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  • Question

  • 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

  • Correct Answer
  • one-third 

    • Hydraulics and Fluid Mechanics problems

    Search Results

    • 1. 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
    • 2. The torque required to overcome viscous resistance of a collar bearing is (where R1 and R2 = External and internal radius of collar)

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 3. A point, in a compressible flow where the velocity of fluid is zero, is called

    • Options
    • A. critical point
    • B. vena contracta
    • C. stagnation point
    • D. none of these
      • Discuss
    • 4. In case of flow through parallel pipes,

    • Options
    • A. the head loss for all the pipes is same
    • B. the total discharge is equal to the sum of discharges in the various pipes
    • C. the total head loss is the sum of head losses in the various pipes
    • D. Both (A) and (B)
      • Discuss
    • 5. An internal mouthpiece is said to be running free if the length of the mouthpiece is __________ the diameter of the orifice.

    • Options
    • A. less than twice
    • B. more than twice
    • C. less than three times
    • D. more than three times
      • Discuss
    • 6. 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
    • 7. 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
    • 8. 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
    • 9. The dynamic viscosity of the liquid __________ with rise in temperature.

    • Options
    • A. remain unaffected
    • B. increases
    • C. decreases
      • Discuss
    • 10. The flow at critical depth in an open channel is called torrential flow.

    • Options
    • A. Yes
    • B. No
      • Discuss

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