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.Management Sciences
Category: Chemical Environmental Engineering
Siderosis is a disease caused by the inhalation of ______________ dust?
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A. Coal
B. Silica
C. Iron
D. None of these
Most of the atmospheric air pollutants are present in large quantity in__________________?
A. Stratosphere
B. Thermosphere
C. Troposphere
D. Mesosphere
Inhalation of silica dust by human being during hand drilling in mica mining, lead & zinc mining, silica refractory manufacture and in foundries causes___________________?
A. Asphyxiation (suffocation)
B. Shortness of breath
C. Tuberculosis
D. All A., B. and C.
Inorganic impurities causing water pollution is ____________________?
A. Fats
B. Carbohydrates
C. Salts of metals
D. Protein
Ethanolamine is an absorbent used for the removal of _____________ from air/gas?
A. HF
B. SO2
C. H2S
D. Both B. & C.
The widest explosive limit is of _____________, thereby making it the most explosive gas?
A. Acetylene
B. Petrol vapor
C. Hydrogen
D. Carbon monoxide
5-200 μm size particles are called__________________?
A. Colloids or aerosols
B. Powder
C. Dust
D. Smoke
TLV of NO2 & NO exposure for the human being is 5 & 25 ppm respectively. Prolonged exposure of human being to NO2 causes_________________?
A. Skin disorder
B. Bronchitis
C. Bone disease
D. Cancer
Removal of ______________ results from the disinfection of water?
A. Turbidity
B. Odour
C. Hardness
D. Bacteria
The ratio of oxygen available to the oxygen required for stabilisation of sewage is called the __________________?
A. Bacterial stability factor
B. Relative stability
C. Biological oxygen demand (BOD)
D. Oxygen ion concentration
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