Question $1$

The difference between Rudnick$-$Milton equation and Wells$-$Riley equation is that:

a$)$ Rudnick$-$Milton equation requires steady$-$state.

b$)$ Wells$-$Riley equation does not require knowledge about ventilation rate $(Q)$

c$)$ Rudnick$-$Milton approach works with non$-$steady state and does not require knowledge of ventilation rate $($Q$)$ as long as re$-$breathed fraction can be calculated $($e$.$g$.$ using indoor CO$2$

concentration measurements$)$ during total exposure time.

d$)$ All above correct.

a$)$

b$)$

c$)$

d$)$

Question $2$

Which chemical sources indoors react with ozone?

a$)$ Only molecules containing at least one triple bond.

b$)$ Surface$-$bound and$/$or airborne molecules containing one or more double bonds.

c$)$ Saturated fats $($only with single bonds$)$

d$)$ Aged dust previously exposed to high levels of ozone, containing no skin flakes or skin oil $($squalene$).$

a$)$

b$)$

c$)$

d$)$