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Hydraulics and Fluid Mechanics problems


  • 1. The Bernoulli's equation is based on the assumption that

  • Options
  • A. there is no loss of energy of the liquid flowing
  • B. the velocity of flow is uniform across any cross-section of the pipe
  • C. no force except gravity acts on the fluid
  • D. all of the above
  • Discuss
  • 2. The centre of buoyancy is the centre of area of the immersed body.

  • Options
  • A. Correct
  • B. Incorrect
  • Discuss
  • 3. A flow in which the volume of a fluid and its density does not change during the flow is called __________ flow.

  • Options
  • A. incompressible
  • B. compressible
  • Discuss
  • 4. The loss of head due to an obstruction in a pipe is twice the loss of head at its entrance.

  • Options
  • A. Agree
  • B. Disagree
  • Discuss
  • 5. The discharge through a siphon spillway is

  • Options
  • A. Cd x a2gH
  • B. Cd x a2g x H3/2
  • C. Cd x a2g x H2
  • D. Cd x a2g x H5/2
  • Discuss
  • 6. The centre of gravity of the volume of the liquid displaced is called

  • Options
  • A. centre of pressure
  • B. centre of buoyancy
  • C. metacentre
  • D. none of these
  • Discuss
  • 7. In a free nappe,

  • Options
  • A. the pressure below the nappe is atmospheric
  • B. the pressure below the nappe is negative
  • C. the pressure above the nappe is atmospheric
  • D. the pressure above the nappe is negative
  • Discuss
  • 8. The maximum efficiency of transmission through a pipe is

  • Options
  • A. 50%
  • B. 56.7%
  • C. 66.67%
  • D. 76.66%
  • Discuss
  • 9. In a depressed nappe

  • Options
  • A. the pressure below the nappe is atmospheric
  • B. the pressure below the nappe is negative
  • C. the pressure above the nappe is atmospheric
  • D. the pressure above the nappe is negative
  • Discuss
  • 10. One litre of water occupies a volume of

  • Options
  • A. 100 cm3
  • B. 250 cm3
  • C. 500 cm3
  • D. 1000 cm3
  • Discuss

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