How is the purging of a carbon filter achieved?
A) Gasoline vapor held within the filter is continuously being drawn in by the engine.
B) The engine draws in fresh outside air through the carbon filter.
C) No purging takes place; the filter needs to be replaced at regular service intervals.
D) The gasoline vapor stored in the filter is transferred to the intake manifold by the fuel pump.

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]