Virtual Labs

“1.” Dynamic pressure is defined as:

a: (ρV²)/2 Explanation

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b: (3ρV²)/2 Explanation

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c: ρV/2 Explanation

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d: (ρV²)/4 Explanation

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“2.” Pressure term in Bernoulli’s equation is:

a: Static pressure Explanation

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b: Stagnation pressure Explanation

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c: Dynamic pressure Explanation

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d: Static and Dynamic pressure Explanation

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“3.” Stagnation pressure is defined as:

a: P_total + (ρV²)/2 Explanation

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b: P_static+ (ρV²)/2 Explanation

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c: P_static+ ρV/2 Explanation

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d: P_total+ ρV/2 Explanation

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“4.” Assumption of flow in Bernoulli’s theorem is that the flow is:

a: Steady Explanation

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b: Irrotational Explanation

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c: Frictionless Explanation

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d: All of these Explanation

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“5.” Bernoulli’s equation holds true only for .

a: low viscosity and incompressible fluid in turbulent flow Explanation

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b: low viscosity and compressible fluid in turbulent flow Explanation

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c: low viscosity and incompressible fluid in streamline flow Explanation

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d: high viscosity and incompressible fluid in streamline Explanation

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“6.” In a horizontal pipe when water is not flowing, the pressure is 3x10⁵ Pa. When water starts flowing pressure falls to 2.5x10⁵ Pa. What is the flow velocity of water?

a: 5 m/s Explanation

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b: 10 m/s Explanation

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c: 20 m/s Explanation

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d: 15 m/s Explanation

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“7.” Magnus effect is based on:

a: Poiseuille’s Law Explanation

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b: Newton’s Law Explanation

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c: Euler’s Law Explanation

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d: Bernoulli’s Law Explanation

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“8.” In which of the following conditions can the Bernoulli’s equation not be used?

a: Viscous flow Explanation

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b: Incompressible fluid Explanation

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c: Laminar flow Explanation

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d: Uniform flow Explanation

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“9.” Incompressible flow is when:

a: Change in viscosity of fluid is negligible Explanation

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b: Change in thermal properties of fluid is negligible Explanation

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c: Change in density of fluid is negligible Explanation

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d: Change in density of fluid is large Explanation

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“10.” Inviscid flow assumes that:

a: Thermal forces are negligible Explanation

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b: Thermal forces are large Explanation

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c: Viscous effects are negligible Explanation

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d: Viscous effects are large Explanation

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Verifying Bernoulli's energy equation