Eutrophication and Oxygen Depletion in Natural Wasters Can Be Very

question 17

Multiple Choice

Eutrophication and oxygen depletion in natural wasters can be very damaging to stream ecosystems. Which of the following is the primary cause of oxygen depletion in streams?

• A) excessive nutrients
• B) acid rain
• C) acid mine drainage
• D) iron oxide runoff
• E) excessive carbon dioxide

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Definitions:

Electrical Principle

Fundamental laws or concepts in electricity, such as Ohm's law, which govern the behavior and operation of electrical systems and components.

Wheel Speed Sensor

Reluctor-type electromagnetic device used to signal wheel speed data to an antilock controller. Consists of a permanent magnet and toothed reluctor. As the reluctor wheel cuts through a magnetic field, AC is generated and a frequency signal produced.

ABS Outputs

The signals or actions produced by the Anti-lock Braking System to prevent wheel lockup and maintain steering control during braking.

PLC

Programmable Logic Controller, an industrial digital computer adapted for the control of manufacturing processes, such as assembly lines, robotic devices, or any activity that requires high reliability, ease of programming, and process fault diagnosis.