Water Supply and Wastewater Engineering MCQs (Part-3)
What is the main function of a water distribution network?
A Treat water
B Filter water
C Distribute water
D Store water
A water distribution network is designed to transport treated water from the treatment plant to consumers, ensuring a constant supply of clean water for domestic, industrial, and commercial use.
What type of pipe is often used for wastewater collection?
A PVC
B Copper
C Steel
D Cast iron
PVC pipes are widely used for wastewater collection due to their corrosion resistance, lightweight nature, and cost‐effectiveness. They are durable and efficient for transporting wastewater over long distances.
Which process is essential for water filtration?
A Filtration
B Disinfection
C Sedimentation
D Coagulation
Coagulation is a key process in water treatment, where chemicals are added to cause small particles in the water to clump together, forming larger particles that can be easily removed by sedimentation or filtration.
What is a common water treatment process used to kill bacteria?
A Filtration
B Reverse osmosis
C Chlorination
D Sedimentation
Chlorination involves adding chlorine or its compounds to water to kill harmful bacteria and microorganisms, ensuring the water is safe for drinking. It is one of the most common disinfection methods used worldwide.
What is the function of a sewage treatment plant?
A Filter water
B Treat wastewater
C Pump water
D Distribute treated water
A sewage treatment plant processes wastewater from households, industries, and commercial establishments. It removes contaminants from the water before it is either reused or safely released into the environment.
What does “stormwater management” focus on?
A Flood control
B Water purification
C Wastewater treatment
D Water storage
Stormwater management involves designing systems to control runoff, prevent flooding, and ensure that excess rainfall is properly managed through drainage, retention ponds, or infiltration techniques to avoid waterlogging.
Which process helps reduce water hardness?
A Coagulation
B Filtration
C Softening
D Sedimentation
Softening removes hardness‐causing minerals like calcium and magnesium from water, often using chemicals like lime or ion exchange processes. This improves water quality for both domestic use and industrial processes.
What type of system is used for recycling water from sinks and showers?
A Septic system
B Greywater recycling
C Reverse osmosis
D Rainwater harvesting
Greywater recycling involves treating and reusing water from household activities like washing dishes, laundry, and bathing. It is mainly used for non‐potable purposes such as irrigation, helping conserve water resources.
Which is a key parameter for measuring water quality?
A Salinity
B quantity
C Turbidity
D pH
pH is a crucial water quality parameter that indicates the water’s acidity or alkalinity. Maintaining a balanced pH level ensures water is safe for consumption and effective for various industrial and environmental uses.
What is the main use of reverse osmosis in water treatment?
A Adjust pH
B Disinfect water
C Remove salt
D Remove solids
Reverse osmosis is a process used in desalination to remove salt and other dissolved impurities from seawater or brackish water, making it suitable for drinking and agricultural use.
What is the purpose of sedimentation in wastewater treatment?
A Settle large particles
B Kill bacteria
C Remove dissolved solids
D Increase oxygen levels
Sedimentation allows heavier particles, including dirt and organic matter, to settle at the bottom of a tank. This reduces the amount of suspended solids in water, preparing it for further treatment.
What type of sewer system collects both stormwater and sewage?
A Open system
B Combined system
C Separate system
D Closed system
A combined sewer system is designed to collect both stormwater and sewage in the same pipes. While efficient, these systems can overflow during heavy rainfall, leading to untreated discharges into water bodies.
Which method helps to treat sewage without oxygen?
A Filtration
B Aerobic digestion
C Anaerobic digestion
D Chlorination
Anaerobic digestion is a biological process where microorganisms break down organic matter in the absence of oxygen. It is commonly used to treat sewage and generate biogas in wastewater treatment plants.
What does a pumping station primarily do?
A Pump water
B Treat wastewater
C Filter water
D Store water
A pumping station in water supply and wastewater systems is designed to pump water from one location to another, ensuring water flows effectively through pipelines to the desired destination, such as treatment plants or storage tanks.
What is used to measure water clarity?
A pH
B Hardness
C Alkalinity
D Turbidity
Turbidity measures the clarity of water by determining the amount of suspended particles, such as dirt, algae, and bacteria. High turbidity can indicate contamination and requires treatment to ensure safe water quality.