A120 cy per hr maximum output pump is used to place the concrete for a 200 cy slab. the concrete is supplied by 8 cytransit-mix trucks arriving to the site on 12 min intervals. the concrete batch plant is located 5 miles from the site. averagetruck speed is 30 mph. each transit-mix truck takes, on average, 10 min to discharge. the placement crew size is 7 workers. average worker output is 5 cy of concrete per hr. (a) how long will the operation take? (b) how can the operation bereorganized more effectively?

Determine the damped natural frequencies and the steady state response of a decoupled damped forced two degrees of freedom system. 10ä1 + 2q1 20q1 10 cos t; 10q2 +4q2 + 40q2 10 cos t

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.

What is the main objective of using reheat rankine cycle?