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Mechanical Engineering :: Hydraulics and Fluid Mechanics

  1. A glass tube of small diameter (d) is dipped in fluid. The height of rise or fall in the tube given by (where w = Specific weight of liquid, α = Angle of contact of the liquid surface, and σ = Surface tension)

  2. A.

    \(\frac { 4wd } { \sigma cos a }\)

    B.

    \(\frac { \sigma cos a } { 4wd } \)

    C.

    \(\frac {4 \sigma cos a } { wd } \)

    D.

    \(\frac { wd } { 4 \sigma cos a } \)


  3. An internal mouthpiece is said to be running free if the length of the mouthpiece is __________ the diameter of the orifice.

  4. A.

    less than twice

    B.

    more than twice

    C.

    less than three times

    D.

    more than three times


  5. The volume of a fluid __________ as the pressure increases.

  6. A.

    remains same

    B.

    decreases

    C.

    increases


  7. The pressure of the liquid flowing through the divergent portion of a venturimeter

  8. A.

    remains constant

    B.

    increases

    C.

    decreases

    D.

    depends upon mass of liquid


  9. The vacuum pressure can be measured with the help of a piezometer tube.

  10. A.

    True

    B.

    False