Air binding
Shrinkage of filtering media
Mud balls
Expansion of filtering media
✅ The correct answer is option C.
Enviornmental Engineering MCQs
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.
Smoke is produced due to
Insufficient supply of combustion air and insufficient time for combustion
Poor quality of fuel and improper mixing of fuel & combustion air
Poor design & overloading of furnace
All of the above
✅ The correct answer is option D.
TLV of NO₂ & NO exposure for the human being is 5 & 25 ppm respectively. Prolonged exposure of human being to NO₂ causes
Skin disorder
Bronchitis
Bone disease
Cancer
✅ The correct answer is option B.
Which is the most widely used coagulant for the treatment of turbid water?
Alum (aluminium sulphate)
Lime
Ferric chloride
Sodium aluminate
✅ The correct answer is option A.
Radioactive solid nuclear wastes are disposed off by
High temperature incineration
Pathological incineration
Pyrolysis
Underground burial in concrete containers
✅ The correct answer is option D.