An ideal diesel engine has a compression ratio of 20 and uses air as the working fluid. the state of air at the beginning of the compression process is 95 kpa and 20°c. if the maximum temperature in the cycle is not to exceed 2200 k, determine (a) the thermal efficiency and (b) the mean effective pressure. assume constant specific heats for air at room temperature.

Afull journal bearing has a journal diameter of 27 mm, with a unilateral tolerance of -0.028 mm. the bushing bore has a diameter of 27.028 mm and a unilateral tolerance of 0.04 mm. the l/d ratio is 0.5. the load is 1.3 kn and the journal runs at 1200 rev/min. if the average viscosity is 50 mpa-s, find the minimum film thickness, the power loss, and the side flow for the minimum clearance assembly.