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GATE CE 2020 Environmental Engg. Quiz 1

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Question 1

Consider the following statements:

1) Excess of sodium metal in drinking water supply may cause cardiac and kidney problem.

2) Excess of copper metal in drinking water supply may affect respiratory organs of human body.

3) During water supply temperature should be maintained between 20-35°C otherwise chemical and biological parameters of water may get affected.

Which of the following statements are correct?

Question 2

Which of the following statement is wrong regarding permanent hardness?

Question 3

For a central congested city whose population is 1.5 lakh, the fire demand as per National Board of Underwriters will be ____MLD.

Question 4

Which of the following statement(s) is (are) CORRECT?
1. Underground waters are generally softer than the surface waters.
2. For drinking purpose, water with hardness below 75 ppm are generally tasteless, and hence, the prescribed hardness limit for public supplies range between 75 to 115 ppm.
3. One degree of hardness means the soap destroying power produced by 14.25 milligrams of calcium carbonate in one litre of water.

Question 5

Match List-I (Test) with List-II (Method/ Instrument) and select the correct answer using the codes given below the lists:

Question 6

For a sample of water with the ionic composition is shown in figure below. The carbonate and non-carbonate hardness concentrations (in mg/l as CaCO3), respectively are
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Oct 2ESE & GATE CE