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MCQs

Total Questions : 183 | Page 16 of 19 pages
Question 151. Asbestos cement sewer offers resistant to sulfide corrosion.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option B. -> False
Answer: (b).False
Question 152. The diameter of plain cement concrete pipes used for sewerage system is __________
  1.    20mm
  2.    30mm
  3.    90mm
  4.    63mm
 Discuss Question
Answer: Option C. -> 90mm
Answer: (c).90mm
Question 153. The crown corrosion takes place due to formation of __________
  1.    CO₂
  2.    H₂O
  3.    H₂S
  4.    HCl
 Discuss Question
Answer: Option C. -> H₂S
Answer: (c).H₂S
Question 154. The grade of concrete used in plain cement concrete sewer is __________
  1.    M5
  2.    M10
  3.    M15
  4.    M20
 Discuss Question
Answer: Option D. -> M20
Answer: (d).M20
Question 155. Which of the following is incorrect regarding Cement concrete sewers?
  1.    They are economical
  2.    Can be manufactured at the site
  3.    They can be made of any desired strength
  4.    They cannot withstand tensile stress
 Discuss Question
Answer: Option D. -> They cannot withstand tensile stress
Answer: (d).They cannot withstand tensile stress
Question 156. The cement concrete sewers are lined with vitrified clay lining to prevent __________
  1.    Dampness of sewer
  2.    Algae growth in the sewer
  3.    Crown corrosion
  4.    Foul smell of sewer
 Discuss Question
Answer: Option C. -> Crown corrosion
Answer: (c).Crown corrosion
Question 157. Which of the following method is not used for treating crown corrosion?
  1.    Full runs of sewer
  2.    Increasing the sulfate content of sewage
  3.    Aeration and chlorination of sewage
  4.    Vitrified clay lining of sewer
 Discuss Question
Answer: Option B. -> Increasing the sulfate content of sewage
Answer: (b).Increasing the sulfate content of sewage
Question 158. Identify the correct statement from the following regarding Cast iron sewer.
  1.    They have low internal pressure
  2.    They are not leakage proof
  3.    They cannot withstand heavy external loads
  4.    They are preferred in water supply lines
 Discuss Question
Answer: Option D. -> They are preferred in water supply lines
Answer: (d).They are preferred in water supply lines
Question 159. The range of diameter of cast iron sewer is __________
  1.    20-100mm
  2.    150-750mm
  3.    40-250mm
  4.    100-250mm
 Discuss Question
Answer: Option B. -> 150-750mm
Answer: (b).150-750mm
Question 160. Which of the following is incorrect regarding Stoneware sewer?
  1.    They can withstand tensile stress
  2.    They are highly resistant to sulfide corrosion
  3.    They have smooth interior
  4.    They are high compressive strength
 Discuss Question
Answer: Option A. -> They can withstand tensile stress
Answer: (a).They can withstand tensile stress

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