Search
.Management Sciences
Category: Chemical Environmental Engineering
Which of the following processes is involved in the biochemical treatment of sewage effluents ?
0
A. Oxidation
B. Reduction
C. Dehydration
D. Fermentation
Which of the following is a green house gas other than CO2 ?
A. Methane
B. Nitrous oxide
C. Chlorofluoro carbons (CFC)
D. All A., B. and C.
Which of the following is a manmade source of air pollution ?
A. Automobile exhaust
B. Forest fire
C. Bacterial action in soil and swamp areas
D. All A., B. and C.
Water filtration rate in a slow sand filter ranges from ____________ litres/m2/hr?
A. 10 to 20
B. 100 to 200
C. 1500 to 2500
D. 4000 to 5000
The major reason of hydrodynamic noise (i.e., noise resulting from liquid flow) is_________________?
A. Pipe vibrations
B. Cavitation
C. Boundary layer separation
D. Fluctuation in liquid flow
Main pollutants released from petroleum refineries is__________________?
A. CO, SO2 & H2S
B. CO2, NO & SO3
C. CO2, H2S & NO2
D. SO3, NO2 & CO2
The detrimental effect on organism and water quality with temperature rise of aquatic system is the reduction of _____________ of water?
A. Dissolved oxygen content
B. Biological oxygen demand
C. Vapor pressure
D. All A., B. and C.
Aerosols present in atmospheric air may be__________________?
A. Positively charged
B. Negatively charged
C. Neutral
D. Combination of all A., B. & C.
A standard test for determination of hardness in water is termed as ______________ test?
A. EDTA
B. Electometric
C. Total count
D. Presumptive
Recent Comments