WorksheetsDAY 70 WORKSHEET ITI PUBLIC HEALTHWater Quality and Testing Quiz
Total questions: 15
Worksheet time: 11mins
Turbidity measured using a Nephelometer works on which principle?
Light absorption
Light scattering
Chemical precipitation
Refraction of light
If total hardness is less than total alkalinity, then:
Carbonate hardness = Total alkalinity
Carbonate hardness = Total hardness
Non-carbonate hardness = Total hardness
Non-carbonate hardness = Total alkalinity
The acceptable limit of fluoride in drinking water as per IS 10500:2012 is:
0.5 mg/L
1 mg/L
1.5 mg/L
2 mg/L
High chloride content in water mainly indicates:
Fresh groundwater availability
Sewage/sea water contamination
Excess lime application
High oxygenation
Pathogens present in water are strongly associated with:
Turbidity only
Chemical impurities
Biological contamination
Hardness level
Temporary hardness can be removed completely by boiling.
True
False
Colour in water expressed as True Colour Unit (TCU) refers to colour after removing suspended matter.
True
False
Assertion (A): KMnO₄ can be used for disinfection in rural water supply. Reason (R): KMnO₄ provides residual protection similar to chlorine.
A true, R true and R explains A
A true, R true but R doesn't explain A
A true, R false
A false, R true
(a) test is used to estimate undesirable bacterial presence using Most Probable Number (MPN) concept.
The permissible total dissolved solids (TDS) level for drinking water is (a) mg/L (acceptable).
Threshold odour is measured in units called ___ using an instrument called ___.
(a)
The indicator used in chloride estimation using Mohr’s method is (a) .
The standard DO level required for survival of aquatic life is approximately (a) ppm.
Match the following: Physical Parameters & Measuring Devices.
A. Colour
Tintometer
B. Odour
Osmoscope
C. Turbidity
Thermometer
D. Conductivity
Ionic tester
Match the following: Water Quality Concepts.
A. pH 7
Neutral water
B. Temporary hardness
Removes by boiling
C. EDTA titration
Permanent hardness
D. Sulphate contamination
Laxative effect
