Acylindrical brass rod having a minimum tensile strength of 450 mpa (65,000 psi), a ductility of at least 13%el, and a final diameter of 12.7 mm (0.50 in.) is desired. some brass stock of diameter 19.0 mm (0.75 in.) that has been cold worked 35% is available. describe the procedure you would follow to obtain this material. assume that brass experiences cracking at 65%cw

The y form of iron is known as: a) ferrite b) cementite c) perlite d) austenite

Shafts are machine elements that are used to a) carry axial loads b) direct shear loads c) transmit power d) rotate at constant speed e) none of the above circular and square shafts subjected to the same torque under the same circum behave a) the same way b) almost the same way

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.