a. What is the engine exhaust flow and dilution flow? (Hint: make use of the engine displacement volume, rpm, and the fact that it is a 4-stroke engine).
 b. What is the maximum concentration of CO in the exposure chamber (mg/m3).
 c. Plot [CO] versus time assuming the chamber starts out with CO=0 ppmv and the dilution air contains no CO. How long does it take to reach the maximum value value?
 d. Calculate the resulting %COHb after 2 hours exposure at Cmax? What is the persons (rat’s) fate?
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