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MCQs

Total Questions : 828 | Page 1 of 83 pages
Question 1. If Biochemical oxygen demand (BOD) of a town is 20000 kg/day and BOD per capita per day is 0.05 kg, then population equivalent of town is
  1.    1000
  2.    4000
  3.    1,00,000
  4.    4,00,000
 Discuss Question
Answer: Option D. -> 4,00,000
Question 2. The specific gravity of sewage is
  1.    Much greater than 1
  2.    Slightly less than 1
  3.    Equal to 1
  4.    Slightly greater than 1
 Discuss Question
Answer: Option D. -> Slightly greater than 1
Question 3. The effective size of sand particles used in slow sand filters is
  1.    0.25 to 0.35 mm
  2.    0.35 to 0.60 mm
  3.    0.60 to 1.00 mm
  4.    1.00 to 1.80 mm
 Discuss Question
Answer: Option A. -> 0.25 to 0.35 mm
Question 4. Chlorine demand of water is equal to
  1.    Applied chlorine
  2.    Residual chlorine
  3.    Sum of applied and residual chlorine
  4.    Difference of applied and residual chlorine
 Discuss Question
Answer: Option D. -> Difference of applied and residual chlorine
Question 5. Corrosion in concrete sewers is caused by
  1.    Septic conditions
  2.    Dissolved oxygen
  3.    Chlorine
  4.    Nitrogen
 Discuss Question
Answer: Option A. -> Septic conditions
Question 6. The commonly used material for water supply pipes, which has the properties of being strong, not easily corroded and long life but is heavy and brittle, is
  1.    Steel
  2.    Cast iron
  3.    Copper
  4.    Reinforced cement concrete
 Discuss Question
Answer: Option B. -> Cast iron
Question 7. The suitable layout of a distribution system for irregularly growing town is
  1.    Dead end system
  2.    Grid iron system
  3.    Radial system
  4.    Ring system
 Discuss Question
Answer: Option A. -> Dead end system
Question 8. Assertion A: The consumption of water increases with increase in the distribution pressure.Reason R: Higher distribution pressure causes more loss and waste of waterSelect your answer according to the coding system given below
  1.    Both A and R is true and R is the correct explanation of A
  2.    Both A and R is true but R is not the correct explanation of A
  3.    A is true but R is false
  4.    A is false but R is true
 Discuss Question
Answer: Option A. -> Both A and R is true and R is the correct explanation of A
Question 9. Which of the following values of pH represents a stronger acid?
  1.    2
  2.    5
  3.    7
  4.    10
 Discuss Question
Answer: Option A. -> 2
Question 10. The distribution mains are designed for
  1.    Maximum daily demand
  2.    Maximum hourly demand
  3.    Average daily demand
  4.    Maximum hourly demand on maximum day
 Discuss Question
Answer: Option D. -> Maximum hourly demand on maximum day

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