External Treatments for Softening of Water (I)

Zeolite process is .............. process

• an ion exchange

• chemical

• precipitation

• physicochemical

residual hardness of Zeolite process is...... ppm

• 0-15

• 10-15

• 0-10

• 0-20

acidic water can not be softened by........ process

• ion exchange

• zeolite

• distillation

• lime-soda

post operation are required in ........ process

• zeolite

• ion exchange

• lime soda

• permutit

pre-analysis of water is essential before ............ process

• lime-soda

• zeolite

• ion exchange

• permutit

Select false statement for zeolite process

• it is permutit process

• treated water contains no dissolved solid

• it is an ion exchange process

Residual hardness of ion exchange process is ....... ppm

• 0-2

• 0-5

• 0-10

For ion exchange process, raw water must be free of

• acids

• suspended matter

• alkalis

Zeolite and ion exchange processes require .........

• Regeneration

• chemicals

• post operations

Deionised water is obtained by ......... process

• zeolite

• permutit

• ion exchange