GATE XE kind:question PYQs & Answers — Page 3

Questions 21–30 of 1772. Imported answers require independent review unless marked reviewed.

The initial value problem

with

, is solved by using the explicit Euler method with step size

. Then, the value of

(rounded off up to two decimal places) is ________.

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For a laminar, incompressible, and fully-developed flow through a circular pipe, the ratio of the maximum velocity to the average velocity of the flow is

Your answerChoose one option.

1.5

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Air flows with a freestream velocity

over four different bodies having same frontal area facing the flow direction, as shown in the figure. Which one of the following bodies has the lowest pressure (form) drag force for Reynolds number,

Diagram for Engineering Sciences question 23

Your answerChoose one option.

Body P

Body Q

Body R

Body S

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Consider a steady, and incompressible flow over a body with characteristic length

. The boundary layer thickness at a distance

from the leading edge is

. Which one of the following assumptions is correct for deriving the Prandtl boundary layer equations?

Your answerChoose one option.

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Three different siphons steadily discharge water at velocities

, and

, as shown in the figure. The tubes of the siphons are of same diameter. If the frictional losses are neglected, which one of the following options is correct?

In the figure,

is acceleration due to gravity;

, and

are different heights.

Diagram for Engineering Sciences question 25

Your answerChoose one option.

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Consider the following statements:

Assertion (a)

Surface tension acts along the interface of two fluids.

Reason (r)

The pressure of the fluid inside a bubble is higher than that of the fluid outside the bubble.

Which one of the following options is correct?

Your answerChoose one option.

Both (a) and (r) are true, and (r) is the correct explanation of (a).

Both (a) and (r) are true, however (r) is not the correct explanation of (a).

(a) is true, but (r) is false.

(a) is false, but (r) is true.

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The basic dimensions, i.e., mass, length, and time are represented by M, L, and T, respectively. The correct dimension of dynamic viscosity is

Your answerChoose one option.

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The velocity components in

- and

-directions of a two-dimensional, incompressible flow field are

and

, respectively. Here,

is a polynomial function and

is a polynomial function of

only. Which one of the following options for

is correct?

Your answerChoose one option.

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Which of the following statements about streamlines, patlines, and streaklines is/are correct?

Your answerSelect all correct options. You can choose more than one.

A streamline is a curve that is everywhere tangent to the instantaneous local velocity vector.

Two streamlines can intersect at a point in a flow.

A pathline is the locus of fluid particles passing sequentially through a particular point.

For steady flow, streamlines, pathlines, and streaklines are the same.

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A piezometer and a Pitot tube are tapped into a horizontal water pipe, as shown in the figure, where

and

. Consider the flow to be steady, laminar, and incompressible. Assume the density of water as

and acceleration due to gravity as

. The water velocity

(in

) at the center of the pipe is ______ (rounded off to one decimal place)

Diagram for Engineering Sciences question 30

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GATE XE kind:question PYQs

Question 21

Question 22

Question 23

Question 24

Question 25

Question 26

Question 27

Question 28

Question 29

Question 30