Virtual Labs

1. A mouthpiece is primarily used to:

a: Measure fluid density Explanation

Explanation

b: Discharge liquid from a tank at a measurable rate Explanation

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c: Measure fluid viscosity Explanation

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d: Increase atmospheric pressure Explanation

Explanation

2. A mouthpiece is generally defined as an attachment whose length is:

a: Two to three times its diameter Explanation

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b: Equal to its diameter Explanation

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c: Ten times its diameter Explanation

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d: Less than half its diameter Explanation

Explanation

3. Which type of mouthpiece projects outward from the wall of a tank?

a: Internal mouthpiece Explanation

Explanation

b: Submerged mouthpiece Explanation

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c: External mouthpiece Explanation

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d: Convergent mouthpiece Explanation

Explanation

4. In a short cylindrical external mouthpiece, vena contracta forms:

a: Outside the mouthpiece and then expands to fill it Explanation

Explanation

b: At the outlet section only Explanation

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c: At the inlet section only Explanation

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d: Uniformly throughout the mouthpiece Explanation

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5. Replacing a convergent mouthpiece with a convergent-divergent mouthpiece generally causes the discharge to:

a: Remain unchanged Explanation

Explanation

b: Decrease Explanation

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c: Become zero Explanation

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d: Increase Explanation

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6. Which theorem forms the basis for analyzing flow through mouthpieces?

a: Archimedes' principle Explanation

Explanation

b: Bernoulli's theorem Explanation

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c: Pascal's law Explanation

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d: Newton's law of cooling Explanation

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7. Which type of mouthpiece possesses the highest coefficient of discharge?

a: External cylindrical mouthpiece Explanation

Explanation

b: Convergent mouthpiece Explanation

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c: Convergent-divergent mouthpiece Explanation

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d: Internal mouthpiece Explanation

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8. Flow through a mouthpiece differs from flow through an orifice mainly because:

a: The fluid density changes significantly Explanation

Explanation

b: The mouthpiece provides an additional length for flow development Explanation

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c: Gravity has no effect on mouthpiece flow Explanation

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d: Mouthpieces eliminate friction losses completely Explanation

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9. The coefficient of discharge of a mouthpiece is generally:

a: Greater than unity Explanation

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b: Equal to zero Explanation

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c: Infinite Explanation

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d: Less than unity Explanation

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Mouthpieces Experiment