A ‘body’ which allows the short wavelength incoming solar radiation to enter in, but does not allow long wave length outgoing infra red radiation to escape out is called the________________?
(A) Global warming
(B) Green house
(C) Atmospheric effect
(D) Ionosphere
Thermal pollution due to excessive heat & temperature in the working place causes__________________?
(A) Reduction in working efficiency of manpower
(B) Fatigue
(C) High breathing rate
(D) All
Irradiation of water by ultraviolet light of suitable wavelength is commonly used for disinfection of water in___________________?
(A) Food industry
(B) Municipal sewage treatment
(C) Petroleum refinery
(D) Iron & steel plant
Inhalation of lead compounds present in the automobile exhausts (using leaded petrol) causes________________?
(A) Blood poisoning
(B) Anaemia
(C) Nervous system disorder
(D) All
Pick out the one which is not a chemical coagulant ?
(A) Aluminium sulphate
(B) Ferrous sulphate
(C) Hydrated lime
(D) Chloramine
Presence of dissolved impurities of ______________ is responsible for the red brownish color of water?
(A) Carbonates
(B) Bi-carbonates
(C) Iron & manganese
(D) Arsenic
The concentration of water vapour in troposphere, which depends upon the altitude & temperature, varies in the range of zero to ______________ percent?
(A) 1
(B) 4
(C) 8
(D) 12
Turbidity of water is an indication of the presence of__________________?
(A) Suspended inorganic matter
(B) Dissolved solids
(C) Floating solids
(D) Dissolved gases
‘Particulate’ air pollutants are finely divided solids and liquids. Which of the following is not a „particulate‟ ?
(A) Dust & mists
(B) Smoke & fumes
(C) Photochemical smog & soot
(D) None of these
During which of the following operating conditions of an automobile, carbon monoxide content in the exhaust gas is maximum ?
(A) Idle running
(B) Acceleration
(C) Cruising
(D) Deceleration