A. Automobile exhaust
B. Flue gas of coal based power plant
C. Exhaust of nitric acid plant
D. Exhaust of sulphuric acid plant
Correct Answer: Automobile exhaust ✔
Last Updated: March 11, 2019
Related MCQs
- . Operating principle of cyclone separator is based on the action of __________ dust particles?
- Green house effect is accentuated by__________?
- Presence of volatile compounds like gasoline, oil, alcohol, ether etc. in municipal sewers may cause__________?
- The widest explosive limit is of __________, thereby making it the most explosive gas?
- Automobile exhaust is passed through two compartments catalytic converter employing platinum as catalyst for__________?
- Maximum allowable noise exposure limits for a man working for 8 hours a day in a noisy chemical plant is about __________ decibels?
- Smoke is produced due to__________?
- World environment day is observed every year on the 5th of__________?
- Foul odour and bad taste of water is removed by treating with__________?
- Pick out the wrong statement. A. Caustic embrittlement of boiler’s metallic parts is caused by high concentration of caustic soda in boiler feed water__________?
- Presence of a certain minimum quantity of fluorine is desirable in potable water to prevent__________?
- Bacterial aerobic oxidation of polluted water in biological oxidation ponds is done to purify it. Presence of bacteria helps in__________?
- TLV of mercury in potable (drinking) water is about __________ ppm?
- Presence of iron and manganese in water causes__________?
- Presence of soluble organics in polluted water causes__________?
- Persons working in cement plants and limestone quarries are more prone to disease like__________?
- The ratio of oxygen available to the oxygen required for stabilisation of sewage is called the __________?
- In troposphere (the weather domain), the temperature ‘t’ at height ‘h’ above the spa level in metres is given by (where, temperature at sea level is 15°C and t is in °C ?
- Which of the following is the most severe air pollutant ?
- Dust collection efficiency of a cyclone separator depends upon its__________?
- The major reason of hydrodynamic noise (i.e., noise resulting from liquid flow) is__________?
- Noise produced by cooling fans (employed in air cooled heat exchangers or cooling tower) is mainly caused due to the turbulence created by blade passage through air. It can be reduced by use of a slower fan__________?
- Main pollutants released from iron & steel industry is__________?
- A shallow pond in which the sewage is retained and biologically treated is called__________?
- Suspended solid present in the waste water generated in blast furnace gas cooling and cleaning plant is removed by__________?
- Inhalation of silica dust causes a disease called__________?
- Particles having diameter greater than 75 μm (micrometer = 10-6 mm) are called__________?
- Coal washing waste water containing about 3% suspended solids (comprising of clay, slate, stone etc.) is treated for solid particles removal ?
- Removal of __________ is accomplished by aeration of water?
- Which of the following pollutants, if present in atmosphere is detectable by its odour ?
- Which is the best and the most effective method for the removal of organic contaminant present in the polluted water in very small quantity (say < 200 mg/litre) ?
- Pick out the correct statement ?
- When the concentration of SO2 in air is greater than __________ ppm, it gives a pungent smell?
- Which is the most practical and economical method for removal of suspended solid matter from polluted water ?
- Iron & manganese present as pollutant in water cannot be removed by__________?
- In the context of the chemical process industries, the term BOD is normally associated with the__________?
- Pick out the wrong statement pertaining to ‘green house’ for the plants ?
- Most efficient and suitable dust removal equipment for removal of fly-ash from flue gas in a thermal power plant is the__________?
- White smoke coming out of the chimney of a furnace indicates the use of__________?
- Carbonaceous particles having size less than 1 μm are called__________?
- Methyl isocyanate (MIC) gas (TLV <1 ppm), which caused Bhopal gas tragedy in 1984 falls under the category of __________ toxic gas?
- Beyond what concentration of H2S in air, acute danger to human life exists ?
- Which of the following radioactive wastes emits all α, β & γ rays and hence is the most hazardous of all radioactive emitters ?
- Deaeration of high pressure boiler feed water is done to reduce __________?
- The common pollutant generated in chlor-alkali industry and battery manufacture is __________?
- Permissible safe limit (TLV) of __________ toxic gas is 100-1000 parts per million (ppm)?
- The Killer gas which caused Bhopal gas tragedy in 1984 was__________?
- Which of the following industries discharge mercury as a pollutant ?
- The detrimental effect on organism and water quality with temperature rise of aquatic system is the reduction of __________ of water?
- Which of the following is the most lethal water pollutant ?
- In large thermal power stations very fine particulates present in flue gas are removed by__________?