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GATE 2025 Environment Quiz 15
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Question 1
Consider following air pollutants
1. NO2
2. H2SO4
3. O3
4. Formaldehydes
Which of these pollutant(s) is/are secondary pollutant:
Question 2
Statement (I): If the environmental lapse rate (ELR) is greater than the dry adiabatic lapse rate (DALR), then the atmosphere is unstable.
Statement (II): Stable is the atmosphere, dispersion of pollutants is enhanced.
Question 3
A sample of air analyzed at 0ºC and 1 atm pressure is reported to contain 9 PPM of CO. Determine the equivalent CO concentration in milligrams per cubic metre
Question 4
Assertion (A): wet scrubber does not remove the gaseous stream.
Reason (R): In the wet scrubber, water droplets come into contact with the particulates.
Question 5
What will be the amount of air supplied, if 4 kg of oxygen is required per kg of volatile solid destroyed, which is 30% of total volatile sited present? The air supplied has density of 1.25 kg/m3, oxygen content in air is 25% and total volatile solid present is 1200 kg/day. Assume efficiency of transferring O2 is 20%.
Question 6
At an elevation of 22 m and 642 m from the ground surface, the temperature is 23.75°C and 16.25°C respectively.
The lapse rate can be referred as:
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Nov 20ESE & GATE CE
