CO
CO₂
NO
Hydrocarbons
✅ The correct answer is option A.
Chemical Engineering MCQs
BOD of raw municipal sewage may be in the range of about __________ mg/litre.
1-Feb
5-Oct
150-300
2000-3000
✅ The correct answer is option C.
Which of the following is an adsorbant for removal of nitrogen oxides from gas/air?
Active carbon
Silica gel
Bog iron (iron oxide)
Pulverised limestone
✅ The correct answer is option B.
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)?
Lagooning
Activated carbon adsorption
Biological oxidation pond
Chemical coagulation
✅ The correct answer is option B.
Industrial workers working in leather tanning & manufacturing units are prone to suffer from
Respirtory ailments (e.g. bronchitis)
Skin diseases (e.g. dermatities)
Silicosis
Blurred vision
✅ The correct answer is option B.
Ionisation potential employed in the industrial electrostatic precipitator is of the order of
30 to 70 kV DC
30 to 70 kV AC
230 V AC
230 V DC
✅ The correct answer is option A.
Which of the following is not an air pollutant?
Ozone
Carcinogens
Pesticides
Metallic powders
✅ The correct answer is option A.
Septic tanks are used for the __________ of the deposited solids.
Separation
Anaerobic decomposition
Aerobic decomposition
None of these
✅ The correct answer is option B.
Dust collection efficiency of a cyclone separator depends upon its
Diameter
Inlet gas velocity
Overall height
All of the above
✅ The correct answer is option D.
The main industrial source of emission of hydrogen sulphide air pollutant is
Petroleum refineries
Coal based thermal power plants
Pulp and paper plant
Metallurgical roasting & smelting plant
✅ The correct answer is option B.