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Read the statements given below:
(i) Values of the wind profile exponent for the 'very unstable' atmosphere is smaller than the wind profile exponent for the 'neutral' atmosphere.
(ii) Downwind concentration of air pollutants due to an elevated point source will be inversely proportional to the wind speed.
(iii) Value of the wind profile exponent for the 'neutral' atmosphere is smaller than the wind profile exponent for the 'very unstable' atmosphere.
(iv) Downwind concentration of air pollutants due to an elevated point source will be directly proportional to the wind speed.
Select the correct option.
- a)(iii) is False and (iv) is False.
- b)(i) is False and (iii) is True.
- c)(i) is True and (iv) is True.
- d)(ii) is False and (iii) is False.
Correct answer is option 'A'. Can you explain this answer?
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Most Upvoted Answer
Read the statements given below:(i) Values of the wind profile expone...
Understanding the Statements:
To understand why the correct answer is option A, let's analyze each statement one by one:
(i) Values of the wind profile exponent for the 'very unstable' atmosphere is smaller than the wind profile exponent for the 'neutral' atmosphere.
- The wind profile exponent refers to the rate at which wind speed changes with height. In a 'very unstable' atmosphere, the wind speed generally increases rapidly with height, resulting in a larger wind profile exponent. Therefore, this statement is false.
(ii) Downwind concentration of air pollutants due to an elevated point source will be inversely proportional to the wind speed.
- This statement implies that as the wind speed increases, the downwind concentration of air pollutants decreases. However, this is not true. The downwind concentration of pollutants is directly influenced by the wind speed, with higher wind speeds resulting in higher dispersion and dilution of pollutants. Therefore, this statement is false.
(iii) Value of the wind profile exponent for the 'neutral' atmosphere is smaller than the wind profile exponent for the 'very unstable' atmosphere.
- As mentioned earlier, in a 'very unstable' atmosphere, the wind speed increases rapidly with height, leading to a larger wind profile exponent. In a 'neutral' atmosphere, the wind speed typically increases more gradually with height, resulting in a smaller wind profile exponent. Therefore, this statement is true.
(iv) Downwind concentration of air pollutants due to an elevated point source will be directly proportional to the wind speed.
- This statement suggests that as the wind speed increases, the downwind concentration of air pollutants also increases. This is generally true because higher wind speeds enhance the dispersion and dilution of pollutants, resulting in lower concentrations. Therefore, this statement is false.
Explanation of the Correct Answer:
Based on the analysis of the statements, we can conclude that:
- Statement (i) is false because the wind profile exponent for a 'very unstable' atmosphere is larger than for a 'neutral' atmosphere.
- Statement (ii) is false because the downwind concentration of pollutants is directly proportional to the wind speed, not inversely proportional.
- Statement (iii) is true because the wind profile exponent is smaller for a 'neutral' atmosphere compared to a 'very unstable' atmosphere.
- Statement (iv) is false because the downwind concentration of pollutants is inversely proportional to the wind speed, not directly proportional.
Therefore, the correct answer is option A, which states that statement (iii) is false and statement (iv) is false.
To understand why the correct answer is option A, let's analyze each statement one by one:
(i) Values of the wind profile exponent for the 'very unstable' atmosphere is smaller than the wind profile exponent for the 'neutral' atmosphere.
- The wind profile exponent refers to the rate at which wind speed changes with height. In a 'very unstable' atmosphere, the wind speed generally increases rapidly with height, resulting in a larger wind profile exponent. Therefore, this statement is false.
(ii) Downwind concentration of air pollutants due to an elevated point source will be inversely proportional to the wind speed.
- This statement implies that as the wind speed increases, the downwind concentration of air pollutants decreases. However, this is not true. The downwind concentration of pollutants is directly influenced by the wind speed, with higher wind speeds resulting in higher dispersion and dilution of pollutants. Therefore, this statement is false.
(iii) Value of the wind profile exponent for the 'neutral' atmosphere is smaller than the wind profile exponent for the 'very unstable' atmosphere.
