Arsenic pollutant is not generated in _______________ industries?
A. Tanneries
B. Glass & ceramic
C. Beverages
D. Any of these
Chemical Environmental Engineering
Pollution by particulate matter emission in the atmosphere does not take place during metal____________________?
Pollution by particulate matter emission in the atmosphere does not take place during metal____________________?
A. Grinding
B. Machining
C. Cutting
D. Polishing
Main pollutant present in automobile exhaust is_________________?
Main pollutant present in automobile exhaust is_________________?
A. CO
B. CO2
C. NO
D. Hydrocarbons
Scale formation in boiler is controlled by____________________?
Scale formation in boiler is controlled by____________________?
A. Preheating of feed water
B. Reduction in hardness, silica & alumina in feed water
C. Keeg the pH value of feed water just below 7
D. Eliminating H2S in feed water
Noise level heard at a distance of about 100 metres from a jet engine with after burner is about _____________ decibels?
Noise level heard at a distance of about 100 metres from a jet engine with after burner is about _____________ decibels?
A. 120
B. 140
C. 170
D. 200
Presence of bacteria in potable (drinking) water causes_________________?
Presence of bacteria in potable (drinking) water causes_________________?
A. Turbidity
B. Disease
C. Bad odour
D. Bad taste & colour
TLV of ozone (O3) and phosgene (COCl2) in air is _______________ ppm?
TLV of ozone (O3) and phosgene (COCl2) in air is _______________ ppm?
A. 0.1
B. 25
C. 100
D. 1000
Radioactive substances present in the polluted water stream can be removed by_________________?
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
H2S present in gaseous stream can be removed by adsorption on _____________________?
H2S present in gaseous stream can be removed by adsorption on _____________________?
A. Silica gel
B. Active carbon
C. Bog iron
D. Limestone powder
Maximum permissible turbidity in potable water is _____________ ppm?
Maximum permissible turbidity in potable water is _____________ ppm?
A. 1
B. 10
C. 250
D. 1000