Bar screens and grit chambers are used a. only in primary ...

[ts19998]

Bar screens and grit chambers are used
 
  a. only in primary wastewater treatment plants
  b. in most municipal wastewater treatment plants
  c. very rarely due to applications of modern technology
  d. only in advanced wastewater treatment plants
  e. in most municipal water supply facilities

Question 2

The BOD of wastewater is determined by
 
  a. evaporating the sample and weighing the residue
  b. filtering the sample and weighing the trapped solids
  c. heating the sample for 5 days and then measuring the DO
  d. measuring the DO consumed in a diluted sample after 5 days
  e. measuring the suspended solids after 5 days of settling

[qytan]

Answer to Question 1

b

Answer to Question 2

d

[ts19998]

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[qytan]

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