Importance of Water Multiple Choice Questions and Answers 13 pdf eBooks Download

Learn importance of water MCQs, grade 7 online science test 13, sewage system multiple choice questions and answers. Sewage system revision test has science worksheets, helping answer key with choices as grit tank, metal screen, sludge tank and filter bed of multiple choice questions (MCQ) with sewage system quiz as in sewage treatment plants, large material is removed by for competitive exam prep, viva interview questions. Free science study guide to practice sewage system quiz to attempt multiple choice questions based test.

MCQs on Importance of Water Quiz pdf Download Worksheets 13

MCQ. In sewage treatment plants, large material is removed by

  1. metal screen
  2. grit tank
  3. sludge tank
  4. filter bed


MCQ. Desalination plants are used to convert

  1. hot water to cold water
  2. cold water to hot water
  3. tasteless water to salty water
  4. salty water to tasteless water


MCQ. Population which does not have tap water in their homes, is

  1. two-third of the world population
  2. one-third of the world population
  3. half of the world population
  4. quarter of the world population


MCQ. Water can be kept clean by detergents, if they are

  1. not poisonous
  2. odorless
  3. biodegradable
  4. non biodegradable


MCQ. 'Distillation' can also be used to treat

  1. fresh water
  2. sewage water
  3. polluted water
  4. rain water