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Which one of the following related to domestic potable water quality is CORRECT?
  • a)
    Turbidity (on Silica scale) is 15-20 ppm
  • b)
    Colour (on Cobalt scale) is 15-25 ppm
  • c)
    Hardness (expressed as CaCO3 equivalent) is 75-115 ppm
  • d)
    BOD is 20 ppm
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
Which one of the following related to domestic potable water quality i...
Portable water quality parameter

(c) Hardness ϵ (75 to 115) ppm
(d) BOD = 0 ppm
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Which one of the following related to domestic potable water quality i...
Domestic potable water quality

Hardness of water is expressed in terms of CaCO3 equivalent. It is the sum of the concentrations of calcium and magnesium ions in water.

Explanation:

a) Turbidity (on Silica scale) is 15-20 ppm: Turbidity is the measure of the cloudiness or haziness of water. It is measured in nephelometric turbidity units (NTU), not in ppm. The silica scale is not used to measure turbidity.

b) Colour (on Cobalt scale) is 15-25 ppm: Colour is the measure of the tint or hue of water. It is measured in Hazen units (HU), not in ppm. The cobalt scale is not used to measure colour.

c) Hardness (expressed as CaCO3 equivalent) is 75-115 ppm: Hardness is the measure of the concentration of calcium and magnesium ions in water. It is expressed in ppm or mg/L of CaCO3 equivalent.

d) BOD is 20 ppm: BOD (Biochemical Oxygen Demand) is the amount of oxygen consumed by microorganisms in water to decompose organic matter. It is measured in mg/L, not in ppm.

Conclusion:

Therefore, the correct answer is option C, which states that the hardness of domestic potable water quality is expressed as CaCO3 equivalent and is in the range of 75-115 ppm.
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Which one of the following related to domestic potable water quality i...
C
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Which one of the following related to domestic potable water quality is CORRECT?a)Turbidity (on Silica scale) is 15-20 ppmb)Colour (on Cobalt scale) is 15-25 ppmc)Hardness (expressed as CaCO3equivalent) is 75-115 ppmd)BOD is 20 ppmCorrect answer is option 'C'. Can you explain this answer?
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Which one of the following related to domestic potable water quality is CORRECT?a)Turbidity (on Silica scale) is 15-20 ppmb)Colour (on Cobalt scale) is 15-25 ppmc)Hardness (expressed as CaCO3equivalent) is 75-115 ppmd)BOD is 20 ppmCorrect answer is option 'C'. Can you explain this answer? for Civil Engineering (CE) 2024 is part of Civil Engineering (CE) preparation. The Question and answers have been prepared according to the Civil Engineering (CE) exam syllabus. Information about Which one of the following related to domestic potable water quality is CORRECT?a)Turbidity (on Silica scale) is 15-20 ppmb)Colour (on Cobalt scale) is 15-25 ppmc)Hardness (expressed as CaCO3equivalent) is 75-115 ppmd)BOD is 20 ppmCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for Civil Engineering (CE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which one of the following related to domestic potable water quality is CORRECT?a)Turbidity (on Silica scale) is 15-20 ppmb)Colour (on Cobalt scale) is 15-25 ppmc)Hardness (expressed as CaCO3equivalent) is 75-115 ppmd)BOD is 20 ppmCorrect answer is option 'C'. Can you explain this answer?.
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