Chapter 27 Introduction to Water Treatment Flashcards
The filtration method of water treatment will:
a) soften the water
b) act to remove suspended solids
c) remove dissolved gases
d) remove suspended liquids
b) act to remove suspended solids
A sodium zeolite water softener will:
a) completely remove the detrimental impurity
b) not change the solubility of the impurity.
c) require backwashing at the end of the regeneration cycle
d) make the impurity highly soluble.
d) make the impurity highly soluble.
The regenerant most often used for regenerating a sodium zeolite softener is
a) Sulphuric acid
b) sodium hydroxide
c) sodium chloride
d) hydrogen chloride
c) sodium chloride
The backwash cycle of a sodium zeolite softener regeneration will
a) flush out excess regenerant
b) loosen or separate and flush the bed of trapped suspended matter
c) allow the regenerant to exchange with the “elemental” impurity
d) follow the rinse cycle of the regeneration.
b) loosen or separate and flush the bed of trapped suspended matter
Material trapped in the bed of a pressure filter is removed by:
a) backwashing the filter
b) heating the bed
c) passing chemicals through the exhausted bed
d) regenerating the bed with a regenerant
a) backwashing the filter
Common methods of removing suspended solids from boiler make-up water are
a) coagulators and softeners
b) evaporators and screens
c) softeners and settling tanks
d) settling tanks and filters
d) settling tanks and filters
A sodium zeolite water softener causes
a) dissolved solids, as compounds, to be removed
b) elements, associated with a radical, to be removed and replaced with elemental sodium.
c) the solubility of a dissolved solid impurity to be lowered
d) brine to become insoluble
b) elements, associated with a radical, to be removed and replaced with elemental sodium.
A method of treatment which is often used in conjunction with settling tanks is
a) deaeration
b) zeolite softening
c) lime soda softening
d) filtration
d) filtration
