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Mechanical Engineering :: Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME - section-1
  1. The normal stress in a fluid will be constant in all directions at a point only if

    2. A.

     It is incompressible
    B.

     It has uniform viscosity
    C.

     It has zero viscosity
    D.

     It is at rest

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  2. If the coefficient of discharge is 0.6, then the discharge over a right angled notch is

    3. A.

     0.417 H5/2
    B.

     1.417 H5/2
    C.

     4.171 H5/2
    D.

     7.141 H5/2

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  3. The maximum number of jets generally employed in impulse turbine without jet interference is

    4. A.

     4
    B.

     6
    C.

     8
    D.

     12

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  4. In order to measure the flow with a Venturimeter, it is installed in

    5. A.

     Horizontal line
    B.

     Inclined line with flow upwards
    C.

     Inclined line with flow downwards
    D.

     Any direction and in any location

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  5. The unit of viscosity is

    6. A.

     Meters² per sec
    B.

     kg-sec/meter
    C.

     Newton-sec per meter²
    D.

     Newton-sec per meter

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  6. If the net positive suction head (NPSH) requirement for the pump is not satisfied, then

    7. A.

     No flow will take place
    B.

     Cavitation will be formed
    C.

     Efficiency will be low
    D.

     Excessive power will be consumed

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  7. The theoretical velocity of jet at vena contracta is (where H = Head of water at vena contracta)

    8. A.

     2gH
    B.

     H × √(2g)
    C.

     2g × √H
    D.

     √(2gh)

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  8. A body floats in stable equilibrium

    9. A.

     When its meatcentric height is zero
    B.

     When the metacentre is above e.g.
    C.

     When its e.g. is below its center of buoyancy
    D.

     Metacentre has nothing to do with position of e.g. for determining stability

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  9. The meatcentric height is the distance between the

    10. A.

     Centre of gravity of the floating body and the centre of buoyancy
    B.

     Centre of gravity of the floating body and the metacentre
    C.

     Metacentre and centre of buoyancy
    D.

     Original centre of buoyancy and new centre of buoyancy

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  10. If no resistance is encountered by displacement, such a substance is known as

    11. A.

     Fluid
    B.

     Water
    C.

     Gas
    D.

     Ideal fluid

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