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Noise pollution level in a chemical plant is expressed in __________________?
Related MCQs
Smog is __________?
Threshold limit value (TLV) i.e., the maximum permissible safe limit of phosgene gas which Hitler used to use to kill his enemies in ‘gas chamber’ is about __________ ppm?
For existence of aquatic life in water, the dissolved oxygen content in it, should not be less than __________ ppm?
Very small amount of air pollutants are present in stratosphere also; though most of the atmospheric pollutants are present in the troposphere. Which of the following atmospheric pollutants does not cause the ozone layer depletion in atmosphere at tremendous rate ?
The term Biological Oxygen Demand (BOD) is used in relation to __________?
The upper layer of atmosphere is called the __________?
CFC (chloro fluoro carbon) is very highly reactive in causing depletion of ozone layer in the atmosphere. Each atom of chlorine liberated from CFC is capable of decomposing __________ molecules of ozone?
The average thickness of ozone layer in stratosphere is about __________ dobson unit (DU)?
Noise level audible to audience sitting in the 5th row from the stage during a large orchestra show corresponds to about __________ decibels?
Disinfection of water is done to remove __________?
In water treatment plant, zeolite process is used to remove the __________ of water?
On prolonged exposure to high concentration of carbon monoxide (> 5000 ppm), man dies because __________?
There are thirteen metals which are treated as pollutants. Which of the following metals is not a pollutant ?
Noise pollution level in a chemical plant is expressed in __________________?
A. Roentgen
B. Decibel
C. Hertz
D. None of these
Correct Answer:
Decibel
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Last Updated:
March 11, 2019