WorksheetsEnvironmental Engineering Unit 3
Total questions: 25
Worksheet time: 13mins
Which of the following is not a method of water distribution?
Gravity system
Pumping system
Combined system
Vacuum system
In a grid iron system, dead ends are:
Absent
Frequent
More
Unavoidable
Which layout is best suited for towns with roads originating from a central point?
Circular system
Radial system
Dead end system
Grid iron system
Water supply to a house begins with the connection of the service pipe with municipal water mains. The connection sequence compromises
1,2,3,4
3,1,2,4
1,2,4,3
3,2,1,4
The intermittent system of supply is objectionable because:
Water is wasted
Contamination enters pipes
Head losses increase
Unequal distribution occurs
Continuous supply system provides water for:
8 hrs/day
12 hrs/day
16 hrs/day
24 hrs/day
What is the IS Code of practice for water supply in buildings?
IS 1172-1993
IS 2065-1983
IS 800-2007
IS 383-1970
Which statement is correct with reference to Grid Iron water distribution system?
Suitable for well planned towns & cities
Requires less number of sluice valves
Cost of construction is low
All of the above
Which type of valve is provided to stop the flow of water?
Sluice valve
Scour valve
Check valve
Air valve
Air valves are located at:
Dead ends
Low points
Summit points
Near hydrants
Scour valves are located at:
Low points
Summit points
Dead ends
Service reservoirs
Which of the following IS Code is used for the basic requirements for water supply, drainage, and sanitation?
IS 456
IS 1035 (Part 32)
IS 10500 (2012)
IS 1172:1993
A dead end system is mostly adopted in:
New towns
Old towns with irregular roads
Metropolitan cities
Grid planned cities
Radial system is generally suitable for:
Villages
Cities with circular roads
Towns with central main source
Small towns only
Which system provides uniform pressure and quick service during fire?
Radial
Dead end
Grid iron
Circular
Service reservoirs are provided to:
Store storm water
Maintain pressure
Treat water
Remove impurities
Which type of valve prevents backflow in water mains?
Gate valve
Air valve
Check valve
Scour valve
Which valve is used to isolate sections of pipeline for repair?
Sluice valve
Check valve
Air valve
Pressure valve
Among the available four distribution systems, which system is called as reticulation system?
Grid iron system
Dead end system
Ring system
Radial system
Which pipe material is most durable for distribution mains?
PVC
Cast iron
RCC
GI
A 1 MLD water supply equals:
1000 m³/day
10,000 m³/day
100 m³/hr
41.7 m³/hr
Water hammer in pipelines is due to:
Slow closing of valves
Rapid closing of valves
Excess pressure head
Leakage
Which distribution system requires the least maintenance?
Grid iron
Circular
Dead end
Radial
The distribution system of water supplies is designed in the basis of
Peak hourly demand
Coincident draft
Average daily demand
Greater of A and B
Which of the following is not a type of water distribution system in water supply?
Only II
Neither I or II
Both I or II
Only I
