Quiz 2

Question 1

Typical trace element markers for emissions of coal-fired power plants are (select all that apply):
A) Mercury (Hg)
B) Chromium (Cr)
C) Zinc (Zn)
D) Aresnic (As)

Answer 1

A) Mercury (Hg)
D) Aresnic (As)

Question 2

Which of the following mechanisms of collection of particles is effective for removing particles of <1.0 um?

A) Inertial Impaction
B) Interception
C) Diffusion
D) Both Interception and Diffusion

Answer 2

D) Both Interception and Diffusion

Question 3

Background secondary particulate matter can be found abundant in the following size fraction:

A) 5.8 - 9.0 um
B) 4.7 - 5.8 um
C) .7 - 1.1 um
D) < 0.4

Answer 3

C) .7 - 1.1 um

Question 4

The larger particles above 2.5 um can be emitted from industrial sources, mostly removed by gravitational settling and they are:

A) Accumulation range
B) Transient nuclei
C) Mechanically generated aerosol range
D) Aitken nuclei range

Answer 4

C) Mechanically generated aerosol range

Question 5

Which catalyst support has been commonly used for air pollution control and why?

Answer 5

Honey combs due their low pressure drop

Question 6

Go back and review.