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Mechanical Engineering :: Hydraulics and Fluid Mechanics

  1. A jet of water discharging from a 40 mm diameter orifice has a diameter of 32 mm at its vena contracta. The coefficient of contraction is

  2. A.

    0.46

    B.

    0.64

    C.

    0.78

    D.

    0.87

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  3. According to Bazin's formula, the discharge over a rectangular weir is \(\sqrt{2g}\times H^\frac{3}{2}\) where m is equal to

  4. A.

    \( 0.405 + \frac { 0.003} { H }\)

    B.

    \( 0.003 + \frac { 0.405} { H }\)

    C.

    \( 0.405 + \frac { H }{0.003}\)

    D.

    \( 0.003 + \frac { H }{ 0.405}\)

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  5. A vertical wall is subjected to a pressure due to one kind of liquid, on one of its sides. Which of the following statement is correct?

  6. A.

    The pressure on the wall at the liquid level is minimum.

    B.

    The pressure on the bottom of the wall is maximum.

    C.

    The pressure on the wall at the liquid level is zero, and on the bottom of the wall is maximum

    D.

    The pressure on the bottom of the wall is zero.

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  7. Water is a __________ fluid.

  8. A.

    real

    B.

    ideal

    C.

    newtonian

    D.

    non-newtonian

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  9. The celerity (velocity) of a pressure wave in a fluid is given by (where K = Bulk modulus, and ρ = Density of the fluid)

  10. A.

    \(\sqrt{K.\rho}\)

    B.

    \(\sqrt{K/\rho}\)

    C.

    \(\sqrt{\rho/K}\)

    D.

    \(K.\rho\)

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