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Water Supply Engineering
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Question
One degree of hardness of water means a content of salts of
Options
A. 10.25 mg/litre
B. 12.25 mg/litre
C. 14.25 mg/litre
D. 16.25 mg/litre.
E. 20 mg/litre.
Correct Answer
14.25 mg/litre
Water Supply Engineering problems
Search Results
1. Rapid gravity filter can only remove turbidity of water upto
Options
A. 15 to 25 gm/litre
B. 25 to 30 gm/litre
C. 30 to 35 cm/litre
D. 35 to 40 gm/litre
E. 50 gm/litre.
Show Answer
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Discuss
Correct Answer: 35 to 40 gm/litre
2. Hard water for public water supply is discarded because
Options
A. it consumes more soap
B. it contains lot of turbidity
C. it contains pathogenic bacterias
D. it possesses bad taste and odour
E. none of these.
Show Answer
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Correct Answer: it consumes more soap
3. The run off is affected by
Options
A. size of the basin
B. shape of the basin
C. elevation of the water shed
D. all the above.
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Discuss
Correct Answer: all the above.
4. Pressure exerted by fully saturated air, is known
Options
A. partial pressure
B. vapour pressure
C. saturation vapour pressure
D. saturation pressure
E. (c) and (d) of the above.
Show Answer
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Correct Answer: (c) and (d) of the above.
5. Knowledge of hydrology is necessary for civil engineers for
Options
A. designing and construction of irrigation structures
B. designing and construction of bridges and culverts
C. flood control works
D. all the above.
Show Answer
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Discuss
Correct Answer: all the above.
6. Mostly used coagulant, is
Options
A. chlorine
B. alum
C. lime
D. bleaching powder.
Show Answer
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Correct Answer: alum
7. If
p
is total internal pressure,
d
is diameter of pressure conduit and
t
is thickness of conduit, the Hoop's stress is
Options
A.
B.
C.
D.
Show Answer
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Correct Answer:
8. Hard water contains
Options
A. calcium
B. magnesium bicarbonates
C. magnesium sulphate
D. all the above.
Show Answer
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Correct Answer: all the above.
9. After cleaning a slow sand filter, the filtered water is not used for
Options
A. 6 hours to 12 hours
B. 12 hours to 18 hours
C. 18 hours to 24 hours
D. 24 hours to 36 hours
E. 48 hours.
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Correct Answer: 24 hours to 36 hours
10. Hardness of water is caused due to
Options
A. calcium sulphate
B. magnesium sulphate
C. calcium nitrates
D. calcium bicarbonates
E. all the above.
Show Answer
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Discuss
Correct Answer: all the above.
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