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MCQs

Total Questions : 181 | Page 13 of 19 pages
Question 121. What is the settling velocity of the particle if its diameter is 2 * 10⁻³cm. Given G=2.65, viscosity v=8 * 10⁻³cm²/Sec?
  1.    0.01cm/Sec
  2.    0.13cm/Sec
  3.    0.24cm/Sec
  4.    0.36cm/Sec
 Discuss Question
Answer: Option B. -> 0.13cm/Sec
Answer: (b).0.13cm/Sec
Question 122. The time period for which the water is stored in a sedimentation tank is called _____
  1.    Time of flow
  2.    Frequency of flow
  3.    Settling time
  4.    Detention period
 Discuss Question
Answer: Option D. -> Detention period
Answer: (d).Detention period
Question 123. In a rectangular horizontal flow tank, the maximum permissible velocity is ____ m/Sec.
  1.    3
  2.    0.3
  3.    0.03
  4.    0.003
 Discuss Question
Answer: Option B. -> 0.3
Answer: (b).0.3
Question 124. Settling velocity of a spherical body in a viscous fluid is given by ___________
  1.    Reynolds law
  2.    Newton’s law
  3.    Stokes law
  4.    Charles law
 Discuss Question
Answer: Option C. -> Stokes law
Answer: (c).Stokes law
Question 125. In a fill and draw type sedimentation tank, a detention period of ____ hours is provided.
  1.    6
  2.    12
  3.    18
  4.    24
 Discuss Question
Answer: Option D. -> 24
Answer: (d).24
Question 126. The detention period of a rectangular tank is given by _______
  1.    t0 = LBH/Q
  2.    t0 = LB/HQ
  3.    t0 = Q/LBH
  4.    t0 = HQ/LB
 Discuss Question
Answer: Option A. -> t0 = LBH/Q
Answer: (a).t0 = LBH/Q
Question 127. Which of the following represents the correct relation between displacement velocity and diameter of the particle?
  1.    v1 = (8Bg (G-1) d/f)^1/2
  2.    v1 = (8Bg (G-1) d2/f)²
  3.    v1 = (8Bg (G-1) d/f)
  4.    v1 = (8Bg (G-1) d/f)²
 Discuss Question
Answer: Option A. -> v1 = (8Bg (G-1) d/f)^1/2
Answer: (a).v1 = (8Bg (G-1) d/f)^1/2
Question 128. The quantity of water flowing per hour per unit horizontal area is called ________
  1.    Detention time
  2.    Flowing through period
  3.    Displacement time
  4.    Overflow rate
 Discuss Question
Answer: Option D. -> Overflow rate
Answer: (d).Overflow rate
Question 129. Range of Displacement efficiency in the plain sedimentation tank is ___________
  1.    0.25-0.5
  2.    0.1-0.2
  3.    0.5-0.8
  4.    0.3-0.6
 Discuss Question
Answer: Option A. -> 0.25-0.5
Answer: (a).0.25-0.5
Question 130. The average time required by water to pass through the settling tank is called _______
  1.    Detention time
  2.    Flowing through period
  3.    Time of flow
  4.    Mean time
 Discuss Question
Answer: Option B. -> Flowing through period
Answer: (b).Flowing through period

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