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GATE CE 2022: ENVIRONMENT ENGINEERING :QUIZ 74
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Question 1
As per Mr. Goodrich formula, what is the ratio of the daily peak demand fo water and the monthly peak demand computed for a period of 12 days.
Question 2
The maximum BOD (in mg/l) present in a solution of glucose of concentration 330 mg/l.
Question 3
A sewer was laid at a gradient of 1 in 8765 is designed to flow half full. If the diameter of the sewer is 250 mm, calculate the velocity of flow in the sewer. Take manning’s coefficient to be 0.015
Question 4
A trickling filter has the following features:
Recirculation ratio=1.5
(B.O.D.)5 of raw sewage=250 mg/l
(B.O.D.) removal in primary settling tank = 40%
Sewage flow = 4.5 MLD, Volume of Trickling filter = 0.2 ha-m
The efficiency of the Trickling filter(using NRC formula) is
Question 5
The population of a city is 20000 with an average water demand of 150 lpcd. Calculate the area required (m2) of rapid sand filter system for the treatment of water. Daily 4% of filtered water is required for backwashing and it is being done for a duration of 30 minute. Given the Rate of filtration is 6000 Litre/hr/m2.
Question 6
8 kg of bleaching powder is required per day for disinfecting 5 million litres per day. The dose of chlorine has to be 0.4 ppm. The available chlorine in bleaching powder is _______%.
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Jul 19ESE & GATE CE
