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).

Consider a large isothermal enclosure that is maintained at a uniform temperature of 2000 k. calculate the emissive power of the radiation that emerges from a small aperture on the enclosure surface. what is the wavelength ? , below which 10% of the emission is concentrated? what is the wavelength ? 2 above which 10% of the emission is concentrated? determine the wavelength at which maximum spectral emissive power occurs. what is the irradiation incident on a small object placed inside the enclosure?

An air compression refrigeration system is to have an air pressure of 100 psia in the brine tank and an allowable air temperature increase of 60°f for standard vapor compression cycle temperatures of 77 f entering the expansion cylinder and 14 f entering the compression cylinder, calculate the coefficient of performance a. 2.5 b 3.3 c. 4.0 d. 5.0

Most leaks in reciprocating air compressors can be detected and minimized by: (clo4) a)-detecting leakage areas using ultrasonic acoustic detector. b)-tightening joints and connections c)-replacing faulty equipment d)-all of the given options