5791. The resistance of water to the passage of light through it is a measure of the
Turbidity
Color
Hardness
Dissolved gases
✅ The correct answer is option A.
Chemical Engineering
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5792. Inhalation of silica dust by human being causes
Asphyxiation
Shortness of breath
Tuberculosis
Both B & C
✅ The correct answer is option D.
5793. Lead exhausted in the atmosphere by automobiles using leaded petrol (i.e. tetraethyl lead for improving octane number) is a lethal air pollutant which causes
Paralysis of muscles & loss of appetite
Nervous depression
Gastritis & diarrhea
All of the above
✅ The correct answer is option D.
5794. Hydrogen ion concentration in distilled water is
10⁻⁷
7 x 10⁻⁷
10⁷
7 x 10⁷
✅ The correct answer is option A.
5795. Direct reaction of unsaturated hydrocarbons with either NO or NO₂ produces an eye irritating pollutant compound known as
Photochemical smog
Peroxy acetyl nitrate (PAN) or methyl nitrile
Benzopyrene
Poly acrylonitrile
✅ The correct answer is option B.
5796. The detrimental effect on organism and water quality with temperature rise of aquatic system is the reduction of __________ of water.
Dissolved oxygen content
Biological oxygen demand
Vapor pressure
All of the above
✅ The correct answer is option A.
5797. A shallow pond in which the sewage is retained and biologically treated is called
Oxidation
Imhoff tank
Lagoon
Skimming tank
✅ The correct answer is option A.
5798. Higher concentration of CO₂ in atmosphere
Allows visible solar radiation (ultraviolet) of short wave-length to pass through
Reflects and absorbs the longer wavelength (infra-red) radiations
Prevents solar heat being radiated out completely, resulting in
All of the above
✅ The correct answer is option D.
5799. During which of the following operating conditions of an automobile, carbon monoxide content in the exhaust gas is maximum?
Idle running
Acceleration
Cruising
Deaccelaration
✅ The correct answer is option A.
5800. Threshold limit value (TLV) of CO in air is __________ ppm.
5
50
2000
5000
✅ The correct answer is option B.