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Power plant burns 150,000 tonnes (1 tonne = 1,000 kg) of coal each year. The coal has a 2.5% sulfur content, and the air pollution control equipment removals approximately 94% of sulfur. Assume 10% of the sulfur content ends up in the ash. The remaining combustion products are discharged through an 80 m stack with a diameter of 3.0 m. The stack off gas temperature and velocity are 320 oC and 4 m/s, respectively, and the atmospheric conditions are 102 kPa and 25 oC. If the atmospheric conditions are slightly unstable (Class C) and the wind velocity at 10 m elevation is 3.5 m/s:
1. Plot the ground level concentration of sulfur dioxide as a function of distance from the stack and determine the maximum ground level concentration at both with and without air pollution control and the distance from the stack where the maximum concentration occurs.
2. With air pollution control equipment in place, plot the contours for a ground level concentration that is half and ¼ of the maximum value and indicate on your plot the location of the stack and the location of the point where the maximum ground level concentration would occur.
an operator is holding a tool for a horizontal drilling task. the woman's elbow is flexed 45 degrees. The length of her forearm is 0.4m and the drill has mass of 5kg. Her forearm/hand weighs 20N and its center of mass
A floor slab has a fundamental bending frequency of 10Hz. A shaker is placed at the centre of the slab for a dynamic testing. The tests confirm that the slab displays a damping ratio of 2% of critical.
The entrance to Mt. Hood Meadows (elevation 3,075 ft at the point of crossing) is grade separated from Viking highway (elevation 3,050 ft at the point of crossing) and will have to be connected. The two roadways intersect at a right angle.
The tank material is such that it can withsatand tension caused by a volume expansion of 2%. Determine the max temperature rise in Celcius degress allowed without jeopardizing safety.
A hydrologic structure (e.g. a dam or a dike) is said to be designed for the N-year flood if it has a capacity which will be exceeded only by a flood equal oto or greater than N-year flood.
Determine the tension in the cable as the box moves between A and C and determine normal and tangential force components the road exerts on the car at this instant.
Two wells had been drilled on 40-acre spacing. Well 1 is injectionand Well 2 is producing well. Downhole injection pressure is 8500psi, and bottomhole pressure in producing well is 2400 psi.
Determine the runoff hydrograph that would be generated by a design 3-hr storm that generates excess rainfall at a constant rate of 10 mm/hr. assume baseflow is constant at 1.0 m3/s.
A diver is planning to salvage a Spanish galleon located in 200 feet of water. He plans to use a diving suit that will be supplied with air from a hose (assume this to be amply sized) connected to a compressor that he will locate in his boat on the s..
The bund channel is to be formed by the embankment only. The horizontal distance between two bund s is 50 m. The 1-hr rainfall expected during the recurrence interval of 10 yrs is 8 cm/hr.
A projectile is fired up into the air at a speed of 161 m/s at an angle of 64° relative to the horizontal. Determine the maximum height the projectile will reach.
A 100ft tape is calibrated at 68 degrees F, fully supported with 15 Ibs of tension and found to be 99.987 ft long. Is this tape is used fully supported with 15 Ibs of tension at 86 degrees F to measure a distance that is recorded as 136.48 ft,?
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