80% less than 200 mesh size particles are called Aggregates Grit Powder Smoke TRUE ANSWER : ? YOUR ANSWER : ?
Noise level in a quiet private business office is about __________ decibels. 50 85 25 70 TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following acts as a natural source of air pollution? None of these Deforestation Forest fire Volcanic eruption TRUE ANSWER : ? YOUR ANSWER : ?
Smog is not formed due to the presence of __________ in the atmosphere. NOx Any of these CO₂ SO₂ TRUE ANSWER : ? YOUR ANSWER : ?
The maximum CO₂ is emitted into the atmosphere by Urea Biomass burning Trees Combustion TRUE ANSWER : ? YOUR ANSWER : ?
When the concentration of SO₂ in air is greater than __________ ppm, it gives a pungent smell. 0.01 4 0.1 1 TRUE ANSWER : ? YOUR ANSWER : ?
Reinglemann chart is used for the measurement of the Exhaust gas density Smoke density from a chimey Combustibles present in automobile exhaust Flue gas temperature TRUE ANSWER : ? YOUR ANSWER : ?
Scale formation in boiler is controlled by Reduction in hardness, silica & alumina in feed water Keeping the pH value of feed water just below 7 Preheating of feed water Eliminating H₂S in feed water TRUE ANSWER : ? YOUR ANSWER : ?
White smoke coming out of the chimney of a furnace indicates the use of Low excess air Liquid fuel in the furnace Very high excess air Gaseous fuel in the furnace TRUE ANSWER : ? YOUR ANSWER : ?
Oilish impurities present the effluent discharged from the electroplating industry is normally not removed by Centrifugation Floatation & skimming Ultrafiltration Chemical coagulation TRUE ANSWER : ? YOUR ANSWER : ?