Virtual Labs

Determination Discharge Coefficient for flow through an Orifice

1. An Orifice meter is used to measure:

a: Pressure difference of liquid flowing between two locations in a pipe line Explanation

Explanation

b: Discharge of liquid flowing in a pipe Explanation

Explanation

c: Measure the velocity of a flowing liquid Explanation

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d: Measure the pressure of a flowing liquid Explanation

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2. An Orifice meter has _____________ energy loss compared to Venturi:

a: Less Explanation

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b: Greater Explanation

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c: Equal Explanation

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d: Less or equal Explanation

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3. In the case of flow-through orifices, the coefficient of velocity at vena contract is:

a: Equal to zero Explanation

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b: More than one Explanation

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c: Less than one Explanation

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d: Equal to one Explanation

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4. Discharge Co-efficient (Cd) for an Orifice ranges from:

a: 0.5 < Cd < 0.6answer1 Explanation

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b: 0.6 < Cd < 0.65 Explanation

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c: 0.65 < Cd < 0.8answer3 Explanation

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d: Cd > 0.8 Explanation

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5. Cavitation occurs in an orifice if pressure goes ____________________:

a: Below liquid vapor pressure Explanation

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b: Above liquid vapor pressureanswer2 Explanation

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c: Equal to liquid vapor pressure Explanation

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d: Either above and below Explanation

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6. Advantage of an Orifice meter over a Venturi meter is:

a: Cost effective Explanation

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b: Easy installation Explanation

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c: Low maintenance Explanation

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d: Less energy losses Explanation

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7. An Orifice meter reading are more accurate than that of Venturi meter

a: True Explanation

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b: False Explanation

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8. Bernoulli equation is based on:

a: Conservation of energy Explanation

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b: Conservation of mass Explanation

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c: Both (a) and (b) Explanation

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d: Conservation of momentum Explanation

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9. Liquid flow rate in large sized pipes can be measured using:

a: Speedometer Explanation

Explanation

b: Lactometer Explanation

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c: Orifice meter Explanation

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d: Elbow meter Explanation

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10. Assumptions for Bernoulli’s equation:

a: Incompressible Explanation

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b: Non-viscous Explanation

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c: Steady-State Explanation

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d: All of these Explanation

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