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WorksheetsDAY 30 WORKSHEET LSGD (Water Quality and Sources )
Total questions: 15
Worksheet time: 8mins
The correct sequence of subsurface water movement from the surface to deep strata is —
Percolation → Infiltration
Infiltration → Percolation
Absorption → Filtration
Seepage → Absorption
Which of the following wells does not contain a strainer and draws water from a single water-bearing stratum?
Strainer well
Slotted well
Cavity well
Gravel-packed well
The size range of colloidal impurities present in water is —
10⁻¹ to 10⁻³ mm
10⁻³ to 10⁻⁶ mm
10⁻⁶ to 10⁻⁸ mm
10⁻⁸ to 10⁻¹⁰ mm
The average domestic water demand in an Indian city (GOI manual) lies in the range of —
100–150 lpcd
135–225 lpcd
200–300 lpcd
50–100 lpcd
The temperature limit for potable water beyond which it becomes unfit for drinking is —
20°C
26°C
35°C
40°C
TRUE OR FALSE
Contaminated water is always polluted, but polluted water may not be contaminated.
True
False
TRUE OR FALSE
Gravity springs yield water due to hydrostatic pressure between two impervious layers.
True
False
The chemical compound H₂O is called (a) water.
The permissible temperature range for drinking water is ________ to ________ °C.
(a)
The most common and widely used tube well type in India is the (a) well.
The main underground layer that stores and yields groundwater is called an (a) .
Water that contains harmful impurities making it unfit for drinking is called (a) water.
MATCH THE FOLLOWING
A. Strainer well 1. Flow is spherical from bottom
B. Slotted well 2. Has gravel-packed annular space
C. Cavity well 3. Flow is horizontal and radial
D. Artesian well 4. Water under pressure, may flow naturally
A–2, B–3, C–1, D–4
A–3, B–2, C–1, D–4
A–3, B–1, C–2, D–4
A–3, B–2, C–4, D–1
MATCH THE FOLLOWING
A. Potable water 1. Found in nature before treatment
B. Raw water2. Chemically pure H₂O
C. Wholesome water3. Treated, free from harmful impurities
D. Pure water4. Safe and suitable for drinking
A–4, B–3, C–, D–2
A–4, B–1, C–3, D–2
A–4, B–1, C–2, D–3
A–1, B–4, C–3, D–2
Water unfit for drinking = (a)
