Dissolved oxygen in streams is______________? September 7, 2025 by Admin A. maximum at noon B. minimum at noon C. maximum at midnight D. same throughout the day ✅ The correct answer is option A.
Which of the following methods of analysis of water distribution system is most suitable for long and narrow pipe system ? September 7, 2025 by Admin A. circle method B. equivalent pipe method C. Hardy cross method D. electrical analysis method ✅ The correct answer is option B.
The process of lagooning is primarily a means of________________? September 7, 2025 by Admin A. reducing the excessive flow in sewers B. disposing of sludge C. increasing the capacity of storage re-servoirs D. increasing flow of sewage through imhoff tanks ✅ The correct answer is option B.
Which of the following causes a decrease in per capita consumption ? September 7, 2025 by Admin A. use of metering system B. good quality of water C. better standard of living of the people D. hotter climate ✅ The correct answer is option A.
The suitable layout of a distribution system for irregularly growing town is_______________? September 7, 2025 by Admin A. dead end system B. grid iron system C. radial system D. ring system ✅ The correct answer is option A.
A pipe conveying sewage from plumbing system of a single building to common sewer or point of immediate disposal is called________________? September 7, 2025 by Admin A. house sewer B. lateral sewer C. main sewer D. submain sewer ✅ The correct answer is option A.
Alkalinity in water is expressed as milli-grams per litre in terms of equivalent_______________? September 7, 2025 by Admin A. calcium carbonate B. magnesium carbonate C. sodium carbonate D. calcium hydroxide ✅ The correct answer is option A.
The overflow rate for plain sedimentation tanks is about__________________? September 7, 2025 by Admin A. 500 to 750 litres/hour/ m2 B. 1000 to 1250 litres/hour/ m2 C. 1250 to 1500 litres/hour/m2 D. 1500 to 2000 litres/hour/m2 ✅ The correct answer is option A.
Turbidity is measured on_______________? September 7, 2025 by Admin A. standard silica scale B. standard cobalt scale C. standard platinum scale D. platinum cobalt scale ✅ The correct answer is option A.
The effective size of sand particles used in slow sand filters is_______________? September 7, 2025 by Admin A. 0.25 to 0.35 mm B. 0.35 to 0.60 mm C. 0.60 to 1.00 mm D. 1.00 to 1.80 mm ✅ The correct answer is option A.