NEET Physics: streamline and turbulent flow Practice Questions
12 free multiple-choice questions on streamline and turbulent flow (Properties of Solids and Liquids) for NEET Physics, each with the correct answer and a step-by-step explanation. Attempt a question, then reveal the solution to check your reasoning.
Practice thousands more NEET questions in the app →Q1. Flow of a fluid where the streamlines are parallel and follow smooth, predictable paths is known as:
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Correct answer: C — Laminar flow
Laminar flow is characterized by smooth, orderly flow where fluid particles move in parallel layers, minimizing mixing.
Q2. Which physical property of a fluid is primarily responsible for internal friction and resistance to flow?
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Correct answer: C — Viscosity
Viscosity is the measure of a fluid's resistance to flow, representing internal friction.
Q3. Which condition most strongly favors the establishment of a smooth, layered flow pattern?
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Correct answer: B — Low viscosity and low velocity
Laminar flow occurs when viscous forces dominate inertial forces, typically associated with lower velocities and lower Reynolds numbers, allowing smooth layering.
Q4. In the context of fluid dynamics, what does a streamline represent?
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Correct answer: D — The path taken by a single fluid particle
A streamline is an imaginary line representing the direction of the fluid velocity at any given point.
Q5. In laminar flow, the velocity profile across a pipe is generally:
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Correct answer: C — Uniform and smooth
Laminar flow exhibits a smooth, parabolic (or nearly linear, depending on geometry) velocity profile, indicating orderly movement.
Q6. In the flow of a viscous fluid through a pipe, the phenomenon where the flow pattern becomes highly irregular and chaotic, characterized by eddies and vortices, is known as:
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Correct answer: A — Turbulent flow
Turbulent flow is characterized by chaotic, irregular motion with eddies and vortices, which results from the mixing and irregular interaction of fluid layers.
Q7. The transition from streamline (laminar) flow to turbulent flow is often governed by the value of which dimensionless number?
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Correct answer: A — Reynolds number
The Reynolds number (Re) is the primary dimensionless number used to predict whether flow in a pipe or channel will be laminar or turbulent.
Q8. Flow characterized by smooth, orderly movement with no macroscopic mixing is known as:
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Correct answer: B — Laminar flow
Laminar flow is a smooth, orderly flow where fluid particles move in parallel layers.
Q9. When flow becomes highly turbulent, the velocity distribution generally becomes:
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Correct answer: B — Highly non-uniform with intense local fluctuations
Turbulent flow is characterized by intense local fluctuations in velocity, leading to a highly non-uniform velocity distribution with significant mixing.
Q10. What is the fundamental difference between streamline and actual fluid path?
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Correct answer: D — Streamlines represent the idealized path, while actual paths account for viscous effects
Streamlines are mathematical constructs representing the flow direction, while the actual path taken by a fluid element is modified by viscosity and external forces.
Q11. High velocity differences between adjacent fluid layers are a primary cause for the development of:
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Correct answer: C — Turbulent flow
Large velocity gradients often lead to flow separation and the onset of turbulent behavior.
Q12. In fully developed turbulent flow, the velocity profile across the flow direction is generally characterized by:
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Correct answer: D — A parabolic profile
Turbulent flow results in a flatter velocity profile compared to laminar flow, where the velocity distribution is less strictly parabolic (though the parabolic profile is characteristic of fully developed viscous flows).
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