A hallow shaft is required to transmit 600kw at 110rpm, the maximum torque being 20% greater than the mean. The shear stress is not to exceed 63Mpa and twist in a length of 3meters not a exceed 1.4degress. find the external diameter of the shaft ,if the internal diameter to the external diameter is 3/8. Take modulus of rigidity as 84Gpa ​

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.

What is the main objective of using reheat rankine cycle?