Pick up the correct statement from the following?

Related Mcqs:

1. Pick up the correct statement from the following ?

   A. The sewer pipes of sizes less than 0.4 m diameter are designed as running full at maximum discharge
   B. The sewer pipes of sizes greater than 0.4 m diameter are designed as running 2/3rd or 3/4th full at maximum discharge
   C. The minimum design velocity of sewer pipes is taken as 0.8 m/sec
   D. All the above

2. Pick up the correct statement from the following?

   A. The water supply pipes carry pure water free from solid particles
   B. The water supply pipes get clogged if flow velocity is less than self cleansing velocity
   C. The sewers may be carried up and down the hills and valleys
   D. The sewer pipes are generally laid along level hills

3. Pick up the correct statement from the following?

   A. The maximum rate of storm runoff is called peak drainage discharge
   B. Rational method of estimating peak run off, may be used precisely for areas less than 50 hectares
   C. The period after which the entire area starts contributing to the runoff, is called the time of concentration
   D. All the above

4. Pick up the correct statement from the following ?

   A. Rate of digestion of sludge is more at higher temperature
   B. Thermophilic organisms digest the sludge if the temperature ranges from 40° to 60°C
   C. Mesophilic organisms digest the sludge if the temperature is between 25° and 40°C
   D. All the above

5. Pick up the correct statement from the following ?

   A. The larger the sewer in size, more will be velocity
   B. The smaller the sewer in size, less will be velocity
   C. The larger the sewer in size, no deposition will take place
   D. The larger the sewer in size, deposition will take place

6. Pick up the correct statement from the following ?

   A. Turbidity is more in strong sewage
   B. The black colour indicates septic sewage
   C. The sewage omits offensive odours after four hours
   D. All the above

7. Pick up the correct statement from the following?

   A. The boning rod is used for checking the levels of the sewer inverts
   B. Manhole covers are made circular for the convenience of the cleaning staff
   C. A manhole is classified as shallow manhole if its depth is less than 0.9 m
   D. All the above

8. Pick up the correct statement from the following?

   A. pH value indicates acidity and alkalinity of sewage
   B. In acidic sewage, the pH value is less than 7
   C. In alkaline sewage, the pH value is more than 7
   D. All the above

9. Pick up the in-correct statement from the following?

   A. Manholes are provided in sewer pipes at suitable intervals
   B. Catch basins are generally provided in sewers for carrying drainage discharge
   C. Inlets are generally provided in all sewers
   D. None of these

10. Pick up the correct statement from the following?

    A. Anaerobic bacteria flourish in the absence of oxygen
    B. Aerobic bacteria flourish in the presence of oxygen
    C. Facultative bacteria flourish with or without oxygen
    D. All the above