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.Management Sciences
Category: Chemical Environmental Engineering
Persons working in cement plants and limestone quarries are more prone to disease like__________________?
A. Cancer
B. Asthma
C. Silicosis
D. Fluorosis (bone disease)
____________ substances present in sewage are removed in grit chamber during sewage treatment?
A. Organic
B. Fatty
C. Inorganic
D. Dissolved
There are thirteen metals which are treated as pollutants. Which of the following metals is not a pollutant ?
A. Mercury
B. Arsenic
C. Aluminium
D. Lead
Which of the following air pollutants is not toxic to vegetation i.e., doesn’t cause vegetation damage ?
A. Smog & ozone
B. Hydrogen fluoride & nitrogen oxides
C. Sulphur dioxide & spray of weed killers
D. Carbon monoxide
Which of the following gases is having the widest explosion limit (about 2 to 81% gas in gasair mixture), rendering it the property of the most explosive gas ?
A. Hydrogen
B. Acetylene
C. Carbon monoxide
D. Ammonia
Radioactive substances present in the polluted water stream can be removed by_________________?
A. Biological oxygen treatment
B. Coagulation and filtration
C. Adsorption in ion exchange materials
D. None of these
Which of the following radioactive wastes emits all α, β & γ rays and hence is the most hazardous of all radioactive emitters ?
A. I-131
B. Sr-90
C. Au-198
D. Ra-226
Septic tanks are used for the ______________ of the deposited solids?
A. Separation
B. Anaerobic decomposition
C. Aerobic decomposition
D. None of these
Which of the following acts as a natural source of air pollution ?
A. Forest fire
B. Deforestation
C. Volcanic eruption
D. None of these
Pick out the correct statement ?
A. Deforestation helps in controlling the green house effect
B. Global warming is detrimental for increase in food productivity and may cause flood and
cyclone
C. Lightening discharges are natural source of production of SO2 & H2S pollutant
D. Sulphur dioxide causes death by asphyxiation
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