Virtual Labs

Coefficient of discharge of given Venturi meter

1. Relation of length of converging cone of ventri meter, where D is diameter of inlet and d is diameter of throat:

a: 2(D-d) Explanation

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b: 2Dd Explanation

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c: 2.7(D-d) Explanation

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d: 2(D-d)D Explanation

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2. If specific gravity of a liquid is 0.78 and manometer head is 20 cm. Find the difference of pressure head. (Specific gravity of Hg = 13.6)

a: 3.28 m Explanation

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b: 4.28 m Explanation

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c: 2.82 m Explanation

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d: 3.78 m Explanation

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3. Bernoulli equation is summation of pressure head, velocity head and datum head

a: True Explanation

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b: False Explanation

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4. For Venturi meter, the coefficient of discharge range is:

a: Greater than 0.90 Explanation

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b: Between 0.8 and 0.9 Explanation

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c: Between 0.7 and 0.8 Explanation

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d: Less than 0.7 Explanation

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5. The coefficient of discharge of a venturi meter:

a: increase with increase in Reynolds number Explanation

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b: decrease with decrease in Reynolds number Explanation

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c: increase upto certain value of Reynold’s number and then becomes constant Explanation

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d: does not vary with Reynolds number Explanation

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6. The divergent portion of a Venturi meter is made longer than convergent portion to prevent:

a: Frictional losses Explanation

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b: Flow separation Explanation

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c: Velocity increase Explanation

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d: Energy loss Explanation

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7. The pressure is maximum at ____________ in a venturi meter.

a: At inlet Explanation

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b: Midpoint of convergent part Explanation

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c: Midpoint of throat Explanation

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d: Midpoint of diverging part Explanation

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8. Angle of divergent part of Venturi meter is __________ than that of convergent part.

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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9. Discharge co-efficient (C_d) is defined as:

a: Q_act- Q_theroitical Explanation

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b: Q_act+Q_theroitical Explanation

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c: Q_act/Q_theroitical Explanation

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d: Q_act*Q_theroitical Explanation

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10. The velocity of liquid at throat is ________ than that of inlet in venturi meter.

a: Less Explanation

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b: Equal Explanation

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c: Greater Explanation

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d: None of these Explanation

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