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ENV ENGINEERING_APPSC CE Quiz-3

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Question 1

The efficiency of sedimentation tank is

Question 2

A grit chamber of dimension 15 m x 2 m x 0.8 m liquid depth flow of 800 m3/hr. Its detention time is

Question 3

What is the size of the coarse screen used in pretreatment of water?

Question 4

Which one of the following sequences is the most suitable for treating raw surface water to make it suitable for drinking purpose?

Question 5

The ozonation in drinking water helps to remove

Question 6

A town having a water demand of 20 MLD is to be supplied with water having a residual chlorine concentration of 0.3 ppm, If the chlorine demand in raw water is 0.6 ppm and the available chlorine in bleaching powder is 20 %, the amount of bleaching powder per day is

Question 7

Considering the process of coagulation, when the coagulants such as alum are used then

Question 8

The maximum daily demand of a city is 12 x 105 and the rate of filtration is 50 per litre per hour per m2. What is the area of the filter?

Question 9

Which of the following removes hardness completely

Question 10

Which of the following sequences is the most suitable for treating raw surface water to make it suitable for drinking purposes?
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