Top 10 viva/interview questions on total dissolved solids and suspended solids in water sample

Total dissolved solids

Total dissolved solids are the materials that are completely dissolved in water. These solids are filterable in nature. It is defined as residue upon evaporation of filtration.

Total suspended solids 

Total suspended solids are the materials which are not dissolved in water and are non filterable in nature. It is defined as residue upon evaporation of non filterable sample on a filter paper.

Here are some important viva question-answers based on total dissolved solids and total suspended solids.

1. The pore size of the filter paper used for filtration is

a) 2.0µm or smaller
b) 2.0µm or bigger
c) 2.0µm
d) 20.0µm

2. The type of crucible used for the experiment is made of _______.

a) Porcelain
b) Clay
c) Silver
d) Iron

3. Total Suspended Solids are mostly responsible for

a) Turbidity.
b) colour
c) Odour
d) Taste

4. The chemical substance used in the desiccators is _____.

a) Calcium Chloride
b) Calcium Carbonate
c) Sodium Chloride
d) Sodium Hydroxide

5. Always the Total Suspended Solids value will be

a) Less than Total Dissolved Solids
b) Greater than Total Dissolved Solids
c) Less than Total Solids
d) Greater than Total Solids

6. High total dissolved solids indicates lower level of hardness.

a) True
b) False

7. The concentration of dissolved solids in water can be determined by specific

conductance.
a) True
b) False

8. The settleable suspended solids with diameter 0.15 to 0.2mm are generally

a) inorganic
b) Organic
c) algae
d) fungi

9. The dissolved solids that impose BOD are ______.

a) volatile solids
b) non volatile solids
c) inorganic solids
d) total solids

10. As per IS Code the acceptable TDS value is

a) 250 ppm
b) 500 ppm
c) 750 ppm
d) 900 ppm

ANSWER KEY:
1) a
2) a
3) a
4) a
5) c
6) False
7) True
8) a
9) a
10) b

If you have some question other than above about this topic feel free to ask in the comments sections.