HT A School CHT Practice Test 2025 – Complete Exam Prep

Question: 1 / 400

What is the air pressure range supplied by motor-driven blowers in the aeration blower?

3 to 6 psi

5 to 12 psi

The air pressure range supplied by motor-driven blowers in aeration systems is typically between 5 to 12 psi. This range is optimal for providing sufficient aeration in wastewater treatment processes, ensuring adequate oxygen transfer to support the growth of aerobic microorganisms. Maintaining this pressure ensures efficient operation of the aeration tank while preventing excessive pressure that could lead to operational issues or damage.

Pressure ranges lower than 5 psi may not effectively facilitate air movement into the water column, leading to inadequate oxygen supply. On the other hand, pressures beyond 12 psi can create challenges in terms of both the energy required to operate the blower and the risk of system overpressure, which can lead to safety concerns or equipment damage. Thus, the 5 to 12 psi range is considered the ideal balance for efficient air supply in these applications.

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10 to 15 psi

15 to 20 psi

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