Aquatics International University: Equipment Course

Automatic controllers measure ORP (oxidation-reduction potential) and pH as the most critical measures of water quality. ORP indicates the presence of oxidizing or reducing agents in the water, which can affect its quality. pH, on the other hand, measures the acidity or alkalinity of the water, which is another important factor in determining water quality. Therefore, it is correct to say that ORP and pH are the most critical measures of water quality.

The statement is true because there are indeed three types of chemical feeders: liquid feeders, dry and erosion feeders, and in-line chlorine generation feeders. These feeders are used in various industries and applications to introduce chemicals into a system or process. Liquid feeders involve the use of pumps to inject liquid chemicals, while dry and erosion feeders use solid chemicals that dissolve or erode over time. In-line chlorine generation feeders produce chlorine on-site through electrolysis. Therefore, the given statement is correct.

An NSF certification is not just "nice to have" for filters, but it is actually required by most health agencies. This means that the statement "most health agencies don't require it" is incorrect. The correct answer is False.

Higher than normal pressure ratings on DE filters usually means that the element covers themselves have become soiled or clogged. When the filters are dirty, the flow of water through the filter is restricted, causing an increase in pressure. This indicates that the filter needs to be cleaned or replaced to maintain proper filtration. The other options, such as getting a new filter or the pressure gauge malfunctioning, are not necessarily the cause of the higher pressure ratings.

Proper efficient combustion and correct water flow are the two most critical elements to ensure proper heater function. Efficient combustion ensures that the fuel is burned effectively, providing sufficient heat for the water. Correct water flow ensures that the water is circulated properly through the heater, allowing it to be heated efficiently. Without these two elements, the heater may not function effectively and may fail to provide the desired heating results.

Ultraviolet radiation is an attractive option for aquatics facilities because it has the ability to destroy crypto, which is a harmful microorganism. Additionally, it has been used for years to augment chlorine disinfection, enhancing the effectiveness of the disinfection process. Furthermore, ultraviolet radiation can also reduce chloramines, which are undesirable byproducts of chlorine disinfection. Therefore, all of the given options are correct reasons for why ultraviolet radiation is an attractive option for aquatics facilities.

The given statement states that plastic pumps are far superior to brass. However, the correct answer is False. This implies that plastic pumps are not actually superior to brass.

Ozone is prohibited in pool water by most health agencies because it is a powerful oxidizer. Ozone has the ability to break down and destroy organic matter, including bacteria and viruses, making it an effective disinfectant. However, its strong oxidizing properties can also be harmful to humans and can cause irritation to the skin, eyes, and respiratory system. Therefore, health agencies discourage the use of ozone in pool water to ensure the safety and well-being of swimmers.

The primary maintenance task for any pump is keeping the strainer basket clean. This is because the strainer basket is responsible for trapping debris and preventing it from entering the pump, which can cause damage and decrease its efficiency. By keeping the strainer basket clean, the pump can continue to operate effectively and prevent any potential issues caused by clogged or blocked filters.

The reason to consider a new automatic control is because wireless options and new sensing probes offer superior technology. This means that by using these options, facilities can have more advanced and efficient monitoring systems. Additionally, the statement mentions that controllers only last a few years before they go bad, which further supports the need for a new automatic control. The other options mentioned, monitoring dozens of variables and none of the above, do not directly provide a reason to consider a new automatic control.

The statement claims that dedicated gas-fired heaters are both the least expensive and longest lasting. However, this is not necessarily true. While gas-fired heaters may be cost-effective and durable, there are other types of heaters that could be less expensive or have a longer lifespan. Therefore, the statement is false.

Chemical feed systems require careful maintenance because they carry high pH chemicals under pressure. The high pressure can cause leaks or damage to the system, while the high pH chemicals can be corrosive and cause deterioration of the system components. Regular maintenance is necessary to ensure the system is functioning properly and to prevent any potential hazards or malfunctions.