Environmental Science and Engineering
2022 · Paper 1
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Complete GATE ES 2022 Paper 1 overview, original pages and practice · Timed previous-paper practice
Questions 64–65 of 65. Imported answers require review unless explicitly marked reviewed.
Question 64
Open questionESNAT2 marksNeeds review
A ground level source emits 1000 g per day of SO
. In vicinity of the source, ambient temperature is measured at 10 m and 110 m as 25°C and 24.5°C, respectively. The mean wind speed is found to be 2 m per second. The dispersion coefficients at 1000 m downwind distance from the source are given in table below: | Dispersion coefficients (in m) | | |
|---|---|---|---|
| Stable | Neutral | Unstable |
Crosswind direction | 50.5 | 80.0 | 156.0 |
Vertical direction | 21.4 | 41.5 | 110.2 |
Estimated ground level concentration (in μg/m
, rounded off to two decimal places) of SO
at a downwind distance of 1000 m (at the plume centerline) from the source is __________.Log in to check the answer
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Open questionESNAT2 marksNeeds review
Figure below gives the heat inflow into the furnace of a waste-to-energy plant along with the heat outflows from the furnace.
Assume: (i) total heat loss equal to 3% of heat released while burning waste, (ii) sensible heat of the waste is negligible, (iii) complete burning of the waste is ensured. If the waste feed rate into this plant is 70 kg/h, the heat content of the waste (in kcal/kg, rounded off to one decimal place) is __________.
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