Chemical Engineering

For laminar flow of a shear thinning liquid in a pipe, if the volumetric flow rate is doubled, the pressure gradient will increase by a factor of

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Question: For laminar flow of a shear thinning liquid in a pipe, if the volumetric flow rate is doubled, the pressure gradient will increase by a factor of
[A].

2

[B].

<2

[C].

>2

[D].

1/2

Answer: Option A

Explanation:

No answer description available for this question.

Applying a pressure drop across a capillary results in a volumetric flow rate ‘Q’ under laminar flow conditions. The flow rate for the same pressure drop, in a capillary of the same length but half the radius is

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Question: Applying a pressure drop across a capillary results in a volumetric flow rate ‘Q’ under laminar flow conditions. The flow rate for the same pressure drop, in a capillary of the same length but half the radius is
[A].

Q/2

[B].

Q/4

[C].

Q/8

[D].

Q/16

Answer: Option D

Explanation:

No answer description available for this question.

Boundary layer separation is characterised by one of the conditions given below, where ‘Re’ is the Reynolds number for the flow. Select the appropriate conditions.

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Question: Boundary layer separation is characterised by one of the conditions given below, where ‘Re’ is the Reynolds number for the flow. Select the appropriate conditions.
[A].

Re << 1, accelerating flow

[B].

Re >> 1, accelerating flow

[C].

Re << 1, decelerating flow

[D].

Re >>1, decelerating flow

Answer: Option D

Explanation:

No answer description available for this question.

A pipe of I.D. 4 m is bifurcated into two pipes of I.D. 2 m each. If the average velocity of water flowing through the main pipe is 5 m/sec, the average velocity through the bifurcated pipes is

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Question: A pipe of I.D. 4 m is bifurcated into two pipes of I.D. 2 m each. If the average velocity of water flowing through the main pipe is 5 m/sec, the average velocity through the bifurcated pipes is
[A].

20 m/sec

[B].

10 m/sec

[C].

52 m/sec

[D].

5 m/sec

Answer: Option B

Explanation:

No answer description available for this question.

A Newtonion liquid (ρ = density, μ = viscosity) is flowing with velocity v in a tube of diameter ‘D’. Let Δp be the pressure drop across the length ‘L’. For a laminar flow, Δp is proportional to

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Question: A Newtonion liquid (ρ = density, μ = viscosity) is flowing with velocity v in a tube of diameter ‘D’. Let Δp be the pressure drop across the length ‘L’. For a laminar flow, Δp is proportional to
[A].

L ρv2/D

[B].

L μ;V/D2

[C].

D ρv2/L

[D].

μ V/L

Answer: Option A

Explanation:

No answer description available for this question.

In the laminar boundary layer flow over a flat plate, the ratio (δ/x) varies as :(where, ‘δ’ is the boundary layer thickness and ‘x’ is the distance from the leading edge in the direction of flow).

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Question: In the laminar boundary layer flow over a flat plate, the ratio (δ/x) varies as :(where, ‘δ’ is the boundary layer thickness and ‘x’ is the distance from the leading edge in the direction of flow).
[A].

Re

[B].

Re

[C].

1/Re

[D].

Re-1/2

Answer: Option D

Explanation:

No answer description available for this question.

Fluidised beds are formed, when the

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Question: Fluidised beds are formed, when the
[A].

fluid friction is zero

[B].

gravity force is less than the fluid friction.

[C].

pressure forces equal gravity forces.

[D].

sum of the fluid friction and pressure forces is equal and opposite to gravity forces.

Answer: Option B

Explanation:

No answer description available for this question.