A. Provide a schematic to explain direct shear test. b. Present an example of shear strength applied in geotechnical engineering design (must include the schematic and explanation)
c. Following are the results of three drained direct shear tests conducted on clay. Graphically and analytically, determine the drained angle of friction and cohesion for the clayey soil.

Normally Stress(kpa) Shear Stress(kPa)

100 51
150 67
200 85

During a steady flow process, the change of energy with respect to time is zero. a)- true b)- false

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

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.