Gypsum
Feldspar
Galena
Bauxite
✅ The correct answer is option D.
Chemical Engineering MCQs
Black smoke coming out of the chimney of a furnace is an indication of the use of __________ in the furnace.
Low amount of excess combustion air
Large quantity of excess combustion air
Hydrocarbon fuel
Pulverised coal as fuel
✅ The correct answer is option A.
A considerable part of the harmful ultraviolet radiation of the sum does not reach the earth surface, because of the fact that, there is a layer of __________ high above earth’s atmosphere, which absorbs it.
Hydrogen
Carbon dioxide
Ozone
None of these
✅ The correct answer is option C.
Most of the atmospheric air pollutants are present in large quantity in
Stratosphere
Thermosphere
Trophosphere
Mesosphere
✅ The correct answer is option C.
Most efficient and suitable dust removal equipment for removal of flyash from flue gas in a thermal power plant is the
Gravity settling chamber
Cyclone separator
Electrostatic precipitator
Bag filter
✅ The correct answer is option C.
Maximum permissible turbidity in potable water is __________ ppm.
1
10
250
1000
✅ The correct answer is option B.
Which of the following is a secondary air pollutant?
Photochemical smog
Sulphur dioxide
Nitrogen dioxide
Dust particles
✅ The correct answer is option A.
The pH value of oxidised sewage is about
1.8
6.2
7.3
13.4
✅ The correct answer is option C.
Oilish impurities present the effluent discharged from the electroplating industry is normally not removed by
Chemical coagulation
Floatation & skimming
Centrifugation
Ultrafiltration
✅ The correct answer is option A.
Reingleman chart is used for the evaluation of __________ pollution.
Air
Water
Noise
Radioactive
✅ The correct answer is option A.