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  • Question
  • The factional resistance of a pipe varies approximately with __________ of the liquid.


  • Options
  • A. pressure
  • B. velocity
  • C. square of velocity
  • D. cube of velocity

  • Correct Answer
  • square of velocity 


  • Hydraulics and Fluid Mechanics problems


    Search Results


    • 1. The point at which the resultant pressure on an immersed surface acts, is known as

    • Options
    • A. centre of gravity
    • B. centre of depth
    • C. centre of pressure
    • D. centre of immersed surface
    • Discuss
    • 2. If the coefficient of discharge is 0.6, then the discharge over a right angled notch is

    • Options
    • A. 0.417 H5/2
    • B. 1.417 H5/2
    • C. 4.171 H5/2
    • D. 7.141 H5/2
    • Discuss
    • 3. According to Bazin's formula, the discharge over a rectangular weir is mL2g x H3/2 where m is equal to

    • Options
    • A.
    • B.
    • C.
    • D.
    • Discuss
    • 4. The discharge through a wholly drowned orifice is given by (where H1 = Height of water (on the upstream side) above the top of the orifice, H2 = Height of water (on the downstream side) above the bottom of the orifice, and H = Difference between two water levels on either side of the orifice)

    • Options
    • A. Q = Cd x bH1 2gh
    • B. Q = Cd x bH2 2gh
    • C. Q = Cd x b ( H2 - H1 ) 2gh
    • D. Q = Cd x bH 2gh
    • Discuss
    • 5. The mass of 2.5 m3 of a certain liquid is 2 tonnes. Its mass density is

    • Options
    • A. 200 kg/m3
    • B. 400 kg/m3
    • C. 600 kg/m3
    • D. 800 kg/m3
    • Discuss
    • 6. A flow through a long pipe at decreasing rate is called __________ uniform flow.

    • Options
    • A. steady
    • B. unsteady
    • Discuss
    • 7. The total energy of a liquid particle in motion is equal to

    • Options
    • A. pressure energy + kinetic energy + potential energy
    • B. pressure energy - (kinetic energy + potential energy)
    • C. potential energy - (pressure energy + kinetic energy
    • D. kinetic energy - (pressure energy + potential energy)
    • Discuss
    • 8. The celerity (velocity) of a pressure wave in a fluid is given by (where K = Bulk modulus, and ? = Density of the fluid)

    • Options
    • A. K.?
    • B. K/?
    • C. ?/K
    • D. K.?
    • Discuss
    • 9. The hydraulic gradient line is always parallel to the centre line of the pipe.

    • Options
    • A. Correct
    • B. Incorrect
    • Discuss
    • 10. The volume of a fluid __________ as the pressure increases.

    • Options
    • A. remains same
    • B. decreases
    • C. increases
    • Discuss


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