GATE AE topic:aerospace-engineering PYQs & Answers — Page 17

Questions 161–170 of 650. Imported answers require independent review unless marked reviewed.

Using Trapezoid rule with one interval, the approximate value of the definite integral:

(rounded off to 2 decimal places).

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A material has Poisson’s ratio

and Young’s modulus E=2500 MPa. The percentage change in its volume when subjected to a hydrostatic stress of magnitude 10 MPa is _____ (answer in integer).

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An airplane experiences a net vertical ground reaction of 1500 N during landing. The weight of the airplane is 1000 N. The landing vertical load factor, defined as the ratio of inertial load to the weight of the aircraft, is ________ (rounded off to 1 decimal place).

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An aircraft with a turbojet engine is flying with 250 m/s speed at an altitude, where the density of air is 1 kg/m

. The inlet area of the engine is 1 m

. The average velocity of the exhaust gases at the exit of the nozzle, with respect to aircraft, is 550 m/s. Assume the engine exit pressure is equal to the ambient pressure and the fuel-air ratio is negligible. The uninstalled thrust produced by the engine at these conditions is ________ N (rounded off to the nearest integer).

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Using thin airfoil theory, the lift coefficient of a NACA 0012 airfoil placed at 5° angle of attack in a uniform flow is __________ (rounded off to 2 decimal places).

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Given

, where

and

are non-zero real numbers, the value of the differential expression

Your answerChoose one option.

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The volume of the solid formed by a complete rotation of the shaded portion of the circle of radius R about the y-axis is

. The value of

is:

Diagram for Aerospace Engineering question 37

Your answerChoose one option.

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As per the International Standard Atmosphere model, which one of the following options about density variation with increase in altitude in the isothermal layer is correct?

Your answerChoose one option.

remains constant

increases linearly

decreases linearly

decreases exponentially

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At a point in the trajectory of an unpowered space vehicle moving about the Earth, the altitude above the mean sea level is 600 km, and the speed with reference to a coordinate system fixed to the center of mass of the Earth is 9 km/s. Assume that the Earth is a sphere with a radius 6400 km and

, where G is the universal gravitational constant and

is mass of the Earth. The trajectory is:

Your answerChoose one option.

Circular

Elliptic

Parabolic

Hyperbolic

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A multistage axial compressor, with overall isentropic efficiency of 0.83, is used to compress air at a station temperature of 300 K through a pressure ratio of 10:1. Each stage of the compressor is similar, and the stagnation temperature rise across each compressor stage is 20 K. Assume

and

for air. How many stages are there in the compressor?

Your answerChoose one option.

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GATE AE topic:aerospace-engineering PYQs

Question 31

Question 32

Question 33

Question 34

Question 35

Question 36

Question 37

Question 38

Question 39

Question 40