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MCQs

Total Questions : 62 | Page 4 of 7 pages
Question 31. Process in which water is filtered through sand and gravel is called
  1.    sedimentation
  2.    coagulation
  3.    filtration
  4.    chlorination
 Discuss Question
Answer: Option C. -> filtration
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 32. Natural water is
  1.    pure
  2.    impure
  3.    non distilled
  4.    distilled
 Discuss Question
Answer: Option B. -> impure
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 33. Addition of washing soda removes
  1.    softness of water
  2.    temporary hardness of water
  3.    permanent hardness of water
  4.    hydrogen from water
 Discuss Question
Answer: Option C. -> permanent hardness of water
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 34. How many basic steps are involved in raw water treatment?
  1.    three
  2.    four
  3.    five
  4.    six
 Discuss Question
Answer: Option B. -> four
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 35. Water that easily gives lather with soap is called
  1.    hard water
  2.    soft water
  3.    dirty water
  4.    clean water
 Discuss Question
Answer: Option A. -> hard water
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 36. During thunderstorms, water dissolves
  1.    dust particles
  2.    HCl
  3.    nitric acid
  4.    clouds
 Discuss Question
Answer: Option C. -> nitric acid
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 37. The first 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 A. -> primary sewage treatment
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 38. Temporary hardness can be removed by adding
  1.    lime
  2.    carbon
  3.    oxygen
  4.    slaked lime
 Discuss Question
Answer: Option D. -> slaked lime
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 39. Hepatitis is caused by
  1.    virus
  2.    bacteria
  3.    amoeba
  4.    parasite
 Discuss Question
Answer: Option A. -> virus
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 40. Water which forms scum with soap is called
  1.    hard water
  2.    soft water
  3.    distilled water
  4.    non distilled water
 Discuss Question
Answer: Option A. -> hard water
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

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