoose one option.

-26

-33

-40

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Four persons P, Q, R and S are to be seated in a row. R should not be seated at the second position from the left end of the row. The number of distinct seating arrangements possible is:

Your answerChoose one option.

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GATE AE topic:aerospace-engineering PYQs

Question 61

Question 62

Question 63

Question 64

Question 65

Question 1

Question 2

Question 3

Question 4

Question 5