Estimate the service flow rate for level of service D for a six-lane freeway (three lanes in each direction with 12-ft (3.6m) lanes and obstructions 6 ft (1.8 m) from the edge of pavement. The section is to accommodate 5 percent single unit trucks and 5 percent tractor trailer trucks. The design speed is 75 mph, and the section has a +3 percent grade that is 0.7 mile long. NOTE: assume the road is located in a rural region (i. e. TRD = 0.5 ramps / 1 mile).

Acompressor receives the shaft work to decrease the pressure of the fluid. a)- true b)- false

Aplate clutch has a single pair of mating friction surfaces 250-mm od by 175-mm id. the mean value of the coefficient of friction is 0.30, and the actuating force is 4 kn. a) find the maximum pressure and the torque capacity using the uniform-wear model. b) find the maximum pressure and the torque capacity using the uniform-pressure model.

For the closed feedwater heater below, feedwater enters state 3 at a pressure of 2000 psia and temperature of 420 °f at a rate of ix10 ibhr. the feedwat extracted steam enters state 1 at a pressure of 1000 psia and enthalpy of 1500 btu/lbm. the extracted er leaves at an enthalpy of 528.7 btu/lbm steam leaves as a saturated liquid. (16) a) determine the mass flow rate of the extraction steam used to heat the feedwater (10) b) determine the terminal temperature difference of the closed feedwater heater