Home / Mechanical Engineering / Hydraulics and Fluid Mechanics :: section-5

Mechanical Engineering :: Hydraulics and Fluid Mechanics

  1. Guide angle as per the aerofoil theory of Kaplan turbine blade design is defined as the angle between

  2. A.

     Lift and resultant force

    B.

     Drag and resultant force

    C.

     Lift and tangential force

    D.

     Lift and drag


  3. Which of the following hydraulic unit is used for transmitting increased or decreased torque to the driven shaft?

  4. A.

     Hydraulic ram

    B.

     Hydraulic intensifier

    C.

     Hydraulic torque converter

    D.

     Hydraulic accumulator


  5. The hydraulic efficiency of an impulse turbine is maximum when velocity of wheel is _______ of the jet velocity,

  6. A.

     One-fourth

    B.

     One-half

    C.

     Three-fourth

    D.

     Double


  7. In a forced vortex, the velocity of flow everywhere within the fluid is

  8. A.

     Maximum

    B.

     Minimum

    C.

     Zero

    D.

     Nonzero finite


  9. The maximum efficiency of transmission through a pipe is

  10. A.

     50 %

    B.

     56.7 %

    C.

     66.67 %

    D.

     76.66 %


  11. The units of kinematic viscosity are

  12. A.

     cm²/sec

    B.

     kg sec/metre

    C.

     Newton-sec per metre

    D.

     Newton-sec per metre


  13. The efficiency of power transmission through pipe is (where H = Total supply head, and hf = Head lost due to friction in the pipe)

  14. A.

     (H - hf )/H

    B.

     H/(H - hf )

    C.

     (H + hf )/H

    D.

     H/(H + hf )


  15. Cavitation is caused by

  16. A.

     High velocity

    B.

     High pressure

    C.

     Weak material

    D.

     Low pressure


  17. An open tank containing liquid is moving with an acceleration on an inclined plane. The inclination of the free surface of the liquid will be __________ to the acceleration of the tank.

  18. A.

     Equal to

    B.

     Directly proportional

    C.

     Inversely proportional

    D.

     None of these


  19. The pressure of fluid due to hammer blow is

  20. A.

     Directly proportional to density of fluid

    B.

     Inversely proportional to density of fluid

    C.

     Directly proportional to (density)1/2 of fluid

    D.

     Inversely proportional to (density)1/2 of fluid