Ozone and iodine
Chlorine or its compounds
Ultraviolet light for irradiation of water
All of the above
✅ The correct answer is option D.
Enviornmental Engineering MCQs
Inhalation of silica dust causes a disease called
Bronchitis
Silicosis
Pneumoconiosis
None of these
✅ The correct answer is option B.
Removal of __________ is accomplished by aeration of water.
Dissolved gases
Suspended solids
Dissolved solids
None of these
✅ The correct answer is option A.
The lowest layer of atmosphere is known as the
Stratosphere
Troposphere
Ionosphere
None of these
✅ The correct answer is option B.
Carbon monoxide is a pollutant, which causes
Respiratory disease (e.g. asthma)
Asphyxiation (suffocation) leading to death
Retardation in crop growth
Damage to building materials like marble
✅ The correct answer is option B.
Lung cancer & DNA breakage are the major ill effects of excessive ozone exposure to human beings. Ozone layer depletion in the atmosphere is mainly caused by the presence of
CO₂
SO₂
Hydrocarbons
CFC (chloro fluoro carbon)
✅ The correct answer is option D.
Black smoke coming out of the chimney of a furnace is an indication of the use of __________ in the furnace.
Low amount of excess combustion air
Large quantity of excess combustion air
Hydrocarbon fuel
Pulverised coal as fuel
✅ The correct answer is option A.
A considerable part of the harmful ultraviolet radiation of the sum does not reach the earth surface, because of the fact that, there is a layer of __________ high above earth’s atmosphere, which absorbs it.
Hydrogen
Carbon dioxide
Ozone
None of these
✅ The correct answer is option C.
Most of the atmospheric air pollutants are present in large quantity in
Stratosphere
Thermosphere
Trophosphere
Mesosphere
✅ The correct answer is option C.
Most efficient and suitable dust removal equipment for removal of flyash from flue gas in a thermal power plant is the
Gravity settling chamber
Cyclone separator
Electrostatic precipitator
Bag filter
✅ The correct answer is option C.