| 1. | Suspended impurities include ? | |
|
algae
|
||
|
protozoa
|
||
|
fungi
|
||
|
all of these
|
||
View Answer
Discuss in Forum
Report Question| 2. | Odours and tastes may result due to the presence of ? | |
|
micro-organisms either dead or alive
|
||
|
dissolved gases such as oxygen, carbon dioxide, methane etc
|
||
|
mineral substances such as sodium chloride, iron compounds etc
|
||
|
all of the above
|
||
| 3. | The water obtained from .............. is generally known as sub-surface water ? | |
|
rains
|
||
|
rivers
|
||
|
reservoirs
|
||
|
artesian well
|
||
| 4. | pH value is a symbol for .......... concentration ? | |
|
magnesium
|
||
|
hydrogen
|
||
|
calcium
|
||
|
sodium
|
||
| 5. | In designing a water works for a city to meet the water demand for public use,a precision about ............... of the total consumption is made ? | |
|
5 %
|
||
|
10 %
|
||
|
20 %
|
||
|
25 %
|
||
| 6. | The presence of bacteria in water causes ? | |
|
hardness
|
||
|
alkalinity
|
||
|
diseases
|
||
|
bad taste
|
||
| 7. | In India, as per Indian standards, water consumption per capita per day for domestic purpose is ? | |
|
85 litres
|
||
|
100 litres
|
||
|
115 litres
|
||
|
135 litres
|
||
| 8. | The water obtained from the tube wells is known as ? | |
|
surface water
|
||
|
sub-surface water
|
||
|
run-off
|
||
|
potable water
|
||
| 9. | The water of a river has an important property called ? | |
|
turbidity
|
||
|
self purification
|
||
|
permeability
|
||
|
infiltration capacity
|
||
| 10. | The open wells or dug wells are also known as ? | |
|
shallow wells
|
||
|
draw wells
|
||
|
percolation wells
|
||
|
all of these
|
||