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  • Question
  • The unit of dynamic viscosity in S.I. units is


  • Options
  • A. N-m/s2
  • B. N-s/m2
  • C. poise
  • D. stoke

  • Correct Answer
  • N-s/m2 


  • Hydraulics and Fluid Mechanics problems


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    • 1. The viscosity of a liquid is due to cohesion of its particles.

    • Options
    • A. Correct
    • B. Incorrect
    • Discuss
    • 2. An air vessel is provided at the summit in a syphon to

    • Options
    • A. avoid interruption in the flow
    • B. increase discharge
    • C. increase velocity
    • D. maintain pressure difference
    • Discuss
    • 3. A compound pipe of diameter d1, d2 and d3 having lengths l1, l2 and l3 is to be replaced by an equivalent pipe of uniform diameter d and of the same length (l) as that of the compound pipe. The size of the equivalent pipe is given by

    • Options
    • A.
    • B.
    • C.
    • D.
    • Discuss
    • 4. The length of the divergent cone in a venturimeter is __________ that of the convergent cone.

    • Options
    • A. equal to
    • B. double
    • C. three to four times
    • D. five to six times
    • Discuss
    • 5. If a body floating in a liquid does not return back to its original position, and heels farther "away when given a small angular displacement, the body is said to be in neutral equilibrium.

    • Options
    • A. Yes
    • B. No
    • Discuss
    • 6. The velocity corresponding to Reynold number of 2800, is called

    • Options
    • A. sub-sonic velocity
    • B. super-sonic velocity
    • C. lower critical velocity
    • D. higher critical velocity
    • Discuss
    • 7. A flow in which the viscosity of fluid is dominating over the inertia force is called

    • Options
    • A. steady flow
    • B. unsteady flow
    • C. laminar flow
    • D. turbulent flow
    • Discuss
    • 8. Laminar flow __________ place at very low velocities.

    • Options
    • A. takes
    • B. does not take
    • Discuss
    • 9. Bulk modulus of a fluid __________ as the pressure increases.

    • Options
    • A. remains same
    • B. decreases
    • C. increases
    • Discuss
    • 10. The Newton's law of resistance is based on the assumption that the

    • Options
    • A. planes of the body are completely smooth
    • B. space around the body is completely filled with the fluid
    • C. fluid particles do not exert any influence on one another
    • D. all of the above
    • Discuss


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