Massachusetts Wastewater Practice Exam

What scenario would suggest a malfunction in a reagent pump system?

1. Even flow readings

2. Variable flow rates

3. Blocked discharge lines

4. Inconsistent pH levels

The correct answer is: Inconsistent pH levels

In a reagent pump system, consistent and accurate dosing is crucial for maintaining the desired chemical balance in wastewater treatment processes. When pH levels are inconsistent, it often indicates that the system is not delivering the reagent in a precise manner. This inconsistency can arise from a malfunction in the pump itself or issues elsewhere in the system, such as clogged lines or incorrect calibration. When pH levels fluctuate unexpectedly, it suggests that the reagent is either being over-applied or under-applied. The pH of wastewater is a key indicator of its treatment condition; therefore, significant variability can lead to improper treatment and affect the overall efficiency of wastewater management. The other scenarios—such as even flow readings, variable flow rates, and blocked discharge lines—may indicate issues with flow or blockages, but they do not directly reflect on the reagent's effectiveness in maintaining pH. Inconsistent pH levels are a clear and direct sign that the reagent dosing is not being handled properly, highlighting a malfunction in the reagent pump system.