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MCQs

Total Questions : 180 | Page 7 of 18 pages
Question 61. The angle of repose is zero for ______________
  1.    Water
  2.    Masonry
  3.    Soil
  4.    Cement
 Discuss Question
Answer: Option A. -> Water
Answer: (a).Water
Question 62. The process of forming thick gelatinous precipitates is known as ___________
  1.    Sedimentation
  2.    Flocculation
  3.    Coagulation
  4.    Filtration
 Discuss Question
Answer: Option B. -> Flocculation
Answer: (b).Flocculation
Question 63. Biological Oxygen Demand (BOD) of safe drinking water must be ________
  1.    10
  2.    15
  3.    5
  4.    0
 Discuss Question
Answer: Option D. -> 0
Answer: (d).0
Question 64. The most common coagulant is _____________
  1.    Magnesium sulphate
  2.    Alum
  3.    Chlorine
  4.    Salt
 Discuss Question
Answer: Option B. -> Alum
Answer: (b).Alum
Question 65. What is the desirable limit of calcium in drinking water?
  1.    45 mg/l
  2.    60 mg/l
  3.    75 mg/l
  4.    90 mg/l
 Discuss Question
Answer: Option C. -> 75 mg/l
Answer: (c).75 mg/l
Question 66. Oxidation is done in __________ method.
  1.    Sedimentation
  2.    Filtration
  3.    Coagulation
  4.    Aeration
 Discuss Question
Answer: Option D. -> Aeration
Answer: (d).Aeration
Question 67. Which of the following is not a method of chlorination?
  1.    As bleaching powder
  2.    As free chlorine gas
  3.    As chloramines
  4.    Use of chloramines
 Discuss Question
Answer: Option D. -> Use of chloramines
Answer: (d).Use of chloramines
Question 68. Bulk modulus is denoted by __________
  1.    A
  2.    E
  3.    K
  4.    V
 Discuss Question
Answer: Option C. -> K
Answer: (c).K
Question 69. Which of the following is a method of aeration?
  1.    Mechanical straining
  2.    Cascades
  3.    Biological metabolism
  4.    Electrolytic changes
 Discuss Question
Answer: Option B. -> Cascades
Answer: (b).Cascades
Question 70. The stress corresponding to 0.2% of strain in the stress-strain curve is _________
  1.    Proof stress
  2.    Working stress
  3.    Direct stress
  4.    Tenacity
 Discuss Question
Answer: Option A. -> Proof stress
Answer: (a).Proof stress

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