EXAMIANS
Irradiation of water by ultraviolet light of suitable wavelength is commonly used for disinfection of water in
YOUR ANSWER : ?
YOUR ANSWER : ?
Maximum allowable noise exposure limits for a man working for 8 hours a day in a noisy chemical plant is about __________ decibels.
YOUR ANSWER : ?
Threshold Limit Value (TLV) is the maximum allowable concentration (i.e. safe limit) of pollutants in air. Safe limit for SO₂ in air is __________ ppm.
YOUR ANSWER : ?
__________ content of the phosphate rock is the pollutant of primary interest in a phos-phatic fertiliser plant.
YOUR ANSWER : ?
Soluble silica present in boiler feed water can be removed by
YOUR ANSWER : ?
Presence of __________ in water stream are deleterious to aquatic life.
YOUR ANSWER : ?
Algae growth in water is controlled by
YOUR ANSWER : ?
Presence of nitrogen and phosphorous in waste water discharged into lakes and ponds causes
YOUR ANSWER : ?
Maximum permissible limit of mercury in human blood is __________ micrograms/100 c.c.
YOUR ANSWER : ?
Atmospheric pollution caused by the exhaust gas of supresonic transport air-crafts is mostly in the atmospheric region called
YOUR ANSWER : ?