Question: Pick up the correct statement from the following?
- 1. Inlets are provided on the road surface at the lowest point for draining rain water
- 2. Inlets are generally provided at an interval of 30 m to 60 m along straight roads
- 3. Inlets having horizontal openings, are called horizontal inlets
- 4. All the above
Question: Pick up the correct statement from the following?
- 1. The circular section of sewers provides maximum hydraulic mean depth
- 2. The circular sewers are provided for separate sewerage system
- 3. The circular sewers work efficiently if the sections run at least half full
- 4. All the above
Question: Pick up the correct statement from the following?
- 1. Anaerobic bacteria flourish in the absence of oxygen
- 2. Aerobic bacteria flourish in the presence of oxygen
- 3. Facultative bacteria flourish with or without oxygen
- 4. All the above
Question: Pick up the incorrect statement from the following?
- 1. The mixture of water and waste products, is called sewage
- 2. The treated sewage effluents, are generally used for irrigating the crops
- 3. The process of collecting, treating and disposing off the sewage, is called sewerage
- 4. The old convergence system was definitely better than water carried sewerage system
Question: Pick up the incorrect statement from the following?
- 1. The process of decomposing the organic matter under controlled anaerobic conditions, is called sludge digestion
- 2. Sludge digestion is carried out in sludge tank
- 3. The gases produced in sludge digestion process, contain 75% carbon dioxide
- 4. The gases produced in sludge digestion process, contain 75% methane
Question: The fire demand of a city may be worked out by _________________?
- 1. Kuichling’s formula
- 2. Freeman formula
- 3. Under Writers formula
- 4. All the above.
Question: The yield of a rapid gravity filter as compared to that of slow sand filter, is__________________?
- 1. 10 times
- 2. 15 times
- 3. 20 times
- 4. 30 times
Question: Sunlight_________________ ?
- 1. helps growth of bacterias
- 2. impedes growth of algae
- 3. increases dissolved oxygen content
- 4. reduces turbidity
Question: Average annual rainfall at any station is the average of annual rainfall over a period of________________?
- 1. 7 years
- 2. 14 years
- 3. 21 years
- 4. 35 years
Question: Surge tanks are used_______________?
- 1. for storage water
- 2. to increase the velocity in a pipeline
- 3. as overflow valves
- 4. to guard against water hammer
