- (A) Turbidity
- (B) Caustic embrittlement
- (C) Suspended silica
- (D) Dissolved oxygen
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Latest MCQs
- (A) Oxides of sulphur
- (B) Oxides of nitrogen
- (C) Carbon monoxide
- (D) Hydrogen sulphide
- (A) Use of silencers
- (B) Green house gases
- (C) Vibration damping
- (D) Tree plantation
- (A) Hydrocarbons
- (B) Hydrogen fluoride
- (C) Hydrogen sulphides
- (D) Nitrogen dioxide
- (A) 20
- (B) 100
- (C) 400
- (D) 200
- (A) 90
- (B) 120
- (C) 150
- (D) 180
- (A) Stratosphere
- (B) Thermosphere
- (C) Troposphere
- (D) Mesosphere
- (A) Foul smell and taste
- (B) Iron and manganese
- (C) Temporary hardness
- (D) Permanent hardness
- (A) Thermosphere
- (B) Stratosphere
- (C) Troposphere
- (D) Mesosphere
- (A) Photochemical smog
- (B) Peroxyacetyl nitrate (PAN) or methyl nitrite
- (C) Benzopyrene
- (D) Polyacrylonitrile
