The radiator of a steam heating system has a volume of 20 L and is filled with superheated water vapor at 200 kPa and 150oC. At this moment, both the inlet and the exit valves to the radiator are closed. After a while, the temperature of the steam drops to 40oC as a result of heat transfer to the room air. Determine the entropy change of the steam during this process

Steel is coated with a thin layer of ceramic to protect against corrosion. what do you expect to happen to the coating when the temperature of the steel is increased significantly? explain.

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.

Inspection for bearing condition will include: (clo4) a)-color b)-smell c)-size d)-none of the above