Q.1
__________ plant emits large amount of SO₂ as an air pollutant.
Q.2
Higher concentration of nitrogen dioxide in atmospheric air causes
Q.3
Presence of nitrogen in high concentration in contaminated air reduces partial pressure of oxygen in lungs, thereby causing asphyxia (suffocation) leading to death from oxygen deficiency. Concentration of N₂ in contaminated air at which it acts as a natural asphyxant is ≥ __________ percent.
Q.4
Ozone is
Q.5
TLV of lead for public sewer/waste water is about __________ ppm.
Q.6
Radioactive substances present in the polluted water stream can be removed by
Q.7
The pH value of potable water should be between
Q.8
Dust collection efficiency of a cyclone separator depends upon its
Q.9
The concentration of water vapour in troposphere, which depends upon the altitude & temperature varies in the range of zero to __________ percent.
Q.10
The main industrial source of emission of hydrogen sulphide air pollutant is
Q.11
In water chemical treatment plant, use of chloramines ensures
Q.12
Hydrogen ion concentration in distilled water is
Q.13
The destruction of water-borne pathogens is termed as disinfection of water. Which of the following is a water disinfectant?
Q.14
Which of the following is not an air pollutant?
Q.15
Which of the following is not a natural source of air pollution?
Q.16
Which of the following gases is having the widest explosion limit (about 2 to 81% gas in gas-air mixture), rendering it the property of the most explosive gas?
Q.17
The detrimental effect on organism and water quality with temperature rise of aquatic system is the reduction of __________ of water.
Q.18
The resistance of water to the passage of light through it is a measure of the
Q.19
Which of the following is the most efficient for removal of very finely divided suspended solids and colloidal matter from the polluted water stream?
Q.20
A masonry structure built below ground level, where biochemical reaction takes place due to anaerobic bacteria is called
Q.21
Presence of excess flourine in water causes
Q.22
The effect of increase in carbon dioxide level of the atmosphere and its profound effect on our climate is called the
Q.23
Maximum permissible turbidity in potable water is __________ ppm.
Q.24
Which of the following is the most detrimental for water used in high pressure boiler?
Q.25
A gas is termed as non-toxic, if its maximum permissible concentration (TLV) ranges from __________ ppm.
Q.26
Aerodynamic noise resulting from turbulent gas flow is the most prevalent source of valve noise in fluid ilow control. It is caused due to
Q.27
The pH value of oxidised sewage is about
Q.28
Industrial workers working in leather tanning & manufacturing units are prone to suffer from
Q.29
Moist atmospheric air at high temperature (e.g., in summer) having high concentration of sulphur dioxide causes
Q.30
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?
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