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Worksheets14/01/26-Civilwar-Overseer grade 1-water Sources 2& phy. water
Total questions: 10
Worksheet time: 5mins
In which zone is the water present termed as internal water?
Zone of aeration
Zone of saturation
Zone of rock fracture
Zone of rock flowage
The boundary separating the zone of aeration and zone of saturation is known as:
Capillary fringe
Water table
Piezometric surface
Cone of depression
The vertical distance through which the water table is lowered due to pumping is called:
Radius of influence
Drawdown
Yield
Capillary rise
The distance from the centre of a pumped well to the point where drawdown is negligible is called:
Drawdown curve
Cone of depression
Radius of influence
Effective radius
Suspended impurities in water generally lie in the size range of:
10⁻⁶ to 10⁻⁸ mm
10⁻³ to 10⁻⁶ mm
10⁻¹ to 10⁻³ mm
Greater than 1 mm
Which type of impurity shows Brownian movement?
Suspended impurities
Dissolved impurities
Colloidal impurities
Gaseous impurities
Which of the following units is used to express true colour of water?
NTU
JTU
TCU
TON
The instrument used for measurement of colour of water is:
Nephelometer
Tintometer
Osmoscope
Conductivity meter
Which turbidity measuring instrument works on the principle of light scattering and is highly accurate for low turbidity?
Jackson turbidimeter
Baylis turbidimeter
Turbidity rod
Nephelometer
The acceptable limit of Total Dissolved Solids (TDS) in drinking water is:
250 mg/L
500 mg/L
1000 mg/L
2000 mg/L
