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Mechanical Engineering :: Hydraulics and Fluid Mechanics in ME

  1. The efficiency of a hydraulic press is given by (where W = Weight lifted by ram, P = Force applied on plunger, A = Area of ram, and a = Area of plunger)

  2. A.

     (W/p) × (A/a)

    B.

     (p/W) × (a/A)

    C.

     (W/p) × (a/A)

    D.

     (p/W) × (A/a)


  3. An object having 10 kg mass weighs 9.81 kg on a spring balance. The value of 'g' at this place is

  4. A.

     10 m/sec²

    B.

     9.81 m/sec²

    C.

     9.75 m/sec²

    D.

     9 m/sec


  5. The coefficient of viscosity may be determined by

  6. A.

     Capillary tube method

    B.

     Orifice type viscometer

    C.

     Rotating cylinder method

    D.

     All of these


  7. The region between the separation streamline and the boundary surface of the solid body is known as

  8. A.

     Wake

    B.

     Drag

    C.

     Lift

    D.

     Boundary layer


  9. The horizontal component of buoyant force is

  10. A.

     Negligible

    B.

     Same as buoyant force

    C.

     Zero

    D.

     None of the above


  11. Puck up the wrong statement about centrifugal pump

  12. A.

     Discharge a diameter

    B.

     Head a speed²

    C.

     Head a diameter

    D.

     Power a speed⁴


  13. The length of the divergent cone in a Venturimeter is __________ that of the convergent cone.

  14. A.

     Equal to

    B.

     Double

    C.

     Three to four times

    D.

     Five to six times


  15. Normal depth in open channel flow is the depth of flow corresponding to

  16. A.

     Steady flow

    B.

     Unsteady flow

    C.

     Laminar flow

    D.

     Uniform flow


  17. The discharge of a double acting reciprocating pump is (where L = Length of stroke, A = Cross-sectional area of piston, and N = Speed of crank in r.p.m.)

  18. A.

     L.A.N

    B.

     2 L.A.N

    C.

     (L.A.N)/60

    D.

     (2 L.A.N)/60


  19. A flow whose streamline is represented by a curve, is called

  20. A.

     One-dimensional flow

    B.

     Two-dimensional flow

    C.

     Three-dimensional flow

    D.

     Four-dimensional flow