STB 322 Theory Questions: BOD Analysis, Hazardous Substances, and Toxicity Testing

300 Level Department of Science Laboratory Technology exam questions and detailed answers. Download the answers in document format. Correct, detailed, and straightforward answers.

Questions:

a. During BOD5 analysis the BOD bottle should be stored for 5 days in an incubator. Give two (2) reasons why.

ii. Mention two factors that contribute to high BOD level.

iii. What is the difference between BOD and COD.

b. List the eight characteristics of hazardous substances.

ii. List four animals used in toxicity tests.

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