Water Supply Engineering MCQs
Water Supply Engineering MCQs
The following Water Supply Engineering MCQs have been compiled by our experts through research, in order to test your knowledge of the subject of Water Supply Engineering. We encourage you to answer these multiple-choice questions to assess your proficiency.
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1: Acidity in water is caused due to
A. Aluminium sulphate
B. All these
C. Mineral acids
D. Iron sulphate
E. Free CO2
2: Time of concentration
A. Time taken for all the ran off to reach the drain
B. Duration of rainfall.
C. Time taken for the storm water to travel from the most remote point to the drain.
D. Is the time taken, for precipitation
3: Average annual rainfall at any station is the average of annual rainfall over a period of
A. 21 years
B. 14 years
C. 35 years.
D. 28 years
E. 7 years
4: Water supply includes
A. Collection, transportation and treatment of water
B. Provision of hydrants for fire fighting
C. Mains, sub-mains and branch lines of water supply
D. All these
E. Distribution of water to consumers
5: Corrosion of well pipes may not be reduced by
A. Using screens having larger area of openings
B. Reducing the draw down and the pumping rate
C. Using thicker pipes
D. Reducing the flow velocity
E. None of these.
6: If four fires break out in a city of population 40 lakhs and if each hydrant has three streams and duration of each fire is four hours, the total quantity of water required, is
A. 4880 kilo litres.
B. 1880 kilo litres
C. 2880 kilo litres
D. 3880 kilo litres
7: Manholes along the mains from the source to a city are provided at 500 m intervals in
A. Steel pipes
B. Hume steel pipes
C. All these
D. R.C.C. pipes
8: Turbidity of raw water is a measure of
A. Suspended solids
B. B.O.D.
C. Acidity of water
D. None of these.
9: Biochemical Oxygen Demand (B.O.D.) of safe drinking water must be
A. 20
B. Nil
C. 5
D. 10
E. 15
10: The least thickness of class B cast iron (spun) pipe, is
A. 8.6 mm
B. 7.2 mm
C. 10 mm.
D. 7.9 mm
11: Economic height of a dam is the height corresponding to which
A. Cost of the dam per unit of storage is minimum
B. None of these.
C. Amount of silting is less
D. Cost of dam per unit storage is maximum
E. Free board provided is least
12: The transitional middle portion of a logistic curve follows
A. A constant rate.
B. A first over curve
C. A logarithmic growth
D. A geometric growth
13: By boiling water, hardness can be removed if it is due to
A. Calcium sulphate
B. Calcium nitrate
C. Magnesium sulphate
D. Calcium bicarbonate
E. None of these.
14: Pick up the correct statement from the following:
A. Excess quantities of iron and manganese in water, cause discolouration of clothes
B. Higher copper content affects the lungs
C. All these
D. Lead and barium salts have toxic effect
E. Arsenic and selenium are poisonous to human health
15: Aeration of water is done to remove
A. Odour
B. Colour
C. Turbidity.
D. Bacterias
E. Hardness
16: Water supply system includes
A. Entire arrangement from source to distribution.
B. Digging a well for water
C. Construction of canals
D. Construction of dams
17: The maximum depth of sedimentation tanks is limited to
A. 4 m
B. 3 m
C. 2 m
D. 5 m
E. 6 m.
18: In slow sland filters, the turbidity of raw water can be removed only up to
A. 100 gm/litre
B. 150 mg/litre.
C. 60 mg/litre
D. 75 mg/litre
19: The specific retention is least in case of
A. Coarse gravel.
B. Clay
C. Sand
D. Silt
20: Pick up the incorrect statement from the following regarding fire hydrants
A. None of these.
B. The minimum water pressure hydrants, is kept 1.5 kg/cm2
C. Fire hydrants are fitted in water mains at 100 m to 150 m apart at fire
D. The water at pressure 1 to 1.5 kg/cm2 is made available for 4 to 5 hours for constant use
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Water Supply Engineering MCQs
