Propane at 0.1 MPa, 20o C enters an insulated compressor operating at steady state and exits at 0.4 MPa, 90o C. Neglecting kinetic and potential energy effects, determine a) the power required by the compressor (kJ/kg) b) the change in specific entropy of propane (kJ/kg K) at the outlet and the inlet of the compressor.

Acompressor receives the shaft work to decrease the pressure of the fluid. a)- true b)- false

Ajournal bearing has a journal diameter of 3.250 in with a unilateral tolerance of 20.003 in. the bushing bore has a diameter of 3.256 in and a unilateral tolerance of 0.004 in. the bushing is 2.8 in long and supports a 700-lbf load. the journal speed is 900 rev/min. find the minimum oil film thickness and the maximum film pressure for both sae 20 and sae 20w-30 lubricants, for the tightest assembly if the operating film temperature is 160°f. a computer code is appropriate for solving this problem.

Journeyman training is usually related (clo2) a)-to specific tasks b)-to cost analysis of maintenance task c)-to control process to ensure quality d)-to installation of machinery