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Home ‣ Mechanical Engineering ‣ Hydraulics and Fluid Mechanics Comments
  • Question

  • The dynamic viscosity of the liquid __________ with rise in temperature.


  • Options
  • A. remain unaffected
  • B. increases
  • C. decreases

  • Correct Answer
  • decreases 

    • Hydraulics and Fluid Mechanics problems

    Search Results

    • 1. Whenever a plate is held immersed at some angle with the direction of flow of the liquid, it is subjected to some pressure. The component of this pressure, in the direction of flow of the liquid, is known as

    • Options
    • A. lift
    • B. drag
    • C. stagnation pressure
    • D. bulk modulus
      • Discuss
    • 2. A tank of uniform cross-sectional area (A) containing liquid upto height (H1) has an orifice of cross-sectional area (a) at its bottom. The time required to bring the liquid level from H1 to H2 will be

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 3. The increase in pressure at the outer edge of a drum of radius (r) completely filled up with liquid of density (?) and rotating at (?) rad/s is

    • Options
    • A. ? ?2 r2
    • B. 2? ?2 r2
    • C.
    • D.
      • Discuss
    • 4. The power transmitted through the nozzle is maximum when the head lost due to friction in the pipe is __________ of the total supply head.

    • Options
    • A. one-half
    • B. one-third
    • C. two-third
      • Discuss
    • 5. Barometer is used to measure

    • Options
    • A. velocity of liquid
    • B. atmospheric pressure
    • C. pressure in pipes and channels
    • D. difference of pressure between two points in a pipe
      • Discuss
    • 6. The flow at critical depth in an open channel is called torrential flow.

    • Options
    • A. Yes
    • B. No
      • Discuss
    • 7. The height of a water column equivalent to a pressure of 0.15 MPa is

    • Options
    • A. 15.3 m
    • B. 25.3 m
    • C. 35.3 m
    • D. 45.3 m
      • Discuss
    • 8. The sheet of water flowing over a notch or a weir is known as

    • Options
    • A. sill or crest
    • B. nappe or vein
    • C. orifice
    • D. none of these
      • Discuss
    • 9. The most efficient section of a channel is

    • Options
    • A. triangular
    • B. rectangular
    • C. square
    • D. trapezoidal
      • Discuss
    • 10. When a body, floating in a liquid, is given a small angular displacement, it starts oscillating about a point known as

    • Options
    • A. centre of pressure
    • B. centre of gravity
    • C. centre of buoyancy
    • D. metacentre
      • Discuss

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