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Mechanical Engineering :: Hydraulics and Fluid Mechanics

  1. The angle of contact in case of a liquid depends upon

  2. A.

     The nature of the liquid and the solid

    B.

     The material which exists above the free surface of the liquid

    C.

     Both of die above

    D.

     Any one of the above

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  3. The loss of head at exit of a pipe is (where v = Velocity of liquid in the pipe)

  4. A.

     v²/2g

    B.

     0.5v²/2g

    C.

     0.375v²/2g

    D.

     0.75v²/2g

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  5. The loss of head at entrance in a pipe is (where v = Velocity of liquid in the pipe)

  6. A.

     v²/2g

    B.

     0.5v²/2g

    C.

     0.375v²/2g

    D.

     0.75v²/2g

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  7. Whenever a plate is held immersed at some angle with the direction of flow of the liquid, it is subjected to some pressure. The component of this pressure, in the direction of flow of the liquid, is known as

  8. A.

     Lift

    B.

     Drag

    C.

     Stagnation pressure

    D.

     Bulk modulus

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  9. Euler's equation in the differential form for the motion of liquids is given by

  10. A.

     dp/ρ + g.dz + v.dv = 0

    B.

     dp/ρ - g.dz + v.dv = 0

    C.

     ρ.dp + g.dz + v.dv = 0

    D.

     ρ.dp - g.dz + v.dv = 0

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  11. A structure used to dam up a stream or river over which the water flows is called

  12. A.

     Orifice

    B.

     Notch

    C.

     Weir

    D.

     Dam

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  13. A centrifugal pump will start delivering liquid only when the pressure rise in the impeller is equal to the

  14. A.

     Kinetic head

    B.

     Velocity head

    C.

     Manometric head

    D.

     Static head

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  15. An internal mouthpiece is said to be running free if the length of the mouthpiece is __________ the diameter of the orifice.

  16. A.

     Less than twice

    B.

     More than twice

    C.

     Less than three times

    D.

     More than three times

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  17. An internal mouthpiece is said to be running __________ if the length of the mouthpiece is more than three times the diameter of the orifice.

  18. A.

     Free

    B.

     Partially

    C.

     Full

    D.

     None of these

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  19. Total pressure on a lmxlm gate immersed vertically at a depth of 2 m below the free water surface will be

  20. A.

     1000 kg

    B.

     4000 kg

    C.

     2000 kg

    D.

     8000 kg

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