Noise pollution level in a chemical plant is expressed in __________________?

Related Mcqs:

Fresh sewage is ______________ in nature?

A. Acidic B. Neutral C. Alkaline D. Highly acidic...

Pick out the correct statement?

A. Noise from ball mills can be dealt with by fibre glass lined enclosures B. Noise from vibrating chutes can be reduced by lining the metallic chute with rubber C. Noise of conveyor belt system is reduced by using urethane coated cloth conveyor belts and rubber/plastic covered metallic rollers D. All A., B. & C....

‘Safe limit’ called Threshold Limit Value (TLV) of carbon monoxide in atmospheric air is < 50 ppm. The main source of carbon monoxide pollutant in air is the____________________?

A. Industrial chimney exhaust B. Automobiles exhaust C. Photochemical reaction in polluted atmosphere D. Burning of domestic fuel...

Hazardous/polluting chemical industries should have an ‘exclusion zone’ with a green belt and general public access prohibited around it, covering a radius of _____________ metres?

A. 100 B. 1000 C. 400 D. 4000...

Atmospheric pollution caused by the exhaust gas of supersonic transport air-crafts is mostly in the atmospheric region called________________?

A. Thermosphere B. Stratosphere C. Troposphere D. Mesosphere...