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  • Question

  • Hydraulic mean depth (Dm) for a circular pipe of diameter 'D' flowing full is 0.25 D. For a circular channel, at Dm = 0.3 D, gives the condition for the maximum


  • Options
  • A. flow rate
  • B. mean velocity
  • C. both 'a' & 'b'
  • D. neither 'a' nor 'b'

  • Correct Answer
  • mean velocity 

    • Fluid Mechanics problems

    Search Results

    • 1. Co-efficient of velocity is __________ the coefficient of discharge.

    • Options
    • A. less than
    • B. more than
    • C. equal to
    • D. not related to
      • Discuss
    • 2. Most commonly used joint in the underground pipe lines is the

    • Options
    • A. sleevejoint
    • B. coupling
    • C. flange
    • D. expansion joint
      • Discuss
    • 3. If the discharge of a centrifugal pump is throttled, then its suction lift

    • Options
    • A. increases
    • B. decreases
    • C. remains unchanged
    • D. data insufficient to predict
      • Discuss
    • 4. Buna-S is also known as

    • Options
    • A. teflon
    • B. PTFE
    • C. SBR
    • D. polycrylates
      • Discuss
    • 5. Which of the following is a copolymer?

    • Options
    • A. PVC
    • B. Bakelite
    • C. Polythene
    • D. Teflon
      • Discuss
    • 6. The drag co-efficient for a bacterium moving in water at 1 mm/s, will be of the following order of magnitude (assume size of the bacterium to be 1 micron and kinematic viscosity of water to be 10-6m2/s).

    • Options
    • A. 24000
    • B. 24
    • C. 0.24
    • D. 0.44
      • Discuss
    • 7. The velocity profile for turbulent flow through a closed conduit is

    • Options
    • A. logarithmic
    • B. parabolic
    • C. hyperbolic
    • D. linear
      • Discuss
    • 8. The pitot static tube does not measure the __________ pressure.

    • Options
    • A. static
    • B. total
    • C. difference in static & dynamic
    • D. all (a), (b) and (c)
      • Discuss
    • 9. The resistance wire used in a hot wire anemometer for conducting electrical current is made of

    • Options
    • A. copper
    • B. tungsten
    • C. chromium
    • D. aluminium
      • Discuss
    • 10. What is the normal range of exit cone angle of a venturimeter?

    • Options
    • A. 2 to 5
    • B. 7 to 15
    • C. 15 to 25
    • D. >25
      • Discuss

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