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  • Question
  • 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

  • Correct Answer
  • incompressible 


  • Hydraulics and Fluid Mechanics problems


    Search Results


    • 1. The centre of buoyancy is the centre of area of the immersed body.

    • Options
    • A. Correct
    • B. Incorrect
    • Discuss
    • 2. 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
    • 3. The frequency of oscillation of a torsional pendulum is

    • Options
    • A.
    • B.
    • C.
    • D.
    • Discuss
    • 4. The triangle law of forces states that if two forces acting simultaneously on a particle, be represented in magnitude and direction by the two sides of a triangle taken in order, then their resultant may be represented in magnitude and direction by the third side of a triangle, taken in opposite order.

    • Options
    • A. True
    • B. False
    • Discuss
    • 5. If the resultant of two equal forces has the same magnitude as either of the forces, then the angle between the two forces is

    • Options
    • A. 30°
    • B. 60°
    • C. 90°
    • D. 120°
    • Discuss
    • 6. 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
    • 7. 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
    • 8. 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
    • 9. 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
    • 10. The maximum efficiency of transmission through a pipe is

    • Options
    • A. 50%
    • B. 56.7%
    • C. 66.67%
    • D. 76.66%
    • Discuss


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