Show:
GROUP 1
GROUP 2
GROUP 3
100

The Venturi meter is used to measure which of the following?

  • a) Pressure of a fluid
  • b) Velocity of a fluid
  • c) Density of a fluid
  • d) Flow rate of a fluid

Answer: d) Flow rate of a fluid

100

Which principle is the Venturi meter based on?

  • a) Archimedes’ principle
  • b) Bernoulli’s principle
  • c) Pascal's law
  • d) Newton's third law

Answer: b) Bernoulli’s principle

100

Where is the pressure in a Venturi meter the lowest?

  • a) Inlet section
  • b) Converging section
  • c) Throat section
  • d) Diverging section

Answer: c) Throat section

200

In a Venturi meter, if the cross-sectional area of the throat is reduced, the fluid velocity at the throat will:

  • a) Decrease
  • b) Remain the same
  • c) Increase
  • d) Become zero

Answer: c) Increase

200

What role does the throat of the Venturi meter play in measuring flow rate?

  • a) It increases the pressure of the fluid.
  • b) It decreases the fluid velocity.
  • c) It helps calculate the velocity by measuring pressure drop.
  • d) It maintains constant fluid density.

Answer: c) It helps calculate the velocity by measuring pressure drop.

200

Which of the following equations is essential to the working of a Venturi meter?

  • a) Continuity equation and Boyle’s law
  • b) Bernoulli’s equation and continuity equation
  • c) Newton's first law and continuity equation
  • d) Archimedes' principle and Bernoulli’s equation

Answer: b) Bernoulli’s equation and continuity equation

300

If the pressure at the throat of a Venturi meter is 30 kPa and at the inlet is 45 kPa, which of the following could be concluded about the velocity of fluid at the throat compared to the inlet?

  • a) It is higher.
  • b) It is lower.
  • c) It is the same.
  • d) It depends on fluid density.

Answer: a) It is higher

300

The Venturi effect observed in a Venturi meter shows a relationship between velocity and pressure. Which statement best describes this effect?

  • a) Higher velocity corresponds to higher pressure.
  • b) Higher velocity corresponds to lower pressure.
  • c) Velocity and pressure are unrelated.
  • d) Lower velocity corresponds to lower pressure.

Answer: b) Higher velocity corresponds to lower pressure

300

If the fluid density remains constant, and the area of the throat is reduced by half, how does the velocity at the throat change relative to the inlet velocity?

  • a) It doubles.
  • b) It halves.
  • c) It remains the same.
  • d) It quadruples.

Answer: a) It doubles

400

In a Venturi meter, the diameter of the inlet section is twice the diameter of the throat. If the fluid flow velocity at the inlet is 2 m/s, calculate the velocity at the throat, assuming incompressible flow.

  • a) 1 m/s
  • b) 2 m/s
  • c) 4 m/s
  • d) 8 m/s

Answer: c) 4 m/s

400

For a Venturi meter operating under ideal conditions, if the radius of the inlet is 10 cm and that of the throat is 5 cm, what would be the ratio of velocity at the throat to velocity at the inlet?

  • a) 1:4
  • b) 2:1
  • c) 4:1
  • d) 1:2

Answer: c) 4:1

400

The pressure difference in a Venturi meter increases with which of the following changes?

  • a) Decreasing fluid velocity
  • b) Increasing throat area
  • c) Increasing fluid velocity
  • d) Decreasing inlet area

Answer: c) Increasing fluid velocity

500

If a Venturi meter is used to measure the flow rate of water with a density of 1000 kg/m³, and the pressure difference measured between the inlet and the throat is 20 kPa, what is the velocity of water at the throat, given that the cross-sectional area ratio between inlet and throat is 4:1?

  • a) 1.6 m/s
  • b) 2.8 m/s
  • c) 4 m/s
  • d) 5.6 m/s

Answer: c) 4 m/s

500

In a Venturi meter, if the diameter of the inlet is 20 cm and that of the throat is 10 cm, what would be the resulting factor change in pressure, assuming no energy loss?

  • a) The pressure quadruples
  • b) The pressure reduces by half
  • c) The pressure increases by a factor of 4
  • d) The pressure reduces by a factor of 4

Answer: d) The pressure reduces by a factor of 4

500

A Venturi meter with an inlet diameter of 6 cm and a throat diameter of 3 cm measures a pressure difference of 5000 Pa in water. What is the flow rate through the pipe, assuming no energy loss?

  • a) 0.5 L/s
  • b) 1 L/s
  • c) 1.5 L/s
  • d) 2 L/s

Answer: b) 1 L/s