- As mentioned earlier, in a 'very unstable' atmosphere, the wind speed increases rapidly with height, leading to a larger wind profile exponent. In a 'neutral' atmosphere, the wind speed typically increases more gradually with height, resulting in a smaller wind profile exponent. Therefore, this statement is true.
(iv) Downwind concentration of air pollutants due to an elevated point source will be directly proportional to the wind speed.
- This statement suggests that as the wind speed increases, the downwind concentration of air pollutants also increases. This is generally true because higher wind speeds enhance the dispersion and dilution of pollutants, resulting in lower concentrations. Therefore, this statement is false.
Explanation of the Correct Answer:
Based on the analysis of the statements, we can conclude that:
- Statement (i) is false because the wind profile exponent for a 'very unstable' atmosphere is larger than for a 'neutral' atmosphere.
- Statement (ii) is false because the downwind concentration of pollutants is directly proportional to the wind speed, not inversely proportional.
- Statement (iii) is true because the wind profile exponent is smaller for a 'neutral' atmosphere compared to a 'very unstable' atmosphere.
- Statement (iv) is false because the downwind concentration of pollutants is inversely proportional to the wind speed, not directly proportional.
Therefore, the correct answer is option A, which states that statement (iii) is false and statement (iv) is false.
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Community Answer
Read the statements given below:(i) Values of the wind profile expone...
(a) For statement 4 and statement 2
According to Fick's law of diffusion,
It is assumed that the plume has a Gaussian distribution in both z (vertical) and y (horizontal) direction.
The concentration of a gas or aerosol (< 20)="" calculated="" at="" ground="" level="" for="" a="" distance="" downward="" x="" is="" given="" />
Where,
C is the concentration of pollutant,
U is mean wind speed,
σy is the standard deviation of horizontal plume concentration, in the crosswind direction,
σx is the standard deviation of horizontal plume concentration, in the vertical direction,
H is effective stack height (m),
X is the downward distance along the plume mean centerline from a point source (m),
Y is crosswind distance from the centerline of the plume (m),
From the relation, we can see that the downwind concentration of air pollutants due to an elevated point source is not directly proportional to the wind speed.
Whereas it is inversely proportional to concentration.
Statement 4 is false and statement 2 is true.
(b) Category
A – Extremely unstable
B – Moderately unstable
C – Slightly unstable
D – Neutral
E – Slightly stable
F – Moderately Stable
For neutral (D) velocity > For very unstable (A),
The value of the wind profile exponent for the 'very unstable' atmosphere is smaller than the wind profile exponent for the 'neutral' atmosphere
Statement 4 is false whereas statement 1 is true.
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Read the statements given below:(i) Values of the wind profile exponent for the 'very unstable' atmosphere is smaller than the wind profile exponent for the 'neutral' atmosphere.(ii) Downwind concentration of air pollutants due to an elevated point source will be inversely proportional to the wind speed.(iii) Value of the wind profile exponent for the 'neutral' atmosphere is smaller than the wind profile exponent for the 'very unstable' atmosphere.(iv) Downwind concentration of air pollutants due to an elevated point source will be directly proportional to the wind speed.Select the correct option.a)(iii) is False and (iv) is False.b)(i) is False and (iii) is True.c)(i) is True and (iv) is True.d)(ii) is False and (iii) is False.Correct answer is option 'A'. Can you explain this answer?
