The structural layer coefficients sand sub-base, crush stone base and hot-mix asphalt are 0.10, 0.15, and 0.41. The drainage coefficients for sub-base and base are 0.9 and 1.0, respectively. Based on AASHTO 1993 Pavement Design Guide, for the hot-mix asphalt to provide a structural number of 2.6 to protect the base course (stone), what is minimum thickness needed for hot-mix asphalt layer (inches)?

Two flowing streams of argon gas are adiabatically mixed to form a single flow/stream. one stream is 1.5 kg/s at 400 kpa and 200 c while the second stream is 2kg/s at 500 kpa and 100 ? . it is stated that the exit state of the mixed single flow of argon gas is 150 c and 300 kpa. assuming there is no work output or input during the mixing process, does this process violate either the first or the second law or both? explain and state all your assumptions.

Calculate the bore of a cylinder that has a stroke of 18 inches and an extension time of 6 seconds at a flow rate of 4 gal/min.

Vibration monitoring this technique uses the noise or vibration created by mechanical equipment and in seme cases by plant systems to detemine their actual condtion. a)- true b)- false