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This mock test of Fluid Mechanics - 2 for GATE helps you for every GATE entrance exam.
This contains 20 Multiple Choice Questions for GATE Fluid Mechanics - 2 (mcq) to study with solutions a complete question bank.
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QUESTION: 1

Two pipe systems are said to be equivalent when

Solution:

*Answer can only contain numeric values

QUESTION: 2

In a Laminar Boundary Layer over a flat plate, the ratio of shear stresses r_{1} and r_{2}’ at two sections 1 and 2 at distances from the leading edge such that X_{2} = 9x_{1}, is

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QUESTION: 3

Water (S = 1, μ = 1 centipoise) flows under pressure through of a pipe of 1 cm diameter at a velocity of 60 cm/min. What would be the head loss per km length of the pipe?

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QUESTION: 4

The Dray-Weisbach equation for head loss is valid

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QUESTION: 5

For a solid sphere falling under gravity at terminal velocity in a fluid.

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QUESTION: 6

For uniform flow in a channel

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QUESTION: 7

The relationship between Manning’s coefficient ‘n’ and Chezy’s coefficient 'c' is given by

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QUESTION: 8

If the specific energy at the upstream section of a rectangular channel is 3 m and minimum specific energy is 2.5 m, the maximum height of hump without causing afflux will be

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QUESTION: 9

For a steep slope profile S_{1}, the type of flow will be

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QUESTION: 10

Pick up the incorrect statement with respect to critical flow

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QUESTION: 11

The critical depth of flow in a most economical triangular channel section for a discharge of 1 m ^{3}/sec is given by

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QUESTION: 12

If the depth of flow in a channel is 1 m and velocity of flow is 2 m/sec. then the velocity with which an elementary wave can travel down stream

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QUESTION: 13

Figure below shoes gradually varied flow in an open chennal with a brake in bed slope

Types of water surface profiles occuring from left to right is

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QUESTION: 14

Which one of the following pairs of situations and types of water surface profiles is not correctly matched?

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QUESTION: 15

A discharge of 3.0 m^{3}/s flows in a canal, 2 m side, at a depth of 1.2 m. If the width of the canal is reduced to 1.5 m by a canal transition, then the neglecting losses, the depth of flow after the contraction will be

Solution:

QUESTION: 16

A hydraulically efficient trapezoidal section of open channel flow carries water at the optimal depth of 0.6m.Chezy coefficient is 75 and bed slope is 1 in 250. What is the discharge through the channel?

Solution:

QUESTION: 17

Common Data Questions (32 and 33):

A smooth flat plate with a sharp leading edge is placed along a gas free stream flowing at U = 10 m/s. The thickness of the boundary layer at section r-s is 10 mm, the breadth of the plate is 1 m (into the paper) and the density of the gas, p = 1.0 kg/m^{3} . Assume that the boundary layer is thin, two - dimensional, and follows a linear velocity distribution, u = U (y/δ), at the section r-s, where y is the height from plate.

Q. The mass flow rate in Kg/s accros the section q-r is

Solution:

QUESTION: 18

A smooth flat plate with a sharp leading edge is placed along a gas free stream flowing at U = 10 m/s. The thickness of the boundary layer at section r-s is 10 mm, the breadth of the plate is 1 m (into the paper) and the density of the gas, p = 1.0 kg/m^{3} . Assume that the boundary layer is thin, two - dimensional, and follows a linear velocity distribution, u = U (y/δ), at the section r-s, where y is the height from plate.

Q. The integrated drag force in N on the plate, between p-s, is

Solution:

QUESTION: 19

Linked Data Questions (34 and 35):

Consider fully developed, laminar flow in a circular pipe of radius ‘R’ .The centre - line velocity of the flow is U_{m.}

Q. The velocity u at a radial distance r from the center line of the pipe is given by

Solution:

QUESTION: 20

Consider fully developed, laminar flow in a circular pipe of radius ‘R’ .The centre - line velocity of the flow is U_{m}

Q.The value of the radial distance from the centre line of the pipe at which the velocity would be equal to the average velocity of the flow is

Solution:

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