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MCQs

Total Questions : 183 | Page 8 of 19 pages
Question 71. What should be the diameter of the sewer when the self cleansing velocity is 60cm/Sec?
  1.    10cm
  2.    20cm
  3.    >60cm
  4.    100cm
 Discuss Question
Answer: Option C. -> >60cm
Answer: (c).>60cm
Question 72. The non scouring velocity is 260cm/Sec. The type of material of the sewer is __________
  1.    Earth channels
  2.    Stone ware sewers
  3.    Brick lined sewer
  4.    Cement concrete sewer
 Discuss Question
Answer: Option D. -> Cement concrete sewer
Answer: (d).Cement concrete sewer
Question 73. The maximum velocity at which no abrasion takes place is called _______
  1.    Settling velocity
  2.    Self cleansing velocity
  3.    Mean velocity
  4.    Non Scouring velocity
 Discuss Question
Answer: Option D. -> Non Scouring velocity
Answer: (d).Non Scouring velocity
Question 74. The non scouring velocity required for cast iron sewer pipes is __________
  1.    50cm/Sec
  2.    350cm/Sec
  3.    160cm/Sec
  4.    220cm/Sec
 Discuss Question
Answer: Option B. -> 350cm/Sec
Answer: (b).350cm/Sec
Question 75. Which of the following is incorrect regarding circular sewer?
  1.    It is easily manufactured
  2.    It offers more opportunities for deposits
  3.    It is the most economical section
  4.    It has uniform curvature
 Discuss Question
Answer: Option B. -> It offers more opportunities for deposits
Answer: (b).It offers more opportunities for deposits
Question 76. A circular section of sewer gives _______ area for a given perimeter.
  1.    Small
  2.    Large
  3.    Minimum
  4.    Maximum
 Discuss Question
Answer: Option D. -> Maximum
Answer: (d).Maximum
Question 77. The hydraulic mean depth of a circular section running full is __________
  1.    D
  2.    D/2
  3.    D²
  4.    D/4
 Discuss Question
Answer: Option D. -> D/4
Answer: (d).D/4
Question 78. What is the wetted perimeter of a circular section of sewer?
  1.    (22/7) *D²
  2.    (22/7) *D
  3.    (22/7) *D³
  4.    (22/7)² *D
 Discuss Question
Answer: Option B. -> (22/7) *D
Answer: (b).(22/7) *D
Question 79. The proportional perimeter of a circular sewer running partially half where K is the central angle subtended at a circular section of sewer is __________
  1.    K/360°
  2.    K/90°
  3.    K/270°
  4.    K/180°
 Discuss Question
Answer: Option A. -> K/360°
Answer: (a).K/360°
Question 80. The proportional depth of a circular sewer running partially half is __________
  1.    (1-cosK/2)
  2.    (1/2) * (1-sinK/2)
  3.    (1/2) * (1-cosK/2)
  4.    (1-cosK/2)²
 Discuss Question
Answer: Option C. -> (1/2) * (1-cosK/2)
Answer: (c).(1/2) * (1-cosK/2)

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