Saturated liquid refrigerant R134a enters a throttling device (i. e. an expansion valve) at 1 MPa pressure, and exits the valve at 100 kPa. Upon exiting, the drop in the refrigerant temperature is closest to

Fluids at rest possess no flow energy. a)- true b)- false

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.

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