3. Particle Size Distribution

Try these first

1. 1.

   What is the unit used to report concentrations of PM in air?

   Hint

   Think about the small amount of particles and their measurement.

2. 2.

   What is PM2.5?

   Hint

   Consider how small the particles are compared to PM10.

3. 3.

   What is the primary advantage of using a high-volume sampler?

   • Lower cost
   • High accuracy
   • Large volume collection

   Hint

   Consider what large volumes affect in sampling.

4. 4.

   True or False: PM2.5 concentrations can be greater than PM10 concentrations.

   • True
   • False

   Hint

   Think about the definitions of particulate matter.

5. 5.

   A city has high levels of PM2.5 during the winter. Propose a plan using cascade impactors and real-time monitoring to address this issue.

   Hint

   Consider local traffic patterns and heating sources during winter.

6. 6.

   Critically evaluate the role of real-time monitoring in managing air quality during pollution emergencies.

   Hint

   Think about the difference between immediate action and long-term strategies.