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  • Question

  • R.M.O. expenses include


  • Options
  • A. running expenses
  • B. maintenance expenses
  • C. operation expenses
  • D. all the above.

  • Correct Answer
  • all the above. 

    • Waste Water Engineering problems

    Search Results

    • 1. The Brake Horse power of the motor (efficiency 60%) required for a pump of capacity 0.075 cumec for a total lift of 12 m, is

    • Options
    • A. 10
    • B. 15
    • C. 20
    • D. 25
      • Discuss
    • 2. The flow velocity in detritus tanks is

    • Options
    • A. 0.05 m/sec
    • B. 0.09 m/sec
    • C. 1.25 m/sec
    • D. none of these.
      • Discuss
    • 3. Cement concrete sewers are only suitable if non-scouring velocity is between

    • Options
    • A. 2.5 to 3.0 m/sec
    • B. 3.0 to 4.0 m/sec
    • C. 3.5 to 4.5 m/sec
    • D. 4.5 to 5.5 m/sec.
      • Discuss
    • 4. Which of the following pumps in used to pump sewage solids with liquid sewage without clogging the pump is

    • Options
    • A. centrifugal pump
    • B. pneumatic ejector
    • C. reciprocating pump
    • D. none of these.
      • Discuss
    • 5. In Chezy's formula V = C rs for calculating the velocity of flow in circular sewer of diameter D running full, the value of hydraulic mean radius is

    • Options
    • A. D
    • B.
    • C.
    • D.
    • E.
      • Discuss
    • 6. If the flame of a miner's safety lamp in a manhole extinguishes within 5 minutes, the sewer certainly contains

    • Options
    • A. Hydrogen sulphide
    • B. Carbon dioxide
    • C. Methane
    • D. Oxygen
    • E. None of these.
      • Discuss
    • 7. A cylindrical ejector having its height 2 m fills after every 10 minutes with a peak sewage discharge of 0.0157 cumec. The diameter of the ejector chamber, is

    • Options
    • A. 2.30 m
    • B. 2.40 m
    • C. 2.45 m
    • D. 2.50 m.
      • Discuss
    • 8. The coagulant which is generally not used for treating the sewage, is

    • Options
    • A. alum
    • B. ferric chloride
    • C. ferric sulphate
    • D. chlorinated copperas.
      • Discuss
    • 9. If the flame of a miner's safety lamp in the upper layers of the sewer forms an explosive, the sewer certainly contains

    • Options
    • A. Hydrogen sulphide
    • B. Carbon dioxide
    • C. Methane
    • D. Oxygen
    • E. None of these.
      • Discuss
    • 10. The sewer that unloads the sewage at the point of treatment is called

    • Options
    • A. main sewer
    • B. outfall sewer
    • C. branch sewer
    • D. house sewer.
      • Discuss

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