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MCQs

Total Questions : 62 | Page 5 of 7 pages
Question 41. The third step of sewage water treatment is called
  1.    primary sewage treatment
  2.    secondary sewage treatment
  3.    activated sludge treatment
  4.    chlorination
 Discuss Question
Answer: Option C. -> activated sludge treatment
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 42. Water that gives little lather is called
  1.    hard water
  2.    soft water
  3.    dirty water
  4.    clean water
 Discuss Question
Answer: Option B. -> soft water
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 43. Water exists in how many different states on Earth?
  1.    one
  2.    two
  3.    three
  4.    four
 Discuss Question
Answer: Option C. -> three
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 44. What percentage of sodium chloride is present in seawater?
  1.    0.02
  2.    0.1
  3.    0.034
  4.    0.01
 Discuss Question
Answer: Option C. -> 0.034
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 45. The hardness which can be removed by boiling is called
  1.    permanent hardness
  2.    temporary hardness
  3.    stiffness
  4.    toughness
 Discuss Question
Answer: Option B. -> temporary hardness
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 46. What is the percentage of water from oceans?
  1.    0
  2.    0.002
  3.    0.006
  4.    0.97
 Discuss Question
Answer: Option D. -> 0.97
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 47. What is given when electricity is passed through acidified water in a voltammeter?
  1.    oxygen only
  2.    hydrogen only
  3.    nitrogen
  4.    oxygen and hydrogen
 Discuss Question
Answer: Option D. -> oxygen and hydrogen
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 48. Which of the following is transmitted by fecal contamination of water or food by an encysted organism?
  1.    cholera
  2.    dysentery
  3.    jaundice
  4.    hepatitis
 Discuss Question
Answer: Option B. -> dysentery
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 49. Which of the following is an intestinal disease caused by a parasite, entamoeba?
  1.    cholera
  2.    dysentery
  3.    jaundice
  4.    hepatitis
 Discuss Question
Answer: Option B. -> dysentery
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 50. Step of sewage water treatment in which effluent from a sewage plant is treated with chlorine is called
  1.    primary sewage treatment
  2.    secondary sewage treatment
  3.    activated sludge treatment
  4.    chlorination
 Discuss Question
Answer: Option D. -> chlorination
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

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