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MCQs

Total Questions : 1556 | Page 155 of 156 pages
Question 1541. The normal values of over flow rates for sedimentation tanks using coagulant, ranges between__________________?
  1.    25,000 to 35,000 litres/sqm/day
  2.    40,000 to 50,000 litres/sqm/day
  3.    50,000 to 60,000 litres/sqm/day
  4.    80,000 to 100,000 litres/sqm/day
 Discuss Question
Answer: Option C. -> 50,000 to 60,000 litres/sqm/day
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1542. To prevent settling down of sewage both at the bottom and on the sides of a large sewer, self-cleaning velocity recommended for Indian conditions, is_________________?
  1.    0.50 m/sec
  2.    0.60 m/sec
  3.    0.70 m/sec
  4.    0.75 m/sec
 Discuss Question
Answer: Option D. -> 0.75 m/sec
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1543. Pick up the incorrect statement from the following for allowing workers to enter sewers_______________?
  1.    The particular manhole and one manhole on upstream and one manhole on downstream should remain open for 30 minutes
  2.    Proper tests for the presence of poisonous gases must be carried out
  3.    The men entering the manhole should be advised to smoke in the sewer
  4.    Warning signals should be erected
 Discuss Question
Answer: Option C. -> The men entering the manhole should be advised to smoke in the sewer
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1544. The discharge per unit plan area of a sedimentation tank, is generally called________________?
  1.    Over flow rate
  2.    Surface loading
  3.    Over flow velocity
  4.    All the above
 Discuss Question
Answer: Option D. -> All the above
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1545. The settling velocity of the particles larger than 0.06 mm in a settling tank of depth 2.4 is 0.33 m per sec. The detention period recommended for the tank, is____________________?
  1.    30 minutes
  2.    1 hour
  3.    1 hour and 30 minutes
  4.    2 hours
 Discuss Question
Answer: Option D. -> 2 hours
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1546. Pick up the correct statement from the following ?
  1.    Turbidity is more in strong sewage
  2.    The black colour indicates septic sewage
  3.    The sewage omits offensive odours after four hours
  4.    All the above
 Discuss Question
Answer: Option D. -> All the above
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1547. The gas which may cause explosion in sewers, is_________________?
  1.    Carbondioxide
  2.    Methane
  3.    Ammonia
  4.    Carbon monoxide
 Discuss Question
Answer: Option B. -> Methane
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1548. Pick up the correct statement from the following?
  1.    The boning rod is used for checking the levels of the sewer inverts
  2.    Manhole covers are made circular for the convenience of the cleaning staff
  3.    A manhole is classified as shallow manhole if its depth is less than 0.9 m
  4.    All the above
 Discuss Question
Answer: Option D. -> All the above
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1549. The layers of vegetable wastes and night soil alternatively piled above the ground to form a mound, is called_______________?
  1.    A heap
  2.    Plateau
  3.    Windrow
  4.    None of these
 Discuss Question
Answer: Option D. -> None of these
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1550. Pick up the correct statement from the following?
  1.    pH value indicates acidity and alkalinity of sewage
  2.    In acidic sewage, the pH value is less than 7
  3.    In alkaline sewage, the pH value is more than 7
  4.    All the above
 Discuss Question
Answer: Option D. -> All the above
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

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