Environmental Engineering

A. dysentery
B. cholera
C. typhoid
D. maleria

A. 0.1 ppm
B. 0.01 ppm
C. 0.001 ppm
D. 0.0001 ppm

A. 5 litres/sec
B. 50 litres/sec
C. 500 litres/sec
D. 1000 litres/see

A. suspended impurities
B. dissolved impurities
C. both suspended and dissolved impuri¬ties
D. none of the above

A. hardness in water
B. turbidity in water
C. dissolved oxygen in water
D. residual chlorine in water

A. 2
B. 5
C. 7
D. 10

A. 10 ppm
B. 20 ppm
C. 30 ppm
D. 50 ppm

A. dissolved oxygen
B. residual chlorine
C. biochemical oxygen demand
D. dose of coagulant

A. 0.01 to 0.05 ppm
B. 0.05 to 0.5 ppm
C. 0.5 to 1.0 ppm
D. 1.0 to 5.0 ppm

A. 5 to 10 cm/sec.
B. 15 to 30 cm/sec.
C. 15 to 30 cm/minute
D. 15 to 30 cm/hour