Which of the Following Statements Concerning Green Chemistry Is Not

question 20

Multiple Choice

Which of the following statements concerning green chemistry is not correct?

• A) It is better to prevent waste than to treat or clean up waste after it is formed.
• B) Synthetic methods should be designed to use and generate substances that possess little or no toxicity to human health or the environment.
• C) Substances used in a chemical process should pose minimal risk for accidents.
• D) Raw materials should be renewable whenever technically and economically practical.
• E) Chemical syntheses should be done at extremely high temperatures to ensure harmful bacteria are destroyed.

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Definitions:

Relay

Any of a number of devices that receives a signal and then effects an action. In vehicle electrical circuits, relays are used to allow a small current circuit to control a large current circuit such as in a starter relay. Also known as a pilot.

Transistor

A semiconductor device used to amplify or switch electronic signals and electrical power, fundamental in modern electronic circuits.

V-Ref

Reference voltage. ECU or ECM conditioned voltage (usually 5 volts DC) supplied to various sensors (such as thermistors, potentiometers) in truck electronic circuits. In most cases, a portion of the voltage is returned to indicate the status of sensor.