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Read the statements given below:(i) Values of the wind profile exponent for the 'very unstable' atmosphere is smaller than the wind profile exponent for the 'neutral' atmosphere.(ii) Downwind concentration of air pollutants due to an elevated point source will be inversely proportional to the wind speed.(iii) Value of the wind profile exponent for the 'neutral' atmosphere is smaller than the wind profile exponent for the 'very unstable' atmosphere.(iv) Downwind concentration of air pollutants due to an elevated point source will be directly proportional to the wind speed.Select the correct option.a)(iii) is False and (iv) is False.b)(i) is False and (iii) is True.c)(i) is True and (iv) is True.d)(ii) is False and (iii) is False.Correct answer is option 'A'. Can you explain this answer? for Civil Engineering (CE) 2024 is part of Civil Engineering (CE) preparation. The Question and answers have been prepared according to the Civil Engineering (CE) exam syllabus. Information about Read the statements given below:(i) Values of the wind profile exponent for the 'very unstable' atmosphere is smaller than the wind profile exponent for the 'neutral' atmosphere.(ii) Downwind concentration of air pollutants due to an elevated point source will be inversely proportional to the wind speed.(iii) Value of the wind profile exponent for the 'neutral' atmosphere is smaller than the wind profile exponent for the 'very unstable' atmosphere.(iv) Downwind concentration of air pollutants due to an elevated point source will be directly proportional to the wind speed.Select the correct option.a)(iii) is False and (iv) is False.b)(i) is False and (iii) is True.c)(i) is True and (iv) is True.d)(ii) is False and (iii) is False.Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for Civil Engineering (CE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Read the statements given below:(i) Values of the wind profile exponent for the 'very unstable' atmosphere is smaller than the wind profile exponent for the 'neutral' atmosphere.(ii) Downwind concentration of air pollutants due to an elevated point source will be inversely proportional to the wind speed.(iii) Value of the wind profile exponent for the 'neutral' atmosphere is smaller than the wind profile exponent for the 'very unstable' atmosphere.(iv) Downwind concentration of air pollutants due to an elevated point source will be directly proportional to the wind speed.Select the correct option.a)(iii) is False and (iv) is False.b)(i) is False and (iii) is True.c)(i) is True and (iv) is True.d)(ii) is False and (iii) is False.Correct answer is option 'A'. Can you explain this answer?.
Read the statements given below:(i) Values of the wind profile exponent for the 'very unstable' atmosphere is smaller than the wind profile exponent for the 'neutral' atmosphere.(ii) Downwind concentration of air pollutants due to an elevated point source will be inversely proportional to the wind speed.(iii) Value of the wind profile exponent for the 'neutral' atmosphere is smaller than the wind profile exponent for the 'very unstable' atmosphere.(iv) Downwind concentration of air pollutants due to an elevated point source will be directly proportional to the wind speed.Select the correct option.a)(iii) is False and (iv) is False.b)(i) is False and (iii) is True.c)(i) is True and (iv) is True.d)(ii) is False and (iii) is False.Correct answer is option 'A'. Can you explain this answer? for Civil Engineering (CE) 2024 is part of Civil Engineering (CE) preparation. The Question and answers have been prepared according to the Civil Engineering (CE) exam syllabus. Information about Read the statements given below:(i) Values of the wind profile exponent for the 'very unstable' atmosphere is smaller than the wind profile exponent for the 'neutral' atmosphere.(ii) Downwind concentration of air pollutants due to an elevated point source will be inversely proportional to the wind speed.(iii) Value of the wind profile exponent for the 'neutral' atmosphere is smaller than the wind profile exponent for the 'very unstable' atmosphere.(iv) Downwind concentration of air pollutants due to an elevated point source will be directly proportional to the wind speed.Select the correct option.a)(iii) is False and (iv) is False.b)(i) is False and (iii) is True.c)(i) is True and (iv) is True.d)(ii) is False and (iii) is False.Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for Civil Engineering (CE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Read the statements given below:(i) Values of the wind profile exponent for the 'very unstable' atmosphere is smaller than the wind profile exponent for the 'neutral' atmosphere.(ii) Downwind concentration of air pollutants due to an elevated point source will be inversely proportional to the wind speed.(iii) Value of the wind profile exponent for the 'neutral' atmosphere is smaller than the wind profile exponent for the 'very unstable' atmosphere.(iv) Downwind concentration of air pollutants due to an elevated point source will be directly proportional to the wind speed.Select the correct option.a)(iii) is False and (iv) is False.b)(i) is False and (iii) is True.c)(i) is True and (iv) is True.d)(ii) is False and (iii) is False.Correct answer is option 'A'. Can you explain this answer?.
