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/

Edit

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

Edit

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

Edit