If Organic Matter Is Useful in Water as a Nutrient

question 23

Multiple Choice

If organic matter is useful in water as a nutrient source, why does excess organic matter lead to a decrease in aquatic life?

• A)Aerobic bacteria feed on all the organic mater and use up all the oxygen.
• B)Anaerobic bacteria feed on the organic matter and populations increase, leading to consumption of all the food.
• C)Anaerobic bacteria eat all the aerobic bacteria, which leads to loss of oxygen in the water.
• D)The excess organic matter blocks light, which leads to a decrease in photosynthesis and causes a drop in oxygen production.
• E)none of the above

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Definitions:

Factory-Tuned

Refers to equipment or systems that have been pre-set or adjusted at the manufacturing site for optimal performance before delivery.

Proportional Controller

A type of feedback control system that outputs a control signal proportional to the error signal, which is the difference between the desired and actual system states.

Process Deviation

Process Deviation refers to the difference between the measured process variable and its desired setpoint, indicating the need for corrective action by the control system.

Offset

An offset refers to a deviation or displacement from a reference point or value, commonly used in contexts ranging from programming (memory addresses) to mechanical systems (alignment).