A. 10 to 15
B. 20 to 25
C. 30 to 35
D. 40 to 50
The percentage of chlorine in fresh bleaching powder is about________________? Read More »
Environmental Engineering A. applied chlorine
B. residual chlorine
C. sum of applied and residual chlorine
D. difference of applied and residual chlorine
Chlorine demand of water is equal to________________? Read More »
Environmental Engineering A. less than that of slow sand filters
B. in between the filtration rate of slow sand filters and rapid sand filters
C. greater than that of rapid sand filters
D. equal to that of slow sand filters
The rate of Alteration of pressure filters is_________________? Read More »
Environmental Engineering A. 0.2 to 0.4
B. 0.4 to 1.0
C. 2 to 4
D. 5 to 7
A. Both A and R are true and R is the correct explanation of A
B. Both A and R are true but R is not the correct explanation of A
C. A is true but R is false
D. A is false but R is true
The effective size of sand particles used in slow sand filters is_______________? Read More »
Environmental EngineeringIn water treatment, rapid gravity filters are adopted to remove_______________? Read More »
Environmental EngineeringThe alum, when added as a coagulant in water_______________? Read More »
Environmental Engineering A. 2 to 4
B. 4 to 6
C. 6 to 8
D. 8 to 10
