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MCQs

Total Questions : 1556 | Page 10 of 156 pages
Question 91. Which of the following pumps in used to pump sewage solids with liquid sewage without clogging the pump is?
  1.    Centrifugal pump
  2.    Pneumatic ejector
  3.    Reciprocating pump
  4.    None of these
 Discuss Question
Answer: Option A. -> Centrifugal pump
Question 92. The width of a rectangular sewer is twice its depth while discharging 1.5 m/sec. The width of the sewer is
  1.    0.68 m
  2.    0.88 m
  3.    1.36 m
  4.    1.76 m
 Discuss Question
Answer: Option C. -> 1.36 m
Question 93. 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
Question 94. If is the diameter of upper circular portion, the overall depth of a standard egg shaped section, is
  1.    1.15 D
  2.    1.25 D
  3.    1.5 D
  4.    1.75 D
 Discuss Question
Answer: Option C. -> 1.5 D
Question 95. For a peak discharge of 0.0157 cumec, with a velocity of 0.9 m/sec, the diameter of the sewer main, is
  1.    10 cm
  2.    12 cm
  3.    15 cm
  4.    18 cm
 Discuss Question
Answer: Option C. -> 15 cm
Question 96. For providing an Indian type W.C., the R.C.C. slabs in the toilet portion
  1.    Should be sunk by 20 cm
  2.    Should be kept 20 cm above the adjacent portion
  3.    Should be sunk by 50 cm
  4.    Need not be sunk
 Discuss Question
Answer: Option C. -> Should be sunk by 50 cm
Question 97. In Chezy’s formula V = C rs for calculating the velocity of flow in circular sewer of diameter running full, the value of hydraulic mean radius is
  1.    D/1
  2.    D/2
  3.    D/3
  4.    D/4
 Discuss Question
Answer: Option D. -> D/4
Question 98. Hydraulic mean radius is
  1.    Mean radius of sewer
  2.    Difference in heads between two points in circular pipes
  3.    Mean of radii in a pipe line of varying cross -sections
  4.    Cross-sectional area/wetted perimeter
 Discuss Question
Answer: Option D. -> Cross-sectional area/wetted perimeter
Question 99. Hazen’s formula VS = 418 (GS – Gw)d [(3T + 70)/100] is used for the settlement velocity of the particles of diameter
  1.    Less than 0.01 mm
  2.    Less than 0.05 mm
  3.    Less than 0.1 mm
  4.    Greater than 0.1 mm
 Discuss Question
Answer: Option D. -> Greater than 0.1 mm
Question 100. The sewer which resists sulphide corrosion, is
  1.    Brick sewer
  2.    Cast iron sewer
  3.    R.C. sewer
  4.    Lead sewer
 Discuss Question
Answer: Option D. -> Lead sewer

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