GATE AE format:mcq PYQs & Answers — Page 21

Questions 201–210 of 326. Imported answers require independent review unless marked reviewed.

Topic practice 326 questionsPage 21 of 33

A pair of infinitely long, counter-rotating line vortices of the same circulation strength

are situated a distance

apart in a fluid, as shown in the figure. The vortices will

Diagram for Aerospace Engineering question 6

Your answerChoose one option.

rotate counter-clockwise about the midpoint with the tangential velocity at the line vortex equal to

translate along

direction with velocity at the line vortex equal to

translate along

direction with velocity at the line vortex equal to

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The streamlines of a steady two dimensional flow through a channel of height 0.2 m are plotted in the figure, where

is the stream function in m

/s. The volumetric flow rate per unit depth is

Diagram for Aerospace Engineering question 7

Your answerChoose one option.

1.0 m

2.0 m

0.5 m

0.1 m

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Which of the following options can result in an increase in the Mach number of a supersonic flow in a duct?

Your answerChoose one option.

Increasing the length of the duct

Adding heat to the flow

Removing heat from the flow

Inserting a convergent-divergent section with the same cross-sectional area at its inlet and exit planes

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Which one of the following conditions needs to be satisfied for

to be considered as an Airy’s stress function?

Your answerChoose one option.

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Consider the plane strain field given by

. The relation between

and

needed for this strain field to satisfy the compatibility condition is

Your answerChoose one option.

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For hyperbolic trajectory of a satellite of mass

having velocity

at a distance

from the center of earth (

: gravitational constant,

: mass of earth), which one of the following relations is true?

Your answerChoose one option.

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For conventional airplanes, which one of the following is true regarding roll control derivative

and yaw control derivative

, where

is rudder deflection?

Your answerChoose one option.

and

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The ratio of exit stagnation pressure to inlet stagnation pressure across the rotating impeller of a centrifugal compressor, operating with a closed exit, is

Your answerChoose one option.

0.5

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Which one of the following is a hypergolic propellant combination used in rocket engines?

Your answerChoose one option.

Liquid hydrogen – liquid oxygen

Unsymmetrical dimethyl hydrazine – nitrogen tetroxide

Rocket fuel RP-1 – liquid oxygen

Liquid hydrogen – liquid fluorine

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In aircraft engine thermodynamic cycle analysis, perfectly expanded flow in the nozzle means that the static pressure in the flow at the nozzle exit is equal to

Your answerChoose one option.

the stagnation pressure at the engine inlet.

the stagnation pressure at the nozzle exit.

the ambient pressure at the nozzle exit.

the static pressure at the nozzle inlet.

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GATE AE format:mcq PYQs

Question 6

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Question 15