Problem #1 (A - 15 pts; B - 10 + 25 pts: 50 pts) A. Circle the single answer that represents your best response to the question. A-1 TLV of benzene (C6H6) is 0.5 ppm at 25C and 1 atm. TLV of benzene in mg/m' is about: a. 2.0 mg/m b. 1.6 mg/m c. 0.9 mg/m d. 0.5 mg/m) none of the above e. A-2 Fanning friction factor for smooth pipe at Reynolds number 1.5x 10* is about a. 0.001 b. 0.002 c. 0.005 d. 0.009 ALS The results from a dispersion model always show that a. the gas always disperses quickly leading to low downwind concentrations b. the rate of release does not have a large effect on the downwind concentrations it is always better not to release anything d the results are always the same independent of the dispersion model selected C 1. Dispersion of plume with a continuous steady.state source at height II, above ground level and 61'F