A. 0.1 ppm
B. 0.01 ppm
C. 0.001 ppm
D. 0.0001 ppm
The phenolic compounds in public water supply should not be more than_______________? Read More »
Environmental EngineeringThe maximum discharge of a tube-well is about_________________? Read More »
Environmental Engineering A. suspended impurities
B. dissolved impurities
C. both suspended and dissolved impuri¬ties
D. none of the above
Ground water is usually free from________________? Read More »
Environmental Engineering A. 2
B. 5
C. 7
D. 10
Which of the following values of pH represents a stronger acid? Read More »
Environmental EngineeringOrthotolidine test is used for determination of________________? Read More »
Environmental Engineering A. 5 to 10 cm/sec.
B. 15 to 30 cm/sec.
C. 15 to 30 cm/minute
D. 15 to 30 cm/hour
The velocity of flow of water in a sedimentation tank is about__________________? Read More »
Environmental Engineering A. particle size is decreased
B. the surface area of tank is increased
C. the depth of tank is decreased
D. none of the above
