In residential construction, posts and beams are usually spaced at ____' on center.
A. 5
B. 6
C. 4
D. 3
Answer: C
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A 1530 MW bituminous coal-fired wet-bottom plant emits mercury into the atmosphere. The EPA AP-42 emission factor for the power plant is 16 lb of Hg per 1012 btu. The plant operates around the clock, 365 days a year, 24 hours per day. The 20 m3/s (actual) of exhaust from the plant exits the 2-mdiameter stack at 700°C. The stack is 50 m high. The air pressure within the stack is essentially equal to the ambient air pressure of 1 atm. The average ambient temperate measured at the stack height is 20°C. The average temperature measured at 110 m on a nearby radio tower is 18.5°C. The prevailing wind speed is 3 m/s. Determine:
a. The mass emission rate of Hg in units of mg/s b. The plume rise from the stack in m c. The maximum ground-level pollutant concentration (mg/m3) from an elevated source in ppm d. The concentration of mercury 2 km directly downwind from the power plant. Calculate the concentration at ground level for gaseous pollutants that are not absorbed by the ground. What will be an ideal response?
A low-head hydro dam forms a rectangular lake 47 ft. by 126.25 ft. What is the surface area of the lake??
Fill in the blank(s) with the appropriate word(s).
Which of the following classes are judged on the rider’s position and effectiveness?
a. hunt seat equitation c. hunter under saddle b. hunter over fences d. no answers
Figure 10-2 In Figure 10-2, the data is sent to TT401 by a ____ connection.
A. hydraulic line B. electrical line C. mechanical linkage D. capillary tube