Q. No.CNG is better than petrol and diesel
(1) It burns more efficiently
(2) Is left unburnt in very little amount
(3) Cheaper
(4) All of these
Noise pollution can be controlled by
(1) Use of sound absorbent material
(2) Delimitation of horn free zones around hospitals and schools
(3) Permissible sound levels of crackers and timing of loud speakers
(4) All of these
Harmful effects of Air pollutants depend upon
(1) Organism exposed
(2) Duration of exposure
(3) Concentration of pollutants
(4) All of these
Catalytic converter does
(1) Unburnt Hydrocarbons are converted into carbon dioxide and water
(2) CO is converted into Carbon dioxide
(3) Nitric oxide is converted into Nitrogen gas
(4) All of these
The most effective device to remove particulate matter from polluted air is:
1. electrostatic precipitator
2. cyclonic separator
3. trajectory separator
4. scrubber
Smokestacks of thermal power plants, smelters and other industries release
(1) Particulate air pollutant
(2) Gaseous air pollutant
(3) Harmful gases
(4) All of these
The particulate matter cannot cause
(1) Breathing respiratory symptoms
(2) Irritation, premature death
(3) Inflammation and damage to the lungs
(4) Gastric ulcer and Rhinitis
Noise does not cause
(1) Sleeplessness
(2) Increased heartbeat, Altered breathing pattern
(3) Nausea, change in vision
(4) Stress
All the buses of Delhi were converted to run on CNG
(1) Before the orders of Supreme court
(2) By the end of 2002
(3) In 1990
(4) Under the act of environment in 1987
Catalytic converters are fitted into automobiles for reducing emission of poisonous gases. The converters are made up of metals namely
1. Fe, Cu and Rh
2. Pt, Pd and Rh
3. Al, Pd and Th
4. Fe, Cu and Pd
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