Permissible safe limit (TLV) of _____________ toxic gas is 100-1000 parts per million (ppm)?

Related Mcqs:

Pick out the wrong statement ?

A. Low ozone layer thickness in polar regions is due to cold climatic conditions B. Amount of unburnt hydrocarbons emitted by two stroke petrol engine is more as compared to that emitted by a four stroke engine C. Carbon monoxide present in the two stroke petrol engine exhaust is much less as compared to that … Pick out the wrong statement ?Read More...

Particles having diameter greater than 75 μm (micrometer = 10-6 mm) are called__________________?

A. Grit B. Dust C. Powder D. Smoke...

‘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...

Oceans act as sinks for atmospheric gases including carbon dioxide whose concentration in the atmosphere is increased by the_______________?

A. Forestation B. Rain C. Green house effect D. Vegetation...

Presence of _____________ hardness is responsible for the temporary hardness in water?

A. Carbonate B. Calcium C. Chloride D. Sulphate...