Q.1
Which of the following is not a weightless pollutant?
Q.2
The major reason of hydrodynamic noise (i.e., noise resulting from liquid flow) is
Q.3
Pick out the wrong statement.
Q.4
Thermal pollution due to excessive heat & temperature in the working place causes
Q.5
Which of the following processes is involved in the biochemical treatment of sewage effluents?
Q.6
Which of the following fine dust removal equipments is the most efficient?
Q.7
When the concentration of SO₂ in air is greater than __________ ppm, it gives a pungent smell.
Q.8
Lagoons used for purification of polluted water
Q.9
Which is the best and the most effective method for the removal of organic contaminant present in the polluted water in very small quantity (say < 200 mg/litre)?
Q.10
Which of the following is the common pollutant emitted from metallurgical smelters, thermal power plant and cement plants?
Q.11
'Particulate' air pollutants are finely divided solids and liquids. Which of the following is not a 'particulate'?
Q.12
Thermal pollution of water increases its toxicity and oxidation of oxygen demanding waste besides favouring bacterial growth. A rise in water temperature by 10°C, doubles the toxic effects of __________ present in it.
Q.13
Removal of __________ results from the disinfection of water.
Q.14
Ionisation potential employed in the industrial electrostatic precipitator is of the order of
Q.15
The biological decomposition of organic substances in wastes controlled conditions is called
Q.16
Which of the following is not a secondary air pollutant?
Q.17
The density of the gases (present in air) decreases with increasing altitude to such an extent, that about 70% of the mass of atmospheric air is found in the lower 5 km. of the atmosphere. This lower region of atmosphere is called the
Q.18
Aerobic biological oxidation ponds used for the purification of polluted water
Q.19
Presence of __________ bacteria in water causes disease like typhoid.
Q.20
Brown spots in fabrics will be caused by washing with water containing large amount of .
Q.21
Algae growth in water is controlled by
Q.22
Automobile exhaust is passed through two compartments catalytic converter employing platinum as catalyst for
Q.23
Arsenic pollutant is not generated in____industries.
Q.24
Presence of bacteria in potable (drinking) water causes
Q.25
A 'body' which allows the short wavelength incoming solar radiation to enter in, but does not allow long wave length outgoing infra red radiation to escape out is called the
Q.26
Which of the following causes death by asphyxiation, if its presence in atmospheric air exceeds maximum allowable concentration (i.e. > 50 ppm)?
Q.27
Soluble silica present in boiler feed water can be removed by
Q.28
The most commonly used chemical coagulant in water treatment is
Q.29
Lagooning process is mainly a means of the
Q.30
Which of the following is the most major constituents of air pollutants?
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