Solutions for Read the statements given below:(i) Values of the wind profile exponent for the 'very unstable' atmosphere is smaller than the wind profile exponent for the 'neutral' atmosphere.(ii) Downwind concentration of air pollutants due to an elevated point source will be inversely proportional to the wind speed.(iii) Value of the wind profile exponent for the 'neutral' atmosphere is smaller than the wind profile exponent for the 'very unstable' atmosphere.(iv) Downwind concentration of air pollutants due to an elevated point source will be directly proportional to the wind speed.Select the correct option.a)(iii) is False and (iv) is False.b)(i) is False and (iii) is True.c)(i) is True and (iv) is True.d)(ii) is False and (iii) is False.Correct answer is option 'A'. Can you explain this answer? in English & in Hindi are available as part of our courses for Civil Engineering (CE).
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Here you can find the meaning of Read the statements given below:(i) Values of the wind profile exponent for the 'very unstable' atmosphere is smaller than the wind profile exponent for the 'neutral' atmosphere.(ii) Downwind concentration of air pollutants due to an elevated point source will be inversely proportional to the wind speed.(iii) Value of the wind profile exponent for the 'neutral' atmosphere is smaller than the wind profile exponent for the 'very unstable' atmosphere.(iv) Downwind concentration of air pollutants due to an elevated point source will be directly proportional to the wind speed.Select the correct option.a)(iii) is False and (iv) is False.b)(i) is False and (iii) is True.c)(i) is True and (iv) is True.d)(ii) is False and (iii) is False.Correct answer is option 'A'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
Read the statements given below:(i) Values of the wind profile exponent for the 'very unstable' atmosphere is smaller than the wind profile exponent for the 'neutral' atmosphere.(ii) Downwind concentration of air pollutants due to an elevated point source will be inversely proportional to the wind speed.(iii) Value of the wind profile exponent for the 'neutral' atmosphere is smaller than the wind profile exponent for the 'very unstable' atmosphere.(iv) Downwind concentration of air pollutants due to an elevated point source will be directly proportional to the wind speed.Select the correct option.a)(iii) is False and (iv) is False.b)(i) is False and (iii) is True.c)(i) is True and (iv) is True.d)(ii) is False and (iii) is False.Correct answer is option 'A'. Can you explain this answer?, a detailed solution for Read the statements given below:(i) Values of the wind profile exponent for the 'very unstable' atmosphere is smaller than the wind profile exponent for the 'neutral' atmosphere.(ii) Downwind concentration of air pollutants due to an elevated point source will be inversely proportional to the wind speed.(iii) Value of the wind profile exponent for the 'neutral' atmosphere is smaller than the wind profile exponent for the 'very unstable' atmosphere.(iv) Downwind concentration of air pollutants due to an elevated point source will be directly proportional to the wind speed.Select the correct option.a)(iii) is False and (iv) is False.b)(i) is False and (iii) is True.c)(i) is True and (iv) is True.d)(ii) is False and (iii) is False.Correct answer is option 'A'. Can you explain this answer? has been provided alongside types of Read the statements given below:(i) Values of the wind profile exponent for the 'very unstable' atmosphere is smaller than the wind profile exponent for the 'neutral' atmosphere.(ii) Downwind concentration of air pollutants due to an elevated point source will be inversely proportional to the wind speed.(iii) Value of the wind profile exponent for the 'neutral' atmosphere is smaller than the wind profile exponent for the 'very unstable' atmosphere.(iv) Downwind concentration of air pollutants due to an elevated point source will be directly proportional to the wind speed.Select the correct option.a)(iii) is False and (iv) is False.b)(i) is False and (iii) is True.c)(i) is True and (iv) is True.d)(ii) is False and (iii) is False.Correct answer is option 'A'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice Read the statements given below:(i) Values of the wind profile exponent for the 'very unstable' atmosphere is smaller than the wind profile exponent for the 'neutral' atmosphere.(ii) Downwind concentration of air pollutants due to an elevated point source will be inversely proportional to the wind speed.(iii) Value of the wind profile exponent for the 'neutral' atmosphere is smaller than the wind profile exponent for the 'very unstable' atmosphere.(iv) Downwind concentration of air pollutants due to an elevated point source will be directly proportional to the wind speed.Select the correct option.a)(iii) is False and (iv) is False.b)(i) is False and (iii) is True.c)(i) is True and (iv) is True.d)(ii) is False and (iii) is False.Correct answer is option 'A'. Can you explain this answer? tests, examples and also practice Civil Engineering (CE) tests.
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