CLASS B WATER EXAM QUESTIONS WITH CORRECT SOLUTIONS ALL VERIFIED BY AN EXPERT

CLASS B WATER EXAM
QUESTIONS WITH CORRECT




K
C
SOLUTIONS ALL VERIFIED BY

LO
AN EXPERT A+ GRADED
(LATEST)
YC
D
U
ST

, Filtration rate for rapid sand filters?
2-6 gpm/ sq ft




List the characteristics of the coagulation process?
Type of reaction ( physical-chemical)

Time required ( reaction complete in seconds)




K
Mixing intensity ( high intensity mixing is required for proper coagulation)




C
Name the advantages of dual and mixed media filters over plain rapid sand filters??
Higher filtration rate and longer filter runs




LO
Proper way to re fill rapid sand filter that was been out of service
Slowly fill the filter through the backwash valve
YC
List the characteristics of polymers?
Cationic ( net positive charge )

Anionic ( net negative charge )
D

Non-ionic ( no net charge )
U


Name the characteristics of the flocculation process??
Type of reaction ( physical )
ST




Time required ( 20-30 min )

Mixing intensity ( Controlled slow mixing )




Coagulants typically used in the water treatment industry
Alum or aluminum sulfate Al2(SO4)3

Iron salts: Ferric Chloride (FeCl3), Ferrous Sulfate (FeSO4)