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Q: Measure of the degree at which water losses its transparency due to the presence of suspended particulates is termed as:
  • A. coagulation
  • B. turbidity
  • C. flocculation
  • D. sedimentation
Correct Answer: Option B - Measure of the degree at which water losses its transparency due to the presence of suspended particulates is termed as turbidity. • It is not direct quantitative measure of suspended solids. • The measurement of turbidity is done using the following. (i) Turbidity rod–It is a field method. (ii) Jackson's turbidity meter–It is laboratory method. (iii) Baylis/Nephlometer– It is based on colour matching techniques and mostly used for domestic water supply. • Acceptable limit is 1 NTU and cause for rejection is 5 NTU (IS : 10500 - 2012).
B. Measure of the degree at which water losses its transparency due to the presence of suspended particulates is termed as turbidity. • It is not direct quantitative measure of suspended solids. • The measurement of turbidity is done using the following. (i) Turbidity rod–It is a field method. (ii) Jackson's turbidity meter–It is laboratory method. (iii) Baylis/Nephlometer– It is based on colour matching techniques and mostly used for domestic water supply. • Acceptable limit is 1 NTU and cause for rejection is 5 NTU (IS : 10500 - 2012).

Explanations:

Measure of the degree at which water losses its transparency due to the presence of suspended particulates is termed as turbidity. • It is not direct quantitative measure of suspended solids. • The measurement of turbidity is done using the following. (i) Turbidity rod–It is a field method. (ii) Jackson's turbidity meter–It is laboratory method. (iii) Baylis/Nephlometer– It is based on colour matching techniques and mostly used for domestic water supply. • Acceptable limit is 1 NTU and cause for rejection is 5 NTU (IS : 10500 - 2012).