1
GATE CE 2022 Set 2
Numerical
+2
-0

A sewage treatment plant receives sewage at a flow rate of 5000 m3/day. The total suspended solids (TSS) concentration in the sewage at the inlet of primary clarifier is 200 mg/L. After the primary treatment, the TSS concentration in sewage is reduced by 60%. The sludge from the primary clarifier contains 2% solids concentration. Subsequently, the sludge is subjected to gravity thickening process to achieve a solids concentration of 6%. Assume that the density of sludge, before and after thickening, is 1000 kg/m3. The daily volume of the thickened sludge (in m3/day) will be _________. (round off to the nearest integer)

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2
GATE CE 2022 Set 2
MCQ (Single Correct Answer)
+1
-0.33

Match the following attributes of a city with the appropriate scale of measurements.

Attribute Scale of measurement
(P) Average temperature ($$^\circ $$C) of a city (I) Interval
(Q) Name of city (II) Oridnal
(R) Population density of a city (III) Nominal
(S) Ranking of a city based on ease of business (IV) Ratio

Which one of the following combinations is correct?

A
(P)-(II), (Q)-(I), (R)-(IV), (S)-(III)
B
(P)-(I), (Q)-(II), (R)-(III), (S)-(IV)
C
(P)-(I), (Q)-(III), (R)-(IV), (S)-(II)
D
(P)-(II), (Q)-(III), (R)-(IV), (S)-(I)
3
GATE CE 2022 Set 2
MCQ (Single Correct Answer)
+1
-0.33

To design an optimum municipal solid waste collection route, which of the following is/are NOT desired :

A
Waste collection on congested roads, should not occur during rush hours in morning or evening.
B
The last collection point on a route should be as close as possible to the waste disposal facility.
C
Collection should occur in the uphill direction.
D
Collection vehicle should not travel twice down the same street in a day.
4
GATE CE 2022 Set 2
Numerical
+2
-0

A sample of air analyzed at 25$$^\circ$$C and 1 atm pressure is reported to contain 0.04 ppm of SO2. Atomic mass of S = 32. O = 16. The equivalent SO2 concentration (in $$\mu$$g/m2) will be __________. (round off to the nearest integer)

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