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Mechanical Engineering :: Hydraulics and Fluid Mechanics in ME

  1. When the flow in an open channel is gradually varied, the flow is said to be

  2. A.

     Steady uniform flow

    B.

     Steady non-uniform flow

    C.

     Unsteady uniform flow

    D.

     Unsteady non-uniform flow


  3. When the flow parameters at any given instant remain same at every point, then flow is said to be

  4. A.

     Quasi-static

    B.

     Steady state

    C.

     Laminar

    D.

     Uniform


  5. The water in a jet propelled boat is drawn through the openings facing the direction of motion of the boat. The efficiency of propulsion is given by

  6. A.

     2V/(vr - v)

    B.

     2V/(vr + v)

    C.

     V/(vr - v)

    D.

     V/(vr + v)


  7. The atmospheric pressure with rise in altitude decreases

  8. A.

     Linearly

    B.

     First slowly and then steeply

    C.

     First steeply and then gradually

    D.

     Unpredictable


  9. An ideal flow of any fluid must satisfy

  10. A.

     Pascal law

    B.

     Newton's law of viscosity

    C.

     Boundary layer theory

    D.

     Continuity equation


  11. The bulk modulus of elasticity

  12. A.

     Has the dimensions of 1/pressure

    B.

     Increases with pressure

    C.

     Is large when fluid is more compressible

    D.

     Is independent of pressure and viscosity


  13. Gradually varied flow is

  14. A.

     Steady uniform

    B.

     Non-steady non-uniform

    C.

     Non-steady uniform

    D.

     Steady non-uniform


  15. Which of the following pump is generally used to pump highly viscous fluid?

  16. A.

     Centrifugal pump

    B.

     Reciprocating pump

    C.

     Air lift pump

    D.

     Screw pump


  17. A hydraulic accumulator is a device used to store _________ energy which may be supplied to a machine later on.

  18. A.

     Strain

    B.

     Pressure

    C.

     Kinetic

    D.

     None of these


  19. A hydraulic accumulator normally consists of

  20. A.

     Two cylinders, two rams and a storage device

    B.

     A cylinder and a ram

    C.

     Two coaxial rams and two cylinders

    D.

     A cylinder, a piston, storage tank and control valve