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Mechanical Engineering :: Hydraulics and Fluid Mechanics

  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

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  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

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  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)

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  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

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  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

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  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

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  13. Gradually varied flow is

  14. A.

     Steady uniform

    B.

     Non-steady non-uniform

    C.

     Non-steady uniform

    D.

     Steady non-uniform

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  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

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  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

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  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

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