Test: Air & Sound Pollution - 2


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10 Questions MCQ Test Topicwise Question Bank for Civil Engineering | Test: Air & Sound Pollution - 2

Test: Air & Sound Pollution - 2 for Chemical Engineering 2022 is part of Topicwise Question Bank for Civil Engineering preparation. The Test: Air & Sound Pollution - 2 questions and answers have been prepared according to the Chemical Engineering exam syllabus.The Test: Air & Sound Pollution - 2 MCQs are made for Chemical Engineering 2022 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Air & Sound Pollution - 2 below.
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Test: Air & Sound Pollution - 2 - Question 1

Which one of the following pollutants or pairs of pollutants is formed due to photochemical reactions?

Detailed Solution for Test: Air & Sound Pollution - 2 - Question 1

Photochemical reactions form O3, PAN, formaldehyde, etc.

Test: Air & Sound Pollution - 2 - Question 2

Which of the following pairs are correctly matched?

Select the correct answer using the codes given below:

Detailed Solution for Test: Air & Sound Pollution - 2 - Question 2

Reverberation time is the time required to reduce the intensity to one-millionth of its initial value.
Sound level (dB) 

TTS (Temporary Threshold Shift) is temporary impairment of hearing acuity as indicated by change in the threshold of audibility PTS (Permanent Threshold Shift) is related to permanent hearing loss. The sound foci are formed when sound waves are reflected from concave surface.

Test: Air & Sound Pollution - 2 - Question 3

The following is a well known formula for estimating the plume rise:


where the letters have their usual meaning.
The estimated plume rise (by the above formula) with a stack gas having heat emission rate 2000 kJ/s, the wind speed 4 m/s, stack gas speed 8 m/s inside a stack diameter of 1 m at the top is 

Detailed Solution for Test: Air & Sound Pollution - 2 - Question 3

Wind Speed u = 4 m/s
Stack gas speed Vs = 8 m/s
Diameter d = 1 m
Heat rise Qh = 2000 kJ/s
We know that effective height of stack,

Test: Air & Sound Pollution - 2 - Question 4

Which one of the following procedures is used for sampling of the flue gas in a chimney for SPM?

Test: Air & Sound Pollution - 2 - Question 5

Which one of the following units is employed for the removal of particulate matter above 50 μ in size?

Detailed Solution for Test: Air & Sound Pollution - 2 - Question 5

Test: Air & Sound Pollution - 2 - Question 6

Acoustics of an auditorium is considered to be excellent when its reverberation time is between

Detailed Solution for Test: Air & Sound Pollution - 2 - Question 6

For excellent acoustic conditions, reverberation time should be between 0.5 to 1.5 seconds.

Test: Air & Sound Pollution - 2 - Question 7

Which type of light energy is effectively absorbed by CO2 in the lower boundary of the troposphere?

Detailed Solution for Test: Air & Sound Pollution - 2 - Question 7

CO2 is major green house gas and absorbs long wave radiations like infrared radiation.

Test: Air & Sound Pollution - 2 - Question 8

Which one of the following is the correct sound intensity expression with usual notations?

Test: Air & Sound Pollution - 2 - Question 9

What type of noise can be abated by providing lining on walls and ceiling with sound absorbing materials?

Detailed Solution for Test: Air & Sound Pollution - 2 - Question 9

Sound absorbing materials reflect the noise and they are mostly used in theatres etc.

Test: Air & Sound Pollution - 2 - Question 10

Which is the major pollutant present in photochemical smog?

Detailed Solution for Test: Air & Sound Pollution - 2 - Question 10

Photochemically, the NOx and hydrocarbons are two groups of chemical compounds which are the necessary ingredients for the production of photochemical smog.

The end product of photochemical reactions is photo chemical smog consisting of air contaminants such as O3, PAN, aldehydes, ketones, alkyl nitrates and carbon monoxide.

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