## As per IS : 1172-1963, water required per head per day for average domestic purposes, is__________?

**Option A:** 50 litres

**Option B:** 65 litres

**Option C:** 85 litres

**Option D:** 105 litres

**Correct Answer: **135 litres ✔

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**Option A:** 1880 kilo litres

**Option B:** 2880 kilo litres

**Option C:** 3880 kilo litres

**Option D:** 4880 kilo litres

**Correct Answer: **2880 kilo litres ✔

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**Option A:** odour

**Option B:** colour

**Option C:** bacterias

**Option D:** hardness

**Correct Answer: **odour ✔

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**Option A:** odour

**Option B:** bacterias

**Option C:** turbidity

**Option D:** colour

**Correct Answer: **bacterias ✔

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**Option A:** 2 m

**Option B:** 2.25 m

**Option C:** 2.50 m

**Option D:** 2.75 m

**Correct Answer: **3.00 m ✔

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**Option A:** is the time taken, for precipitation

**Option B:** duration of rainfall.

**Option C:** time taken for all the ran off to reach the drain

**Option D:** time taken for the storm water to travel from the most remote point to the drain

**Correct Answer: **time taken for the storm water to travel from the most remote point to the drain ✔

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**Option A:** 60 mg/litre

**Option B:** 75 mg/litre

**Option C:** 100 gm/litre

**Option D:** 150 mg/litre

**Correct Answer: **60 mg/litre ✔

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**Option A:** Mineral acids

**Option B:** Free CO2

**Option C:** Iron sulphate

**Option D:** Aluminium sulphate

**Correct Answer: **All the above ✔

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**Option A:** reducing the draw down and the pumping rate

**Option B:** reducing the flow velocity

**Option C:** using thicker pipes

**Option D:** using screens having larger area of openings

**Correct Answer: **using screens having larger area of openings ✔

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**Option A:** 2 m

**Option B:** 3 m

**Option C:** 4 m

**Option D:** 5 m

**Correct Answer: **6 m ✔

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**Option A:** Darcy’s formula

**Option B:** Slichter’s formula

**Option C:** Hazen’s formula

**Option D:** Lacy’s formula

**Correct Answer: **Darcy’s formula ✔

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**Option A:** Clay

**Option B:** Sand

**Option C:** Silt

**Option D:** Coarse gravel

**Correct Answer: **Coarse gravel ✔

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**Option A:** size of the city

**Option B:** climatic conditions

**Option C:** pressure in water mains

**Option D:** cost of water

**Correct Answer: **all the above ✔

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**Option A:** Boarding schools

**Option B:** Nurses home and medical quarters

**Option C:** hostels

**Option D:** all the above

**Correct Answer: **all the above ✔

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**Option A:** wells

**Option B:** springs

**Option C:** infiltration wells

**Option D:** storage reservoirs

**Correct Answer: **storage reservoirs ✔

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**Option A:** 1500 m

**Option B:** 1505 m

**Option C:** 1475 m

**Option D:** 1485 m

**Correct Answer: **1485 m ✔

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**Option A:** 7.2 mm

**Option B:** 7.9 mm

**Option C:** 8.6 mm

**Option D:** 10 mm

**Correct Answer: **8.6 mm ✔

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**Option A:** calcium sulphate

**Option B:** magnesium sulphate

**Option C:** calcium nitrate

**Option D:** calcium bicarbonate

**Correct Answer: **calcium bicarbonate ✔

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**Option A:** light in weight and easy to transport

**Option B:** highly resistant to corrosion

**Option C:** high flexible to accommodate deflection upto 12°

**Option D:** very much smooth and hydraulically efficient

**Correct Answer: **all the above ✔

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**Option A:** lower point

**Option B:** higher point

**Option C:** junction points

**Option D:** any where

**Correct Answer: **lower point ✔

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**Option A:** for storage water

**Option B:** to increase the velocity in a pipeline

**Option C:** as overflow valves

**Option D:** to guard against water hammer

**Correct Answer: **to guard against water hammer ✔

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## Average annual rainfall at any station is the average of annual rainfall over a period of__________?

**Option A:** 7 years

**Option B:** 14 years

**Option C:** 21 years

**Option D:** 28 years

**Correct Answer: **35 years ✔

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**Option A:** helps growth of bacterias

**Option B:** impedes growth of algae

**Option C:** increases dissolved oxygen content

**Option D:** reduces turbidity

**Correct Answer: **impedes growth of algae ✔

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**Option A:** 10 times

**Option B:** 15 times

**Option C:** 20 times

**Option D:** 30 times

**Correct Answer: **30 times ✔

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**Option A:** Kuichling’s formula

**Option B:** Freeman formula

**Option C:** Under Writers formula

**Option D:** Bustan’s formula

**Correct Answer: **All the above. ✔

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