Test: Quality Control of Water Supply - 1


10 Questions MCQ Test Environmental Engineering | Test: Quality Control of Water Supply - 1


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Attempt Test: Quality Control of Water Supply - 1 | 10 questions in 30 minutes | Mock test for Civil Engineering (CE) preparation | Free important questions MCQ to study Environmental Engineering for Civil Engineering (CE) Exam | Download free PDF with solutions
QUESTION: 1

The standard turbidity produced by one mg of silicon dioxide (silica) in one litre of distilled water, is called

Solution:
QUESTION: 2

Pick up the correct statement(s)

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QUESTION: 3

One True Colour Unit (TCU) is the colour produced by

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QUESTION: 4

The threshold odour number (TON) for a water sample of 40 ml, diluted to standard 200 ml mixture, in which odour is just barely detectable to the sense of smell, is

Solution:

Threshold odour number represents the dilution ratio at which the odour is hardly detectable,
TON  = 200/40 = 5

QUESTION: 5

Water is considered ‘hard’, if its hardness is of the order of

Solution:

Water with hardness upto 75 ppm are considered soft while those with 200 ppm and above are considered hard. In between the waters are considered as moderately hard.

QUESTION: 6

Higher quantities of copper, more than 2.5 mg/l or so, may cause diseases pertaining to

Solution:

High quantities of copper are likely to affect human lungs and other respiratory organs.

QUESTION: 7

The maximum allowable concentration of iron in water is

Solution:

Higher concentration of iron above 0.3 ppm causes discolouration of clothes and incrustation in water mains.

QUESTION: 8

The commonly used indicator for measuring iron concentration in water is

Solution:

Eriochrome black T is used to measure hardness. Phenolphthalein is used to measure alkalinity. Blue litmus is used to measure acidity of water.

QUESTION: 9

The maximum safe permissible limit of chlorides in domestic water supplies is

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QUESTION: 10

Breweries and distilleries preferably require

Solution:
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