The term ______________________ indicates the source of heat while the system is operating in the heating mode and the medium that is ultimately being treated.
Fill in the blank(s) with the appropriate word(s).
air-to-air
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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?
Shielded metal arc welding (SMAW) or stick welding is the most commonly used welding process.
Answer the following statement true (T) or false (F)
Data obtained from aerial photography showed six vehicles on a 700 ft-long section of road. Traffic data collected at the same time indicated an average time headway of 3.7 sec. Determine (a) the density on the highway, (b) the flow on the road, and (c) the space mean speed.
What will be an ideal response?
In the old method of specifying a machining process, a G would specify that:
A. A grinding process is required. B. A machining process is required. C. A "G" finish is required. D. The specified surface was affected by revision "G"