Technician A says the check ball in a shaft must be seated in the correct direction. Technician B says some shafts are hollow with internal bushings to support another shaft. Who is correct?
A. A only
B. B only
C. Both A and B
D. Neither A nor B
Answer: C
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What will be an ideal response?
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 ____ is a structure built around and enclosing electrical, mechanical, or plumbing materials.
A. chimney B. block C. chase D. template
If the transfer case fluid level is low, why should the technician also check the level of the automatic transmission?
A) The two both used ATF B) The fluid levels are checked using the same access plug C) There may be a leaking double lip seal between the two units D) The two use the same oil pan