A. Grit

B. Aggregates

C. Smoke

A. Using the activities of bacteria and other micro organisms

B. Aerobic oxidation

D. Neither A. nor B.

A. Cancer

B. Asthma

C. Fluorosis (bone disease)

A. F

B. NOx

D. Hg

B. Hydrogen

C. None of these

D. Carbon dioxide

B. Path control of noise

C. Suppression of noise at the source itself

D. Protection of operating personnel

A. Foaming from boilers

C. Caustic embrittlement

D. Its silica content

A. Protein

B. Carbohydrates

C. Fats

A. 10-May

B. 2-Jan

D. 1500-2500

A. Dissolved gases

B. Color

C. Hardness

A. 1

B. 82

C. 19

A. Forest fire

B. Bacterial action in soil and swamp areas

D. All A., B. and C.

A. Automobile exhaust

C. Thickening of ozone layer

D. De-forestation

A. Forestation

B. Vegetation

C. Rain

B. Prevents solar heat being radiated out completely, resulting in heat trap i.e., global warming

C. Allows visible solar radiation (ultraviolet) of short wave-length to pass through

D. Reflects and absorbs the longer wavelength (infra-red) radiations

A. Poor quality of fuel and improper mixing of fuel & combustion air

B. Insufficient supply of combustion air and insufficient time for combustion

D. Poor design & overloading of furnace

A. NO2

C. SO2 & SO3

D. NH3

A. A primary pollutant

B. A secondary pollutant

C. Impervious to ultra-violet rays

A. 25

C. 50

D. 120

B. Nervous system disorder

C. Blood poisoning

D. Anaemia

A. 1 to 1.5

B. 13 to 14

D. 4 to 5

B. Noise pollution

C. Radioactive rays

D. Thermal pollution

A. Hydrogen

B. Petrol vapor

D. Carbon monoxide

A. 5

C. 1

D. 0.1

A. Ultra filtration

C. Centrifugation

D. Floatation & skimming

A. Colorimeter

C. Electro-chemical cell

D. Turbidimeter

A. Characterisation of boiler feed water

C. Organic concentration in gaseous effluents

D. Characterisation of solid wastes

B. CO2

C. SO2

D. Hydrocarbons

B. Biological oxidation

C. Skimming off

D. Chlorination

A. Bog iron (iron oxide)

B. Pulverised limestone

D. Active carbon

A. Inlet gas velocity

B. Overall height

D. Diameter

B. Cooling water

C. Potable water

D. Distilled water

A. Nervous depression

C. Gastritis and diarrhea

D. Paralysis of muscles & loss of appetite

A. Chemical coagulation

B. Biological oxidation pond

D. Lagooning

A. Stratosphere

B. Ionosphere

D. None of these

B. In clarifiers

C. In vacuum filter

D. By chemical coagulation

A. Petroleum refinery

B. Sulphuric acid plant

C. Thermal power plant

A. Water

B. Radioactive

C. Noise

B. 0.05

C. 1

D. 15

A. None of these

C. Filtration and recycling for cooling coke oven gas

D. Discharging in the river stream

B. 1.8

C. 13.4

D. 6.2

B. N2

C. H2

D. CO2

A. Reynold stresses

B. Shear forces

D. Neither A. nor B.

A. Cancer

C. Corrosion

D. Asphyxiation

B. Bad odour

C. Turbidity

D. Bad taste & colour

A. None of these

B. Thermosphere

D. Stratosphere

A. 70

B. 7

C. 30

B. 20

C. 1500

D. 750

A. Total count

B. Presumptive

C. Electometric

A. Explosion hazards

B. Undesirable plants growth

D. Fire hazards