Environmentalhard · Past Paper
In the environment, 'BOD' is usually measured over a period of how many days?
A1 day
B5 days
C30 days
D1 year
✓ Correct Answer: B — 5 days
BOD5 is the standard test where the consumption of oxygen is measured over a 5-day incubation period at 20 degrees Celsius.
Share this question
More from Environmental
- The pH value of 'normal' rain is approximately:
- What is the unit used to measure the thickness of the ozone layer?
- Which chemical is used as a 'fire suppressant' but contributes to ozone depletion?
- What is the primary source of 'Particulate Matter' in the atmosphere?
- Which of the following describes 'Milankovitch Cycles'?