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MCQs

Total Questions : 1556 | Page 154 of 156 pages
Question 1531. Imhoff cone is used to measure________________?
  1.    Total organic solids
  2.    Total solids
  3.    Total in organic solids
  4.    Settleable solids
 Discuss Question
Answer: Option D. -> Settleable solids
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1532. For the COD test of sewage, organic matter is oxidised by K2Cr2O7 in the presence of________________?
  1.    H2SO4
  2.    HNO3
  3.    HCl
  4.    None of these
 Discuss Question
Answer: Option A. -> H2SO4
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1533. If the flame of a miner’s safety lamp in a manhole extinguishes within 5 minutes, the sewer certainly contains_______________?
  1.    Hydrogen sulphide
  2.    Carbon dioxide
  3.    Methane
  4.    Oxygen
 Discuss Question
Answer: Option B. -> Carbon dioxide
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1534. The sewage treatment units in which anaerobic decomposition of organic matter is used, are called________________?
  1.    Imhoff tanks
  2.    Trickling filters
  3.    Sludge sedimentation tanks
  4.    None of these
 Discuss Question
Answer: Option B. -> Trickling filters
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1535. If the depth of flow in a circular sewer is 1/4th of its diameter D, the wetted perimeter is______________?
  1.    ΠD/2
  2.    ΠD/4
  3.    ΠD/3
  4.    πD
 Discuss Question
Answer: Option C. -> ΠD/3
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1536. If q is the average sewage flow from a city of population P, the maximum sewage flow______________?
  1.    Q = [(4 + )/(18 + )] q
  2.    Q = [(18 + P)/(4 + )] q
  3.    Q = [(18 + )/(4 + )] q
  4.    Q = [(5 + )/((15 + )] q
 Discuss Question
Answer: Option C. -> Q = [(18 + )/(4 + )] q
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1537. At the junction of sewers___________________?
  1.    Top of smaller sewer is kept lower
  2.    Top of larger sewer is kept lower
  3.    Tops of both the sewers are at the same level
  4.    None of these
 Discuss Question
Answer: Option D. -> None of these
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1538. For a grit chamber, if the recommended velocity of flow is 0.2 m/sec and detention period is 2 minutes, the length of the tank, is__________________?
  1.    16 m
  2.    20 m
  3.    24 m
  4.    30 m
 Discuss Question
Answer: Option C. -> 24 m
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1539. Sewer pipes are designed for maximum discharge with 25% to 33% vacant cross-sectional area for__________________?
  1.    Unexpected large scale infiltration of stream water
  2.    Unexpected increase in the population
  3.    Under estimates of maximum and average flows
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1540. The sewer that unloads the sewage at the point of treatment is called_________________?
  1.    Main sewer
  2.    Outfall sewer
  3.    Branch sewer
  4.    House sewer
 Discuss Question
Answer: Option B. -> Outfall sewer
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

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