A. 10 years
B. 25 years
C. 50 years
D. 75 years
Related Mcqs:
- Sewerage system is designed for_______________?
A. maximum flow only
B. minimum flow only
C. average flow only
D. maximum and minimum flow - For a country like India, where rainfall is mainly confined to one season, the suitable sewerage system will be________________?
A. separate system
B. combined system
C. partially combined system
D. partially separate system - The distribution mains are designed for________________?
A. maximum daily demand
B. maximum hourly demand
C. average daily demand
D. maximum hourly demand on maxi¬mum day - Sewage treatment units are normally designed for______________?
A. 5-10 years
B. 15-20 years
C. 30-40 years
D. 40-50 years - Sewage treatment units are designed for_______________?
A. maximum flow only
B. minimum flow only
C. average flow only
D. maximum and minimum flow - The hourly variation factor is usually taken as______________?
A. 1.5
B. 1.8
C. 2.0
D. 2.7 - Laying of sewers is usually done with the help of________________?
A. a theodolite
B. a compass
C. sight rails and boning rods
D. a plane table - The detention period for oxidation ponds is usually kept as______________?
A. 4-8 hours
B. 24 hours
C. 10 to 15 days
D. 3 months - The detention period in coagulation tanks is usually kept as_______________?
A. 1 to 2 minutes
B. 30 to 45 minutes
C. 2 to 6 hours
D. 2 to 6 days - Ground water is usually free from________________?
A. suspended impurities
B. dissolved impurities
C. both suspended and dissolved impuri¬ties
D. none of the above
