Engineering, 05.08.2019 17:30 clarawulf9477
From the list below, select four situations in which casting is the preferred fabrication technique.
(1) when mechanical strength is not an important consideration
(2) for economical producing of parts that require very close dimensional tolerances (e. g. bushing and gears)
(3) for large pieces and/or complicated shapes
(4) for alloys having low ductilities
(5) when it is the most economical fabrication technique
(6) for metals having high melting temperatures
from the list below, select four situations in whi
(1), (2), (4), (5)
(1), (2), (4), (6)
(2), (3), (5), (6)
(2), (3), (4), (6)
(1), (3), (4), (5)
Answers: 1
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Along 8-cm diameter steam pipe whose external surface temperature is 900c connects two buildings. the pipe is exposed to ambient air at 70c with a wind speed of 50 km/hr blowing across the pipe. determine the heat loss from the pipe per unit length. (b) air at 500c enters a section of a rectangular duct (15 cm x 20 cm) at an average velocity of 7 m/s. if the walls of the duct are maintained at 100c. a) the length of the tube for an exit temperature of the air to be 40 0c. b)the rate of heat transfer from the air. c) the fan power needed to overcome the pressure drop in this section of the duct.
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From the list below, select four situations in which casting is the preferred fabrication technique....
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