A. SPM
B. Thermal pollution
C. Radioactive rays
D. Noise pollution
A. Oxidation
B. Imhoff tank
C. Lagoon
D. Skimming tank
A. Color
B. Bad taste
C. Foul odour
D. Bacteria
A. 105
B. 135
C. 160
D. 185
A. 0.5
B. 1
C. 3.5
D. 9.05
A. Coal
B. Uranium ore
C. Iron ore
D. Lime
B. Cooling and freezing of water kills the bacteria present in it
C. With increasing boiler operating pressure of steam, the maximum allowable concentration of
silica in feed water goes on decreasing
D. Dissolved oxygen content in high pressure boiler feed water should be nil