WorksheetsUnderstanding Water Treatment Processes
Total questions: 10
Worksheet time: 5mins
What are the two main types of water hardness?
Calcium hardness and magnesium hardness
Biological hardness and chemical hardness
Surface hardness and subsurface hardness
Temporary hardness and permanent hardness
How is water hardness expressed in numerical terms?
Water hardness is expressed in mg/L of CaCO3 or in degrees of hardness.
Water hardness is expressed in grams of salt.
Water hardness is measured in liters of water.
Water hardness is indicated by pH levels.
What units are commonly used to measure water hardness?
Liters per second (L/s)
Cubic meters (m³)
Parts per million (ppm), milligrams per liter (mg/L), degrees of hardness (dH)
Degrees Celsius (°C)
Describe the EDTA method for estimating water hardness.
The EDTA method estimates water hardness by titrating with EDTA and using an indicator to determine the endpoint.
The EDTA method measures pH levels in water samples.
The EDTA method involves boiling water to precipitate hardness ions.
The EDTA method uses a colorimeter to analyze water samples.
What are the common boiler troubles associated with hard water?
Increased water flow
Improved heat transfer
Lower energy costs
Scale buildup, reduced efficiency, overheating, corrosion, and increased maintenance.
What is the purpose of internal treatment in boiler feed water?
The purpose of internal treatment in boiler feed water is to prevent scale and corrosion.
To add chemicals for color enhancement
To increase the temperature of the water
To reduce the water pressure in the boiler
Explain the ion exchange process in water treatment.
Ion exchange is a water treatment process that removes undesirable ions by exchanging them with more desirable ions using ion exchange resins.
Ion exchange adds harmful chemicals to water.
Ion exchange is a filtration method using sand and gravel.
Ion exchange is a process that heats water to remove impurities.
What is the zeolite process and how does it work?
The zeolite process involves the combustion of organic materials for energy.
The zeolite process is a technique for growing crystals in a laboratory setting.
The zeolite process is a method of chemical synthesis using silica gel.
The zeolite process is a method of ion exchange and adsorption using zeolite minerals to purify or separate substances.
How does reverse osmosis help in desalination of brackish water?
Reverse osmosis increases the salinity of brackish water, making it less drinkable.
Reverse osmosis is a method of boiling water to remove impurities.
Reverse osmosis removes salts and impurities from brackish water, making it suitable for use.
Reverse osmosis adds salts to brackish water, enhancing its flavor.
What are the advantages of using sodium aluminate in water treatment?
Increased water hardness
Enhanced taste of water
Higher energy consumption
Advantages of using sodium aluminate in water treatment include effective coagulation and flocculation, removal of heavy metals and phosphates, and improved efficiency of treatment processes.
