.1mg/l

.15mg/l

1mg/l

1.5mg/l

1NTU

1.5NTU

5NTU

None of the above

60-65%

80%

40%

None of the above

a) results in reduction of pH of the treated water.

b) results in increase of pH of the treated water.

c) results in no change in pH of the treated water.

d) may cause and increase or decrease of pH of the treated water

TCU

Hazan unit

Both of these

None of this

4.75mm

Less than 4.75

Greater than 4.75

None of these

Kuichling formula

Fire board underwriters formula

Freemans formula

Bustons formula

All of the above

Turbidity rod

Jackson turbidity meter

Baylis turbidity meter and nephelometer

All the above

None of these