GATE AE discipline:aerospace-engineering PYQs & Answers — Page 15

Questions 141–150 of 650. Imported answers require independent review unless marked reviewed.

The following system of linear equations

has:

Your answerChoose one option.

infinitely many solutions

a unique solution

no solution

three solutions

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The acceleration of a body traveling in a straight line is given by

where

is the velocity, and

are positive constants. Starting with an initial positive velocity

, the distance traveled by the body before coming to rest for the first time is:

Your answerChoose one option.

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The three-dimensional stress-strain relationship for an isotropic material is given as

where P, Q and R are the three elastic constants,

and

represent normal and shear stresses and

and

represent normal and engineering shear strains. Which one of the following options is correct?

Your answerChoose one option.

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Consider the free vibration responses P, Q, R and S (shown in the figure) of a single degree of freedom spring-mass-damper system with the same initial conditions. For the different damping cases listed below, which one of the following options is correct?

Overdamped

Underdamped

Critically damped

Undamped

Diagram for Aerospace Engineering question 14

Your answerChoose one option.

P – 1, Q – 4, R – 2, S – 3

P – 1, Q – 2, R – 4, S – 3

P – 3, Q – 4, R – 2, S – 1

P – 3, Q – 2, R – 4, S – 1

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For a single degree of freedom spring-mass-damper system subjected to harmonic forcing, the part of the motion (response) that decays due to damping is known as:

Your answerChoose one option.

transient response

steady-state response

harmonic response

non-transient response

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For an ideal gas, the specific heat at constant pressure is 1147 J/kg K and the ratio of specific heats is equal to 1.33. What is the value of the gas constant for this gas in J/kg K?

Your answerChoose one option.

284.6

1005

862.4

8314

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A surrogate liquid hydrocarbon fuel, approximated as

, is being burned in a land-based gas turbine combustor with dry air (79%

and 21%

by volume). How many moles of dry air are required for the stoichiometric combustion of the surrogate fuel with dry air at atmospheric temperature and pressure?

Your answerChoose one option.

61.9

30.95

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In the figure shown below, various thermodynamics processes for an ideal gas are represented. Match each curve with the process that it best represents.

Diagram for Aerospace Engineering question 18

Your answerChoose one option.

aa′ – Isentropic; bb′ – Isothermal; cc′ – Isobaric; dd′ – Isochoric

aa′ – Isothermal; bb′ – Isentropic; cc′ – Isochoric; dd′ – Isobaric

aa′ – Isothermal; bb′ – Isentropic; cc′ – Isobaric; dd′ – Isochoric

aa′ – Isothermal; bb′ – Isobaric; cc′ – Isentropic; dd′ – Isochoric

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In an airbreathing gas turbine engine, the combustor inlet temperature is 600 K. The heating value of the fuel is 43.4 × 10⁶ J/kg. Assume Cₚ to be 1100 J/kg K for air and burned gases, and fuel-air ratio f<< 1.0. Neglect kinetic energy at the inlet and exit of the combustor and assume 100% burner efficiency. What is the fuel-air ratio required to achieve 1300 K temperature at the combustor exit?

Your answerChoose one option.

0.0177

0.0215

0.0127

0.0277

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Which one of the following figures represents the drag polar of a general aviation aircraft?

Your answerChoose one option.

Diagram for Aerospace Engineering question 20

Diagram for Aerospace Engineering question 20 (figure 2)

Diagram for Aerospace Engineering question 20 (figure 3)

Diagram for Aerospace Engineering question 20 (figure 4)

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GATE AE discipline:aerospace-engineering PYQs

Question 11

Question 12

Question 13

Question 14

Question 15

Question 16

Question 17

Question 18

Question 19

Question 20