1. It is proposed to install a pulse-jet fabric filter system to clean a 10,000 scfm air stream at 250 F, containing 4 grains/ft3 of pollutant. For a 99% efficiency, the average air-to-cloth ratio is 2.5 cfm/ft2 cloth. The following information provided by the baghouse manufacturer is available at the beginning of the selection process. A B D Excellent Above Average Fair Excellent Filter Bag Tensile Strength Recommended max. operating temperature, OF Resistance Factor 260 275 260 220 0.9 1.0 0.5 0.9 2.6 3.8 2.0 Relative Cost per bag Standard size 1.0 l x 16' 8 x 16' 10" x 16' 1 x 16' a. Determine the filtering area required for this question. (5 points) b. Based on the required area and the above information, select the most suitable filter bag and calculate the number of them that should be provided. The proposal of a pulse-jet device using strong forces to clean the bags requires the selection of a fabric with at least above average tensile strength. (10 points)