0.001 to 0.01
02 to 0.3
2 to 3
5 to 10
✅ The correct answer is option B.
Chemical Engineering MCQs
Which of the following fine dust removal equipments is the most efficient?
Bag filter
Scrubber
Electrostatic precipitator
Cyclone separator
✅ The correct answer is option C.
High noise level in a chemical plant can be controlled by the
Suppression of noise at the source itself
Path control of noise
Protection of operating personnel
All of the above
✅ The correct answer is option D.
In troposphere (the weather domain), the temperature ‘t’ at height ‘h’ above the spa level in metres is given by (where, temperature at sea level is 15°C and t is in °C.)
t = 15 – 0.0065h
t = 15 + 0.0065h
t = 0.0035h -15
t = 15 – 0.0035h
✅ The correct answer is option A.
‘Safe limit’ called Threshold Limit Value (TLV) of carbon monoxide in atmospheric air is < 50 ppm. The main source of carbon monoxide pollutant in air is the
Industrial chimney exhaust
Automobiles exhaust
Photochemical reaction in polluted atmosphere
Burning of domestic fuel
✅ The correct answer is option B.
Atmospheric pollution caused by the exhaust gas of supresonic transport air-crafts is mostly in the atmospheric region called
Thermosphere
Stratosphere
Troposphere
Mesosphere
✅ The correct answer is option B.
Noise level in a quiet private business office is about __________ decibels.
25
50
70
85
✅ The correct answer is option B.
Photochemical smog is formed from automobile exhaust
By reaction of hydrocarbon & nitric oxide in presence of sunlight
Appears only on sunny days
Is harmful for crops and trees also besides causing eye irritation & asthma
All of the above
✅ The correct answer is option D.
In water treatment plant, zeolite process is used to remove the __________ of water.
Acidity
Alkalinity
Hardness
Iron & zinc
✅ The correct answer is option C.
During sewage treatment, the sewage is subjected to __________ treatment in Imhoff tank.
Filtration
Digestion
Sedimentation
Both B and C
✅ The correct answer is option D.