Worksheets15/01/26-Civilwar-Overseer Grade 1-Chemical water quality parame
Total questions: 10
Worksheet time: 10mins
Name
Class
Date
1.
Total solids in water are determined by
a)
Filtration and drying
b)
Chemical precipitation
c)
Evaporation and weighing the residue
d)
Titration with EDTA
2.
The relation between total dissolved solids (TDS) is;
TS-Total solids, TSS-Total suspended solids
a)
TDS = TS - TSS
b)
TDS = TSS − TS
c)
TDS = TS + TSS
d)
TDS = TS × TSS
3.
Volatile solids in water analysis are determined using
a)
Hot air oven
b)
Desiccator
c)
Muffle furnace
d)
Water bath
4.
Permissible limit of Total Dissolved Solids (TDS) in drinking water is
a)
500–2000 ppm
b)
250–500 ppm
c)
200–300 ppm
d)
2000–4000 ppm
5.
Which indicator is used for detecting alkalinity at pH above 8.3?
a)
Methyl orange
b)
Litmus
c)
Phenolphthalein
d)
Starch
6.
Hydroxide and bicarbonate alkalinity
a)
Always coexist
b)
Cannot exist together
c)
Exist only at neutral pH
d)
Occur only in acidic water
7.
The colour change in EDTA method of hardness determination is
a)
Yellow to red
b)
Blue to green
c)
Pink to colourless
d)
Wine red to blue
8.
Presence of nitrate in drinking water beyond limits causes
a)
Dental fluorosis
b)
Goitre
c)
Blue baby syndrome
d)
Cholera
9.
Dissolved oxygen in water is commonly measured by
a)
Mohr’s method
b)
Winkler’s method
c)
EDTA titration
d)
Turbidimetry
10.
Acceptable limit of nitrate in drinking water as per IS 10500 is
a)
25 mg/L
b)
35 mg/L
c)
45 mg/L
d)
50 mg/L
100 %
