Steam of 100 bars, 600c in a well insulated tank having a volume of 1m starts to exhaust slowly. the leakage finishes at the pressure of tank reaches to 1 bar. assume no irreversibilities in the tank. find the final temperature in the tank and the specific volumes of steam at initial and final states

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

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]

The proportional limit is always greater than the yield strength for a material. a)-trune b)- false