Energy transfer is involved in each of the following systems. Select the ones that involves mainly work interaction. (Select all that apply.) Multiple select question. A gas turbine A rising piston Water heated in a tub Boiling water on a gas stove A rotating shaft

The temperature of air decreases as it is compressed by an adiabatic compressor. a)- true b)- false

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

Athin walled concentric tube exchanger is used to cool engine oil from 160°c to 60°c with water that is available at 25°c acting as a coolant. the oil and water flow rates are each at 2 kg/s, and the diameter of the inner tube is 0.5 m and the corresponding value of the overall heat transfer coefficient is 250 w/m2. oc. how long must the heat exchanger be to accomplish the desired cooling? cpwater=4.187 kj/kg-candcpengine el=2.035 kj/kg·°c, oil . 120]