85
105
125
145
✅ The correct answer is option B.
Chemical Engineering MCQs
Inhalation of lead compounds present in automobile exhaust (using leaded petrol) causes
Blood poisoning
Anaemia
Nervous system disorder
All of the above
✅ The correct answer is option D.
Presence of excess flourine in water causes
Dental cavity
Tooth decay
Fluorosis
Respiratory disease
✅ The correct answer is option C.
What is the major constituents of waste/polluted water discharged from textile, pulp & paper, tanning, distillary, dairy and meat packing industries?
Radioactive substances
Natural organic products
Inorganic pollutants
None of these
✅ The correct answer is option B.
Insufficient washing of sand grains in a rapid sand filter causes
Air binding
Shrinkage of filtering media
Mud balls
Expansion of filtering media
✅ The correct answer is option C.
Hazardous/polluting chemical industries should have an ‘exclusion zone’ with a green belt and general public access prohibited around it, covering a radius of ____ metres.
100
1000
400
4000
✅ The correct answer is option B.
Water filtration rate in a rapid sand filter ranges from __________ kilolitres/m²/hr.
0.1 to 1
3 to 6
10 to 15
15 to 20
✅ The correct answer is option B.
The biological decomposition of organic substances in wastes controlled conditions is called
Incineration
Biological oxidation
Composting
None of these
✅ The correct answer is option C.
Exposure to SO₂ containing chimney gases results in the
Reduction in strength of leather & cloth
Acceleration of corrosion rates of metals
Increased drying & hardening time of paints
All of the above
✅ The correct answer is option D.
Noise level heard at a distance of about 100 metres from a jet engine with after burner is about __________ decibels.
120
140
170
200
✅ The correct answer is option C.