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Mechanical Engineering :: Hydraulics and Fluid Mechanics in ME

  1. Which type of the pump is different from others in the same group?

  2. A.

     Screw pump

    B.

     Gear pump

    C.

     Cam and piston pump

    D.

     Plunger pump


  3. Cavitation will begin when

  4. A.

     The pressure at any location reaches an absolute pressure equal to the saturated vapour pressure of the liquid

    B.

     Pressure becomes more than critical pressure

    C.

     Flow is increased

    D.

     Pressure is increased


  5. The coefficient of discharge for an external mouthpiece is

  6. A.

     0.375

    B.

     0.5

    C.

     0.707

    D.

     0.855


  7. The intensity of pressure on an immersed surface __________ with the increase in depth.

  8. A.

     Does not change

    B.

     Increases

    C.

     Decreases

    D.

     None of these


  9. The efficiency of a Pelton wheel working under constant head ________ with the increase in power.

  10. A.

     Remain same

    B.

     Increases

    C.

     Decreases

    D.

     None of these


  11. The static head of a centrifugal pump is equal to the _________ of suction head and delivery head.

  12. A.

     Product

    B.

     Difference

    C.

     Sum

    D.

     None of these


  13. The discharge through a convergent mouthpiece is __________ the discharge through an internal mouthpiece of the same diameter and head of water.

  14. A.

     Equal to

    B.

     One-half

    C.

     Three fourth

    D.

     Double


  15. A Piezometer tube is used only for measuring

  16. A.

     Low pressure

    B.

     High pressure

    C.

     Moderate pressure

    D.

     Vacuum pressure


  17. According to Manning's formula, the discharge through an open channel is (where M = Manning's constant)

  18. A.

     A × M × m1/2 × i2/3

    B.

     A × M × m2/3 × i1/2

    C.

     A1/2 × M2/3 × m × i

    D.

     A2/3 × M1/3 × m × i


  19. The ratio of the normal force of jet of water on a plate inclined at an angle of 30° as compared to that when the plate is normal to jet, is

  20. A.

     1/√2

    B.

     1/2

    C.

     1

    D.

     √2