1. What is Alkalinity of water?
[A] It is the presence of ions in water that will neutralize hydrogen ions
[B] It is the measure of ability of water to neutralize hydroxides
[C] It is the measure of ability of water to neutralize carbonates
[D] It is the measure of ability of water to neutralize oxygen
Answer: Option A
2. The drop manholes are provided in sewerage system when there is _____.
[A] change in size of sewers
[B] change in the elevation of ground level
[C] change in alignment of sewer line
[D] change from gravity system to pressure system
Answer: Option B
3. The removal of dissolved organic matter occurs in ______.
[A] dual media filters
[B] rapid sand filters
[C] slow sand filters
[D] trickling filters
Answer: Option D
4. The concentration of hardness producing cations may be estimated using _____.
[A] pH meter
[B] Spectrophotometer
[C] Flame photometer
[D] Conductivity meter
Answer: Option B
5. Which of the following valve is also known as non-return valve?
[A] Air Valve
[B] Scour Valve
[C] Sluice Valve
[D] Check Valve
Answer: Option D