Water Treatment MCQs

Question 1

Inhibitors are used along with sanitizer to

Accepted Answer

to prevent corrosion

Answer

improve their action

Answer

both (a) and (b)

Answer

none of these

Question 2

Sanitizers used for rubber made equipments are

Accepted Answer

strong alkalis

Answer

strong acids

Answer

combination of both

Answer

none of these

Question 3

Which of the following substances are commonly used in a filter?

Accepted Answer

Both (a) and (b)

Answer

Charcoal

Answer

Sand

Answer

Aluminum chloride

Question 4

Biological oxidation processes usually referred as biological treatment, are the most common form of

Accepted Answer

secondary treatment

Answer

primary treatment

Answer

tertiary treatment

Answer

all of these

Question 5

The maximum permissible limit (BIS) of turbidity in drinking water is

Accepted Answer

10 NTU

Answer

5 NTU

Answer

15 NTU

Answer

20 NTU

Question 6

Sedimentation is a physical process used in wastewater treatment to

Accepted Answer

remove particles that are more dense than water

Answer

remove particles that are less dense than water

Answer

remove the pertinacious material from the water

Answer

none of the above

Question 7

The ultimate source of water is

Accepted Answer

rain and snow

Answer

rivers and lakes

Answer

dew and forest

Answer

underground and surface

Question 8

Permanent hardness of water may be removed by the addition of

Accepted Answer

soda ash

Answer

lime

Answer

potassium permagnate

Answer

sodium bicarbonate

Question 9

Both temporary and permanent hardness of water can be removed on boiling water with

Accepted Answer

sodium carbonate

Answer

calcium hydroxide

Answer

calcium oxide

Answer

calcium carbonate