Environmental System Analysis [NTA-NET (UGC-NET) Environmental Science (89)]: Questions 1 - 3 of 23
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Question 1
Appeared in Year: 2018
Question MCQ▾
In a city of area () , the vehicular traffic is releasing g/ of CO during the winter season between 4 pm and 8 pm. During this period mixing height is 100 m. The wind is blowing in the city at a speed of 4.0 m/s along the side of the city. If the initial concentration of CO at 4 pm was negligible, the estimated concentration of CO after 4 hours should be: (July)
Choices
Choice (4) | Response | |
---|---|---|
a. | mg/ | |
b. | mg/ | |
c. | mg/ | |
d. | mg/ |
Question 2
Appeared in Year: 2016
Question MCQ▾
The Box model for an airshed over a city has the following parameter values: (September)
If the initial concentration of a pollutant over the city is zero, estimate the time in which
the concentration of the pollutant in the airshed reaches ~63% of its final value.
Choices
Choice (4) | Response | |
---|---|---|
a. | 1 hr. 20 minutes | |
b. | 1 hr. 40 minutes | |
c. | 2 hrs. 30 minutes | |
d. | 1 hr. 10 minutes |
Question 3
Appeared in Year: 2017
Question Assertion-Reason▾
Assertion(Ꭺ)
The pollutants have the same density as the air surrounding them.
Reason(Ꭱ)
The atmosphere is stable.
Choices
Choice (4) | Response | |
---|---|---|
a. | Both Ꭺ and Ꭱ are false | |
b. | Ꭺ is false but Ꭱ is true | |
c. | Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ | |
d. | Ꭺ is true but Ꭱ is false |